Polycyclic aromatic compound

Abstract

The present invention relates to a polycyclic aromatic compound having a structure comprising one or more structural units represented by formula (1), wherein an amino group substituted with a naphthyl group is bound to a benzene ring condensed to a central basic skeleton containing Y1 (e.g., B, etc.) and nitrogen (N) in formula (1), and at least one among RNY1 and RNY2 has a group represented by formula (a) (where A1 is, for example, a substituted or unsubstituted alkyl, etc.).

Description

polycyclic aromatic compounds The present invention relates to polycyclic aromatic compounds. In particular, the present invention relates to polycyclic aromatic compounds comprising nitrogen and boron. The present invention also relates to materials for organic devices comprising said polycyclic aromatic compounds, organic electroluminescent elements, and display devices and lighting devices. Conventionally, display devices utilizing electroluminescent light-emitting elements have been extensively researched due to their potential for power saving and miniaturization. Additionally, organic electroluminescent elements made of organic materials have been actively explored due to their ease of lightweighting and scaling up. In particular, active research has been conducted on the development of organic materials possessing emission characteristics such as blue, one of the three primary colors of light, as well as organic materials equipped with charge transport capabilities for holes and electrons (possessing the potential to become semiconductors or superconductors), regardless of whether they are polymer or low-molecular-weight compounds. An organic EL device has a structure comprising a pair of electrodes consisting of an anode and a cathode, and one or more layers containing an organic compound disposed between the pair of electrodes. The layers containing the organic compound include a light-emitting layer or a charge transport / injection layer that transports or injects charges such as holes and electrons, but various organic materials suitable for these layers have been developed. Among them, Patent Documents 1 and 2 disclose that a polycyclic aromatic compound containing boron is useful as a material for organic electroluminescent devices. It has been reported that an organic electroluminescent device containing this polycyclic aromatic compound has good external quantum efficiency. Patent Document 3 discloses a polycyclic aromatic compound in which at least one of the rings of the basic framework containing boron is a tricyclic condensation structure, and it has been reported that an organic electroluminescent device containing this polycyclic aromatic compound has good external quantum efficiency. [Prior Art Literature] [Patent Literature] Patent Document 1: Specification of Chinese Patent Application Publication No. 106467554 Patent Document 2: International Publication No. 2015 / 102118 Patent Document 3: Published Patent Application No. 10-2022-0021418 As mentioned above, various materials have been developed for use in organic EL devices, but further improvements to materials for organic EL devices are required. The present invention aims to provide an improved compound as an organic device material, such as an organic EL device. The inventors, in order to solve the above problem, carefully examined the matter and discovered that when a polycyclic aromatic compound is used in an emissive layer in which an amino group substituted on an aromatic ring of a central basic framework containing boron and nitrogen is further substituted with a naphthyl substituent, and an aryl substituent on at least one nitrogen of the basic framework is a substituent at an ortho position, an organic electroluminescent device having a narrow full width at half maximum of the emission peak, high efficiency, and in particular a long lifespan is obtained, and thus completed the present invention. That is, the present invention provides a polycyclic aromatic compound as described below, and also a material for an organic device comprising a polycyclic aromatic compound as described below. <1> A polycyclic aromatic compound having a structure consisting of one or more structural units represented by the following formula (1); Among the (1) foods, Rings A, B, and C are each independently substituted or unsubstituted aryl rings or substituted or unsubstituted heteroaryl rings, and The D ring is a substituted or unsubstituted naphthalene ring, and Y 1 Silver, B, P, P=O, P=S, Al, Ga, As, Si-R S , or Ge-R Ge and, the above Si-R S R of S and Ge-RGe R of Ge are, each independently, a substituted or unsubstituted aryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and R NY1 and R NY2 Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, or a substituted or unsubstituted cycloalkyl, provided that at least one has a group represented by formula (a). R NY1 Silver, Ring of A and R 1 It may be joined with at least one of them through a single joint or a connector, and R NY2 It may be coupled to at least one of ring A and ring B through a single bond or a linker, and R 1 ~R 3 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and Among equation (a), A 1silver, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via a linker or single bond), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via a linker or single bond), substituted or unsubstituted diarylamino (two aryls may be connected to each other via a linker or single bond), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via a linker or single bond), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and R 1a ~ R 4a is hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and * indicates the bonding position with N, The above R 2 , R 3 , R 1a ~R 4aTwo adjacent groups in a single benzene ring may be bonded to each other to form a substituted or unsubstituted aryl ring or a substituted or unsubstituted heteroaryl ring together with the said benzene ring, and In the above structure, at least one of the aryl ring or heteroaryl ring may be condensed into at least one cycloalkane, and at least one hydrogen in the said cycloalkane may be substituted. At least one hydrogen in the above structure may be substituted with cyano or halogen, and In the above structure, at least one hydrogen may be replaced with deuterium, and at least one nitrogen may be nitrogen-15 ( 15 It may be substituted with N), and at least one sulfur is sulfur-33( 33 S), Sulfur-34( 34 S) or Sulfur-36( 36 It may be replaced with S), and at least one oxygen is oxygen-17( 17 O) or Oxygen-18 ( 18 It may be substituted with O), and at least one carbon is carbon-13 ( 13 It may be substituted with C), and at least one boron is boron-11( 11 It may be replaced with B). <2> Formula (1) is represented as either Formula (1-A) or Formula (1-B), <1> Polycyclic aromatic compounds listed in Among each of Formula (1-A) and Formula (1-B), Ring A, Ring B, Ring C, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the A ring, B ring, C ring, Y in formula (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and each have the same meaning, R dA1 ~R dA7 and R dB1 ~R dB7 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted arylthio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and two adjacent groups are bonded to each other, A cycloalkane may be formed, and at least one hydrogen in the said cycloalkane may be substituted. <3> Formula (1) is represented as any one of Formula (1-A-1), Formula (1-A-2), Formula (1-B-1), or Formula (1-B-2). <1> Polycyclic aromatic compounds listed in Among each of the formulas (1-A-1), (1-A-2), (1-B-1), and (1-B-2), C ring, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the C ring, Y in equation (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and each have the same meaning, R dA1 ~R dA7and R dB1 ~R dB7 R in Equation (1-A) and Equation (1-B), independently of each dA1 ~R dA7 and R dB1 ~R dB7 and each have the same meaning, X B neun, >O, >NR NZ , >C(-R CZ )2, >Si(-R IZ )2, >S, or >Se, and R NZ , R CZ , and R IZ are each independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and >C(-R CZ )2's 2 R CZ They may be bonded to each other to form rings, and >Si(-R IZ )2's 2 R IZ They may combine with each other to form a ring, R aA1 ~R aA3 , R bA1 ~R bA4 , R aB1 ~R aB3 and R bB1 ~R bB4Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. <4> A C ring which is a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted pyrene ring, a substituted or unsubstituted dibenzofuran ring, a substituted or unsubstituted dibenzothiophene ring, a substituted or unsubstituted carbazole ring, or a substituted or unsubstituted fluorene ring, <1> ~ <3> Polycyclic aromatic compounds listed in any one of the following. <5> Equation (a) is a cause represented by equations (a-1) to (a-45), <1> ~ <4> Polycyclic aromatic compounds listed in any one of the following. Among equations (a-1) to (a-45), * indicates the bonding position with N, X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As, >NR Nzy R of Nzy , and >C(-R Czy)2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and the above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring, Me is methyl, tBu is t-butyl, tAm is t-amyl, and D is deuterium. <6> R NY1 and R NY2 having a group in which all are represented by Equation (a), <1> ~ <5> Polycyclic aromatic compounds listed in any one of the following. <7> R NY1 and R NY2 Among them, one party has the energy represented by formula (a), and the other party has formula (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY -b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) and equation (R NY -e-1)~Equation(R NY -e-15) Caused by any one of the following, <1> ~ <5> Polycyclic aromatic compounds listed in any one of the following. Equation (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY-b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) or expression(R NY -e-1)~Equation(R NY -e-15)m, X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As, >NR Nzy R of Nzy , and >C(-R Czy )2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and the above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring, R e11 ~R e17 , R e21 ~R e27 , and R e31 ~R e37 Each is independently hydrogen, deuterium, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, a substituted or unsubstituted cycloalkyl, or a substituted silyl, and Ak is a substituted or unsubstituted alkyl, and Me is methyl, D is deuterium, and * indicates the bonding position with N. <8> R NY1 and R NY2 Either one of them has a group selected from Equation (a-4), Equation (a-9), Equation (a-10), Equation (a-13), Equation (a-14), Equation (a-19), Equation (a-20), Equation (a-29), or Equation (a-30), and the other side has Equation (R NY -e-4)~Equation(R NYhaving a group selected from -e-15), <1> Polycyclic aromatic compounds listed in <9> Indicated by any one of the following formulas, <1> Polycyclic aromatic compounds listed in; <10> <1> ~ <9> A material for an organic device containing a polycyclic aromatic compound described in any one of the following. <11> It comprises a pair of electrodes consisting of an anode and a cathode, and a light-emitting layer disposed between the pair of electrodes, wherein the light-emitting layer <1> ~ <9> An organic electroluminescent device containing a polycyclic aromatic compound described in any one of the following. <12> The above-mentioned light-emitting layer comprises a host and the above-mentioned polycyclic aromatic compound as a dopant, <11> Organic electroluminescent device described in <13> The above host is an anthracene compound, a fluorene compound, a dibenzochrycene compound, or a pyrene compound, <12> Organic electroluminescent device described in <14> <11> ~ <13> A display device or lighting device equipped with an organic electroluminescent element as described in any one of the above. The present invention provides a polycyclic aromatic compound that exhibits superior luminescence characteristics as a material for organic devices, such as organic electroluminescent devices. The polycyclic aromatic compound of the present invention can be used in the manufacture of organic devices, such as organic electroluminescent devices. Figure 1 is a schematic cross-sectional view showing an example of an organic electroluminescent device. The present invention will be described in detail below. The description of the constituent elements described below may be based on representative embodiments or specific examples, but the present invention is not limited to such embodiments. Furthermore, in this specification, a numerical range indicated by "~" means a range that includes the values ​​described before and after "~" as lower and upper limits. Also, in the description of structural formulas in this specification, "hydrogen" means "hydrogen atom (H)." In this specification, organic electroluminescent devices may be referred to as organic EL devices. In this specification, chemical structures or substituents are sometimes represented by the number of carbon atoms; however, when a substituent is substituted into a chemical structure or when a substituent is substituted with another substituent, the number of carbon atoms refers to the number of carbon atoms of each chemical structure or substituent, and does not refer to the total number of carbon atoms of the chemical structure and the substituents, or the total number of carbon atoms of the substituents. For example, "substituent B of carbon number Y substituted by substituent A of carbon number X" means that "substituent A of carbon number X" substitutes "substituent B of carbon number Y", and carbon number Y is not the total number of carbon atoms of substituent A and substituent B. Furthermore, for example, "substituent B of carbon number Y substituted by substituent A" means that "substituent A (without limiting the number of carbon atoms)" substitutes "substituent B of carbon number Y", and carbon number Y is not the total number of carbon atoms of substituent A and substituent B. In this specification, multiple structural formulas of aromatic compounds are described. Although aromatic compounds are described by combining double and single bonds, in reality, since π electrons resonate, multiple equivalent resonance structures exist even for a single substance, such as those in which double and single bonds alternate. In this specification, only one resonance structural formula is described for each substance, but unless specifically limited, other organically chemically equivalent resonance structural formulas are also included. In this specification, "adjacent" means that they are directly bonded to each other in the same ring unless specifically limited, and "adjacent group" means a group that is directly bonded to each of the atoms that are directly bonded to each other in the same ring. 1. Polycyclic aromatic compounds The polycyclic aromatic compound of the present invention is a polycyclic aromatic compound having a structure composed of one or more structural units represented by formula (1). The polycyclic aromatic compound of the present invention is Y in formula (1). 1An amino group substituted with a naphthyl group is attached to a benzene ring condensed to a central basic framework containing nitrogen (N), and R NY1 and R NY2 At least one of them has a group represented by formula (a). When the polycyclic aromatic compound of the present invention is used as a material for the light-emitting layer of an organic electroluminescent device, it can increase the external quantum efficiency of the device, narrow the half-width of light emission, and, in particular, improve the device lifespan. Among the structures consisting of one or more structural units represented by formula (1), ring A or ring B is a substituted or unsubstituted aryl ring, or a substituted or unsubstituted heteroaryl ring. The C ring is a substituted or unsubstituted aryl ring, or a substituted or unsubstituted heteroaryl ring. Regarding the aryl or heteroaryl ring as the C ring and the substituents thereon, the descriptions below regarding the aryl or heteroaryl ring as the A ring and B ring and their substituents may apply. The C ring is preferably a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted pyrene ring, a substituted or unsubstituted dibenzofuran ring, a substituted or unsubstituted dibenzothiophene ring, a substituted or unsubstituted carbazole ring, or a substituted or unsubstituted fluorene ring; it is more preferably a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted dibenzofuran ring, or a substituted or unsubstituted dibenzothiophene ring; and it is particularly preferably a substituted or unsubstituted benzene ring or a substituted or unsubstituted naphthalene ring. The D ring is a substituted or unsubstituted naphthalene ring. That is, at least one of the substituents bonded to the amino group of Formula (1) is a substituted or unsubstituted naphthyl group. For the substituents in the case where the naphthalene ring is substituted, the description of the substituents on the A ring or B ring (e.g., the first substituent and the second substituent) described later may be applied. The aryl ring or heteroaryl ring in the A ring or B ring is Y 1 , NR NY1 and / or NR NY2 It is desirable that it is combined with a 5-membered ring or a 6-membered ring. 「Y 1 , NR NY1 and / or NR NY2 The phrase “combined with a 5-membered ring or a 6-membered ring” means that a ring is formed solely by this 5-membered or 6-membered ring, or that another ring is further condensed to include this 5-membered or 6-membered ring to form a ring. In other words, the 5-membered or 6-membered ring constituting all or part of the ring is Y 1 , NR NY1 and NR NY2 It means that it is bonded to. In the case of aryl or heteroaryl rings in A and B rings, two or three consecutive ring-forming atoms (carbon atoms) are Y 1 and NR NY1 and / or NR NY2 It is sufficient if they are directly bonded to. That is, in an aryl or heteroaryl ring of an A ring, any set of three consecutive ring-forming atoms (carbon atoms) Y 1 , NR NY1 and NR NY2 It is directly bonded to, and in an aryl ring or heteroaryl ring of the B ring, any pair of two consecutive ring-forming atoms (carbon atoms) are Y 1 and NR NY2 It is directly combined with. As for the “aryl ring” in the A ring and B ring of formula (1), for example, an aryl ring having 6 to 30 carbon atoms can be used, an aryl ring having 6 to 16 carbon atoms is preferred, an aryl ring having 6 to 12 carbon atoms is more preferred, and an aryl ring having 6 to 10 carbon atoms is particularly preferred. Specific examples of “aryl rings” include the monocyclic benzene ring, the dicyclic biphenyl ring, the condensed dicyclic naphthalene ring, the 5,6,7,8-tetrahydronaphthalene ring, and the indene ring, the tricyclic terphenyl ring (m-terphenyl, o-terphenyl, p-terphenyl), the condensed tricyclic acenaphtylene ring, fluorene ring, phenalene ring, phenanthrene ring, and anthracene ring, the condensed tetracyclic triphenylene ring, pyrene ring, naphthacene ring, and chrysene ring, and the condensed pentacyclic perylene ring and pentacene ring. Additionally, the fluorene ring, benzofluorene ring, and indene ring each include structures in which the fluorene ring, benzofluorene ring, and cyclopentane ring are spiro-bonded. In addition, the tetrahydronaphthalene ring, fluorene ring, benzofluorene ring, and indene ring are each formed by substituting two of the two hydrogens of methylene with an alkyl group such as methyl as a first substituent described later, thereby forming a 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene ring, dimethylfluorene ring, dimethylbenzofluorene ring, and dimethylindene ring. As for the “heteroaryl ring” which is the A ring and B ring of formula (1), for example, a heteroaryl ring having 2 to 30 carbon atoms may be used, a heteroaryl ring having 2 to 25 carbon atoms may be used, a heteroaryl ring having 2 to 20 carbon atoms may be used more preferably, a heteroaryl ring having 2 to 15 carbon atoms may be used even more preferably, and a heteroaryl ring having 2 to 10 carbon atoms may be used particularly preferably. Additionally, as for the “heteroaryl ring,” for example, a complex ring containing 1 to 5 hetero atoms selected from oxygen, sulfur, and nitrogen in addition to carbon as ring constituent atoms may be used. Specific "heteroaryl rings" include, for example, the pyrrole ring, oxazole ring, isooxazole ring, thiazole ring, isothiaazole ring, imidazole ring, oxadiazole ring, thiadiazole ring, triazole ring, tetrazole ring, pyrazol ring, pyridine ring, pyrimidine ring, pyridazine ring, pyrazine ring, triazine ring, indole ring, isoindole ring, 1H-indazole ring, benzimidazole ring, benzoxazole ring, benzothiaazole ring, 1H-benzotriazole ring, quinoline ring, isoquinoline ring, cinnoline ring, quinazolin ring, quinoxaline ring, phthalazine ring, naphthiridine ring, purine ring, pteridine ring, carbazole ring, acridine ring, phenothiazine ring, phenazine ring, phenazacillin ring, indolezine ring, furan ring, Examples include benzofuran rings, isobenzofuran rings, dibenzofuran rings, thiophene rings, benzothiophene rings, dibenzothiophene rings, furazane rings, thianthrene rings, indolocarbazole rings, benzoindolocarbazole rings, benzobenzodolocarbazole rings, naphthobenzofuran rings, dioxin rings, dihydroacridine rings, xanthene rings, thioxanthene rings, dibenzodioxin rings, etc. In addition, it is also preferable that the dihydroacridine rings, xanthene rings, and thioxanthene rings are formed by substituting two of the two hydrogens of methylene with an alkyl group such as methyl as a first substituent described later, thereby forming dimethyldihydroacridine rings, dimethylxanthene rings, dimethylthioxanthene rings, etc. In addition, the dicyclic bipyridin ring, phenylpyridin ring, pyridylphenyl ring, and the tricyclic terpyridyl ring, bipyridylphenyl ring, and pyridylbiphenyl ring can also be cited as “heteroaryl rings.” Furthermore, the “heteroaryl ring” is also considered to include the pyran ring. In addition, as a heteroaryl ring, a ring represented by the following formula (BO) can also be cited. As described below, among the structures consisting of one or more structural units represented by formula (1), it is preferable that ring A be a substituted or unsubstituted aryl ring (e.g., benzene ring), and ring B be a substituted or unsubstituted aryl ring (e.g., benzene ring) or a ring represented by formula (b) described below. At least one hydrogen in the above “aryl ring” or “heteroaryl ring” may be substituted with a first substituent, which is a substituted or unsubstituted “aryl,” a substituted or unsubstituted “heteroaryl,” a substituted or unsubstituted “diheteroarylamino,” a substituted or unsubstituted “arylheteroarylamino,” a substituted or unsubstituted “diarylboryl (the two aryls may be connected via a single bond or a linker),” a substituted or unsubstituted “alkyl,” a substituted or unsubstituted “cycloalkyl,” a substituted or unsubstituted “alkoxy,” a substituted or unsubstituted “arylthio,” a substituted or unsubstituted “alkenyl,” or a substituted “silyl,” and the aryl of the “aryl,” “heteroaryl,” or “diarylamino” as the first substituent Examples of heteroaryl groups of “diheteroarylamino,” aryl and heteroaryl of “arylheteroarylamino,” aryl of “dialylboryl,” aryl of “aryloxy,” and “aryltio”aryl include the monovalent groups of the “aryl ring” or “heteroaryl ring” described above. Specifically, as for “aryl,” for example, an aryl having 6 to 30 carbon atoms can be cited, an aryl having 6 to 24 carbon atoms is preferred, an aryl having 6 to 20 carbon atoms is more preferred, an aryl having 6 to 18 carbon atoms is more preferred, an aryl having 6 to 12 carbon atoms is particularly preferred, and an aryl having 6 to 10 carbon atoms is most preferred. Specific aryls include, for example, the monocyclic aryl phenyl, the dicyclic aryl (2-,3-,4-)biphenylyl, the condensed dicyclic aryls (1-,2-)naphthyl, (1-,2-)5,6,7,8-tetrahydronaphthyl, (2-,3-,4-,5-,6-,7-)denyl, and the tricyclic aryl terphenylyl (m-terphenyl-2'-yl, m-terphenyl-4'-yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o-terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2-yl, m-terphenyl-3-yl, m-terphenyl-4-yl, o-terphenyl-2-yl, o-terphenyl-3-yl, o-terphenyl-4-yl, p-terphenyl-2-yl, p-terphenyl-3-yl, p-terphenyl-4-yl), condensed tricyclic aryl anthracene-(1-,2-,3-,4-,5-,6-,7-,8-,9-,10-yl, acenaphthylene-(1-,3-,4-,5-)yl, fluorene-(1-,2-,3-,4-,9-)yl, phenalene-(1-,2-)yl, (1-,2-,3-,4-,9-)phenanthrile, tetracyclic aryl quadrphenylyl(5'-phenyl-m-terphenyl-2-yl, 5'-phenyl-m-terphenyl-3-yl, 5'-phenyl-m-terphenyl-4-yl, m-quaternphenylyl), condensed tetracyclic aryl triphenylene-(1-,2-)yl, pyrene-(1-,2-,4-)yl, Examples include naphthacene-(1-,2-,5-)day, condensed pentary aryls perylene-(1-,2-,3-)day, pentacene-(1-,2-,5-,6-)day, etc. In addition, as a “heteroaryl,” examples include heteroaryls having 2 to 30 carbon atoms, heteroaryls having 2 to 25 carbon atoms are preferred, heteroaryls having 2 to 20 carbon atoms are more preferred, heteroaryls having 2 to 15 carbon atoms are even more preferred, and heteroaryls having 2 to 10 carbon atoms are particularly preferred. In addition, as a heteroaryl, examples include a heterocyclic ring containing 1 to 5 heteroatoms selected from oxygen, sulfur, and nitrogen in addition to carbon as ring-forming atoms. Specific heteroaryls include, for example, furil, thienyl, pyrrolyl, oxazolyl, isooxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, isobenzofuranyl, dibenzofuranyl, benzo[b]thienyl, dibenzothienyl, indolyl, isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naftiridinyl, furinyl, Examples include pteridinyl, carbazolyl, acrridinyl, phenoxazinil, phenothiazinil, phenazinil, phenoxatininil, thiantrenil, indolidinil, etc. In addition, as the "alkyl" as the first substituent, it may be either a straight chain or a branched chain, and for example, a straight-chain alkyl having 1 to 24 carbon atoms or a branched-chain alkyl having 3 to 24 carbon atoms may be used. An alkyl having 1 to 18 carbon atoms (a branched-chain alkyl having 3 to 18 carbon atoms) is preferred, an alkyl having 1 to 12 carbon atoms (a branched-chain alkyl having 3 to 12 carbon atoms) is more preferred, an alkyl having 1 to 8 carbon atoms (a branched-chain alkyl having 3 to 8 carbon atoms) is even more preferred, an alkyl having 1 to 6 carbon atoms (a branched-chain alkyl having 3 to 6 carbon atoms) is particularly preferred, and an alkyl having 1 to 5 carbon atoms (a branched-chain alkyl having 3 to 5 carbon atoms) is most preferred. Specific alkyls include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl(t-amyl), n-hexyl, 1-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl(1,1,3,3-tetramethylbutyl), 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl, n-dodecyl, n-tridecyl, 1-hexylheptyl, Examples include n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, n-eicosyl, etc. In addition, for example, 1-ethyl-1-methylpropyl, 1,1-diethylpropyl, 1,1-dimethylbutyl, 1-ethyl-1-methylbutyl, 1,1,4-trimethylpentyl, 1,1,2-trimethylpropyl, 1,1-dimethyloctyl, 1,1-dimethylpentyl, 1,1-dimethylheptyl, 1,1,5-trimethylhexyl, 1-ethyl-1-methylhexyl, 1-ethyl-1,3-dimethylbutyl, 1,1,2,2-tetramethylpropyl, 1-butyl-1-methylpentyl, 1,1-diethylbutyl, 1-ethyl-1-methylpentyl, 1,1,3-trimethylbutyl, 1-propyl-1-methylpentyl, 1,1,2-trimethylpropyl, 1-ethyl-1,2,2-trimethylpropyl, 1-propyl-1-methylbutyl, 1,1- Dimethylhexyl, etc., can also be mentioned. As a substituent containing the above "alkyl," the tertiaryalkyl represented by the following formula (tR) is one of the particularly preferred substituents when at least one hydrogen in the above aryl ring or heteroaryl ring is substituted by the substituent. This is because the luminescence quantum yield (PLQY) is improved as the intermolecular distance increases due to such a bulky substituent. In addition, a substituent in which the tertiaryalkyl represented by the formula (tR) is substituted by another substituent as a second substituent is also preferred. Specifically, examples include a diarylamino substituted by the tertiaryalkyl represented by the formula (tR), a carbazolyl substituted by the tertiaryalkyl represented by the formula (tR) (preferably N-carbazolyl), or a benzocarbazolyl substituted by the tertiaryalkyl represented by the formula (tR) (preferably N-benzocarbazolyl). Regarding the "diarylamino," the group described as the "first substituent" below may be used. Examples of substitution forms of the group of formula (tR) in diarylamino, carbazolyl, and benzocarbazolyl include cases where some or all hydrogens of the aryl ring or benzene ring in these groups are substituted with the group of formula (tR). In equation (tR), R a , R b , and R c Each is independently an alkyl having 1 to 24 carbon atoms, and any -CH2- in the alkyl may be substituted with -O-, and the group represented by formula (tR) is substituted with at least one hydrogen in the compound or structure represented by formula (1) in *. R a , R b and R cAs for the “alkyl having 1 to 24 carbon atoms,” either a straight chain or a branched chain may be used, for example, a straight chain alkyl having 1 to 24 carbon atoms or a branched chain alkyl having 3 to 24 carbon atoms, an alkyl having 1 to 18 carbon atoms (a branched chain alkyl having 3 to 18 carbon atoms), an alkyl having 1 to 12 carbon atoms (a branched chain alkyl having 3 to 12 carbon atoms), an alkyl having 1 to 6 carbon atoms (a branched chain alkyl having 3 to 6 carbon atoms), or an alkyl having 1 to 4 carbon atoms (a branched chain alkyl having 3 to 4 carbon atoms). R in equation (tR) a , R b , and R c The total number of carbon atoms is preferably 3 to 20, and particularly preferably 3 to 10. R a , R b , and R c Specific alkyls include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl, n-dodecyl, n-tridecyl, 1-hexylheptyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, Examples include n-heptadecyl, n-octadecyl, and n-eicosyl. The group represented by formula (tR) is, for example, t-butyl, t-amyl, 1-ethyl-1-methylpropyl, 1,1-diethylpropyl, 1,1-dimethylbutyl, 1-ethyl-1-methylbutyl, 1,1,3,3-tetramethylbutyl, 1,1,4-trimethylpentyl, 1,1,2-trimethylpropyl, 1,1-dimethyloctyl, 1,1-dimethylpentyl, 1,1-dimethylheptyl, 1,1,5-trimethylhexyl, 1-ethyl-1-methylhexyl, 1-ethyl-1,3-dimethylbutyl, 1,1,2,2-tetramethylpropyl, 1-butyl-1-methylpentyl, 1,1-diethylbutyl, 1-ethyl-1-methylpentyl, 1,1,3-trimethylbutyl, 1-propyl-1-methylpentyl, Examples include 1,1,2-trimethylpropyl, 1-ethyl-1,2,2-trimethylpropyl, 1-propyl-1-methylbutyl, 1,1-dimethylhexyl, etc. Among these, t-butyl and t-amyl are preferred. In addition, as a "cycloalkyl" as the first substituent, examples include cycloalkyl having 3 to 24 carbon atoms, cycloalkyl having 3 to 20 carbon atoms, cycloalkyl having 3 to 16 carbon atoms, cycloalkyl having 3 to 14 carbon atoms, cycloalkyl having 5 to 10 carbon atoms, cycloalkyl having 5 to 8 carbon atoms, cycloalkyl having 5 to 6 carbon atoms, cycloalkyl having 5 carbon atoms, etc. Specific cycloalkyls include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, and their carbon 1 to 5 alkyl (especially methyl) substituents, as well as bicyclo[1.1.0]butyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.0]pentyl, bicyclo[2.1.1]hexyl, bicyclo[3.1.0]hexyl, bicyclo[2.2.1]heptyl(norvonyl), bicyclo[2.2.2]octyl, adamantyl, diamantyl, decahydronaphthalenyl, decahydroazulenyl, etc. In addition, as the "alkoxy" as the first substituent, for example, a straight-chain alkoxy having 1 to 24 carbon atoms or a branched-chain alkoxy having 3 to 24 carbon atoms may be used. An alkoxy having 1 to 18 carbon atoms (a branched-chain alkoxy having 3 to 18 carbon atoms) is preferred, an alkoxy having 1 to 12 carbon atoms (a branched-chain alkoxy having 3 to 12 carbon atoms) is more preferred, an alkoxy having 1 to 6 carbon atoms (a branched-chain alkoxy having 3 to 6 carbon atoms) is even more preferred, and an alkoxy having 1 to 5 carbon atoms (a branched-chain alkoxy having 3 to 5 carbon atoms) is particularly preferred. Specific alkoxys include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-butoxy, t-butoxy, t-amyloxy, pentyloxy, hexyloxy, heptyloxy, octyloxy, etc. As for the alkenyl as the first substituent, for example, an alkenyl having 2 to 30 carbon atoms may be used, an alkenyl having 2 to 20 carbon atoms is preferred, an alkenyl having 2 to 10 carbon atoms is more preferred, an alkenyl having 2 to 6 carbon atoms is even more preferred, and an alkenyl having 2 to 4 carbon atoms is particularly preferred. Specific alkenyls are vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl. In addition, as the "substituted silyl" as the first substituent, examples include a silyl substituted with three substituents selected from the group consisting of alkyl, cycloalkyl, and aryl. Examples include trialkylsilyl, tricycloalkylsilyl, dialkylcycloalkylsilyl, alkyldicycloalkylsilyl, triarylsilyl, dialkylarylsilyl, and alkyldiarylsilyl. As for "trialkylsilyl," a group in which three hydrogens in the silyl group are each independently substituted with an alkyl group may be cited, and this alkyl may be the group described as the "alkyl" in the first substituent above. The alkyl preferred for substitution is an alkyl having 1 to 5 carbon atoms, and specifically, examples include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, t-amyl, etc. Specific trialkylsilyls include trimethylsilyl, triethylsilyl, tripropylsilyl, trii-propylsilyl, tributylsilyl, trisec-butylsilyl, trit-butylsilyl, trit-amylsilyl, ethyldimethylsilyl, propyldimethylsilyl, i-propyldimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, t-amyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, t-amyldiethylsilyl, methyldipropylsilyl, ethyldipropylsilyl, butyldipropylsilyl, sec-butyldipropylsilyl, t-butyldipropylsilyl, t-amyldipropylsilyl, methyldii-propylsilyl, ethyldii-propylsilyl, Examples include butyldi-i-propylsilyl, sec-butyldi-i-propylsilyl, t-butyldi-i-propylsilyl, t-amyldi-i-propylsilyl, etc. As for "tricycloalkylsilyl," a group in which three hydrogens in the silyl group are each independently substituted with a cycloalkyl group may be cited, and this cycloalkyl may be the group described as "cycloalkyl" in the first substituent above. The cycloalkyl preferred for substitution is a cycloalkyl having 5 to 10 carbon atoms, and specifically, examples include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.0]pentyl, bicyclo[2.1.1]hexyl, bicyclo[3.1.0]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, adamantyl, decahydronaphthalenyl, decahydroazulenyl, etc. Specific examples of tricycloalkylsilyls include tricyclopentylsilyl and tricyclohexylsilyl. Specific examples of dialkylcycloalkylsilyls substituted with two alkyl and one cycloalkyl groups, and alkyldicycloalkylsilyls substituted with one alkyl and two cycloalkyl groups, include silyls substituted with groups selected from the specific alkyl and cycloalkyl groups described above. Specific examples of dialkylarylsilyls substituted with two alkyl and one aryl group, alkyldiarylsilyls substituted with one alkyl and two aryl groups, and triarylsilyls substituted with three aryl groups may include silyls substituted with groups selected from the specific alkyl and aryl groups described above. Specific examples of triarylsilyls may include triphenylsilyl. In addition, regarding the "aryl" in the "dialylboryl" of the first substituent, the description of the aryl described above may be cited. Furthermore, these two aryls may be connected through a single bond or a linker (e.g., >C(-R)2, >O, >S, or >NR). Here, R in >C(-R)2 and >NR is an aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy, and R in >C(-R)2 and >NR may be further substituted with an aryl, heteroaryl, alkyl, or cycloalkyl group, and as specific examples of these groups, the description of the aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy as the first substituent described above may be cited. In addition, regarding the "aryl" in the "diarylamino" of the first substituent, the description of the aryl described above may be cited. Furthermore, these two aryls may be connected through a single bond or a linker (e.g., >C(-R)2, >O, or >S). Here, R of >C(-R)2 is an aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy, and the R of >C(-R)2 may be further substituted with an aryl, heteroaryl, alkyl, or cycloalkyl group, and as specific examples of these groups, the description of the aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy as the first substituent described above may be cited. In addition, regarding the "heteroaryl" in the "diheteroarylamino" of the first substituent, the description of the heteroaryl described above may be cited. Furthermore, these two heteroaryls may be connected through a single bond or a linker (e.g., >C(-R)2, >O, or >S). Here, R of >C(-R)2 is an aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy, and R of >C(-R)2 may be further substituted with an aryl, heteroaryl, alkyl, or cycloalkyl group, and as specific examples of these groups, the description of the aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy as the first substituent described above may be cited. In addition, regarding the "aryl" and "heteroaryl" in the "arylheteroarylamino" of the first substituent, the description of aryl and heteroaryl described above may be cited. In addition, the aryl and heteroaryl may be connected through a single bond or a linker (e.g., >C(-R)2, >O, or >S). Here, R of >C(-R)2 is aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy, and R of >C(-R)2 may be further substituted with aryl, heteroaryl, alkyl, or cycloalkyl, and as specific examples of these groups, the description of aryl, heteroaryl, diarylamino, alkyl, cycloalkyl, alkoxy, or aryloxy as the first substituent described above may be cited. The first substituent, a substituted or unsubstituted "aryl," a substituted or unsubstituted "heteroaryl," a substituted or unsubstituted "diarylamino," a substituted or unsubstituted "diheteroarylamino," a substituted or unsubstituted "diarylboryl" (the two aryls may be connected via a single bond or a linker), a substituted or unsubstituted "alkyl," a substituted or unsubstituted "cycloalkyl," a substituted or unsubstituted "alkoxy," a substituted or unsubstituted "aryloxy," a substituted or unsubstituted "arylthio," a substituted or unsubstituted "alkenyl," or a substituted "silyl," may have at least one hydrogen in these substituted or unsubstituted groups replaced by a second substituent, as described as substituted or unsubstituted. Examples of this second substituent may include a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted cycloalkyl, or a substituted silyl, and specific examples thereof may refer to the description of the monovalent group of the "aryl ring" or "heteroaryl ring" described above, and the description of the "alkyl," "cycloalkyl," or substituted "silyl" as the first substituent. In addition, among the aryl or heteroaryl as the second substituent, a structure in which at least one hydrogen therein is substituted with an aryl such as phenyl (the group described above in the specific example), an alkyl such as methyl or t-butyl (the group described above in the specific example), or a cycloalkyl such as cyclohexyl (the group described above in the specific example) is also included in the aryl or heteroaryl as the second substituent. As an example, in the case where the second substituent is a carbazolyl, a carbazolyl in which at least one hydrogen at the ninth position is substituted with an aryl such as phenyl, an alkyl such as methyl, or a cycloalkyl such as cyclohexyl is also included as a heteroaryl as the second substituent. The description of the second substituent above may also be applied to substituents referred to as "substituted or unsubstituted" that are not separately described in this specification. The emission wavelength can be adjusted by the structural steric hindrance, electron donating, and electron attracting properties of the first substituent. Preferably, it is a group represented by the following structural formula, and more preferably, methyl, t-butyl, t-amyl, t-octyl, neopentyl, adamantyl, phenyl, o-trile, p-trile, 2,4-xylyl, 2,5-xylyl, 2,6-xylyl, 2,4,6-methityl, diphenylamino, di-p-trilamino, bis(p-(t-butyl)phenyl)amino, carbazolyl, 3,6-dimethylcarbazolyl, 3,6-di-t-butylcarbazolyl, and phenoxy, and even more preferably, methyl, t-butyl, t-amyl, t-octyl, neopentyl, adamantyl, phenyl, o-trile, 2,6-xylyl, 2,4,6-methityl, diphenylamino, di-p-trilamino, These are bis(p-(t-butyl)phenyl)amino, carbazolyl, 3,6-dimethylcarbazolyl, and 3,6-di-t-butylcarbazolyl. From the perspective of ease of synthesis, a large steric hindrance is preferable for selective synthesis, and specifically, t-butyl, t-amyl, t-octyl, adamantyl, o-trile, p-trile, 2,4-xylyl, 2,5-xylyl, 2,6-xylyl, 2,4,6-methyl, di-p-trilamino, bis(p-(t-butyl)phenyl)amino, 3,6-dimethylcarbazolyl, and 3,6-di-t-butylcarbazolyl are preferred. In the following structural formula, “Me” is methyl, “tBu” is t-butyl, “tAm” is t-amyl, “tOct” is t-octyl, and * indicates the bonding position. A polycyclic aromatic compound having a structure composed of one or more structural units represented by formula (1) is preferably a structure containing at least one tertiary alkyl (t-butyl or t-amyl, etc.), neopentyl or adamantyl represented by the above-described formula (tR), and preferably contains a tertiary alkyl (t-butyl or t-amyl, etc.) represented by formula (tR). This is because the luminescence quantum yield (PLQY) is improved as the intermolecular distance increases due to these bulky substituents. In addition, diarylamino and arylheteroarylamino represented by the above-described structural formula are also preferred as substituents. As described above, among the structures consisting of one or more structural units represented by formula (1), it is preferable that the B ring be a substituted or unsubstituted aryl ring (e.g., a benzene ring) or a ring represented by the following formula (b). In equation (b), R 1b ~R 6bEach is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via a single bond or linker), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via a single bond or linker), substituted or unsubstituted diarylamino (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. For specific aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, alkoxy, aryloxy, aryltio, alkenyl, silyl, etc., refer to the description of the first substituent mentioned above, and for halogens, refer to the following description. R 1b ~R 6b For the substituent in this case of substitution, refer to the description of the second substituent mentioned above. R 1b ~R 6b R 3b It is preferable that it be a deuterium, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, or a substituted or unsubstituted cycloalkyl. R 1b ~R 6b Among them, any two adjacent ones are Y in Equation (1). 1 and becomes a bonding loss with N. For example, R 5b and R 6b Which of the two is Y 1 It directly combines with and, and the other side is NRNY2 It is desirable to directly combine with N of. X is >O, >S, >Se, >NR NX , >Si(-R IX )2, or >C(-R CX )2 and the above >NR NX R of NX , >Si(-R IX )2's R IX , or >C(-R CX )2's R CX Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl. Here, for the aryl, heteroaryl, alkyl, and cycloalkyl, one may refer to the description of the second substituent described above. >Si(-R as X IX )2, and >C(-R CX )2's 2 R IX and R CX They may combine with each other to form a ring. In equation (1), Y 1 B, P, P=O, P=S, Al, Ga, As, Si-R, respectively, independently S , or Ge-R Ge and, the above Si-R S R of S and Ge-R Ge R of Ge is a substituted or unsubstituted aryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl. Here, the groups described above may be used as the aryl, alkyl, or cycloalkyl. In particular, an aryl having 6 to 10 carbon atoms (e.g., phenyl, naphthyl, etc.), an alkyl having 1 to 5 carbon atoms (e.g., methyl, ethyl, etc.), or a cycloalkyl having 5 to 10 carbon atoms (preferably cyclohexyl or adamantyl) is preferred. Y 1 Silver, B, P, P=O, P=S, or Si-R S is desirable, and B is particularly desirable. R 1~R 3 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via a single bond or linker), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via a single bond or linker), substituted or unsubstituted diarylamino (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. For specific aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, alkoxy, aryloxy, aryltio, alkenyl, silyl, etc., refer to the description of the first substituent mentioned above, and for halogens, refer to the following description. R 1 ~R 3 For the substituent in this case of substitution, refer to the description of the second substituent mentioned above. R 2 and R 3 Silver, combined with each other, R 2 and R 3 A substituted or unsubstituted aryl ring or a substituted or unsubstituted heteroaryl ring may be formed together with the bonded benzene ring, wherein the formed aryl ring or heteroaryl ring may refer to the details described above regarding ring A and ring B. For the substituents in the case where the formed aryl ring or heteroaryl ring is substituted, the description of the second substituent described above may be referenced. R 1 ~R 3It is desirable that all of it be hydrogen. R of Equation (1) NY1 and R NY2 R is, each independently, hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, or a substituted or unsubstituted cycloalkyl. NY1 and R NY2 For aryl, heteroaryl, alkyl, diarylamino, and cycloalkyl groups in R, refer to their descriptions as the first substituents above. NY1 and R NY2 As for the substituents in the case where is substituted, one may refer to the description of the first and second substituents described above. R NY1 and R NY2 It is preferable that it be a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, or a substituted or unsubstituted cycloalkyl, more preferable that it be a substituted or unsubstituted aryl or a substituted or unsubstituted heteroaryl, and particularly preferable that it be a substituted or unsubstituted aryl. Here, as an aryl, phenyl, biphenylyl (particularly 2-biphenylyl), and terphenylyl (particularly terphenyl-2'-yl) are preferred, and as a heteroaryl, benzothienyl (2-benzothienyl, 6-benzothienyl etc.), benzofuranyl (2-benzofuranyl, 3-benzofuranyl, 5-benzofuranyl etc.), dibenzofunaryl (4-dibenzofunaryl etc.), dimethylxanthenyl (2-dimethylxanthenyl etc.), dibenzodioxynyl, etc. are preferred. As substituents, tertiary alkyl (particularly t-butyl) or cycloalkyl (particularly adamantyl) represented by the above formula (tR) is preferred. The number of substituents in the aryl and heteroaryl is preferably 0 to 2, more preferably 1 or 2, and even more preferably 1. It is also preferable that the aryl ring in the above aryl is condensed into a substituted or unsubstituted cycloalkane as described below. Specific cycloalkanes may be referenced to those described below. R NY1 and R NY2 Particularly preferred examples include aryls (which may be substituted) condensed with substituted or unsubstituted phenyls, substituted or unsubstituted 2-biphenylyls, substituted or unsubstituted terphenyl-2'-yls, substituted or unsubstituted terphenyl-4'-yls, and cycloalkanes. As for substituted or unsubstituted phenyls, substituted or unsubstituted 2-biphenylyls, substituted or unsubstituted terphenyl-2'-yls, and substituted or unsubstituted terphenyl-4'-yls, forms substituted with 1 to 3 t-butyls are preferred. As for aryls condensed with cycloalkanes, the following are particularly preferred. (In the formula, Me is methyl, tBu is t-butyl, and * indicates the bonding position.) In equation (1), R NY1 and R NY2 At least one of them has a group represented by the following formula (a). Among equation (a), * is the bonding position with N. A 1It is silver, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other through a linker or single bond), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other through a linker or single bond), substituted or unsubstituted diarylamino (two aryls may be connected to each other through a linker or single bond), substituted or unsubstituted diarylboryl (two aryls may be connected to each other through a linker or single bond), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted silyl, alkenyl, cyano, or halogen. Here, regarding aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, aryloxy, aryltio, alkenyl, substituted silyl, etc., one may refer to the description of the first substituent described above, and regarding halogens, one may refer to the content described below. Regarding the substituent in the case of substitution, one may refer to the description of the first substituent and the second substituent described above. A 1 It is preferable that it be a substituted or unsubstituted alkyl, and particularly preferable that it be t-butyl. R 1a ~ R 4aEach is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via a single bond or linker), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via a single bond or linker), substituted or unsubstituted diarylamino (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via a single bond or linker), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted arylthio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. Here, regarding aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, aryloxy, aryltio, alkenyl, substituted silyl, etc., one may refer to the description of the first substituent described above. Regarding halogens, one may refer to the content described below. Regarding substituents in the case of substitution, one may refer to the descriptions of the first and second substituents described above. R 1a ~ R 4a R 2a It is preferable that it be a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, or a substituted or unsubstituted cycloalkyl. R 1a ~ R 4aTwo adjacent rings on a single benzene ring may be bonded to each other to form a substituted or unsubstituted aryl ring or a substituted or unsubstituted heteroaryl ring together with the benzene ring, wherein the formed aryl ring or heteroaryl ring may refer to the details described above regarding ring A and ring B. For the substituents in the case where the formed aryl ring or heteroaryl ring is substituted, the description of the first and second substituents described above may be referenced. R NY1 Eun, ring A of formula (1) and R 1 It may be coupled with at least one of them through a single coupling or a connector, and R NY2 The ring may be bonded to at least one of the A ring and the B ring of formula (1) through a single bond or a linker. Here, -O-, -S-, or -C(-R)2- is preferred as the linker. R of "-C(-R)2-" is hydrogen, alkyl, or cycloalkyl. As mentioned above, R NY1 and R NY2 At least one of them is expressed by Equation (a), and R NY1 and R NY2 It is desirable that everything be expressed as Equation (a). R NY1 and R NY2 If all are expressed as equation (a), R NY1 and R NY2 They may be the same or different from each other. More specifically, Equation (a) can be expressed as Equations (a-1) through (a-45). In equations (a-1) through (a-45), * indicates the bonding position with N. X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As, >NR Nzy R of Nzy, and >C(-R Czy )2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl. Here, for the aryl, heteroaryl, alkyl, and cycloalkyl, one may refer to the description of the second substituent described above. X y As the above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring. Me is methyl, tBu is t-butyl, tAm is t-amyl, and D is deuterium. R NY1 and R NY2 At least one of (e.g., R NY1 and R NY2 Among them, the one not represented by expression (a) is the following expression (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY -b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) and equation (R NY -e-1)~Equation(R NY -e-15) It can be a period indicated as any one of them. Equation (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY-b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) and equation (R NY -e-1)~Equation(R NY -e-15) Among them, * indicates the bonding position with N. X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As >NR Nzy R of Nzy , >C(-R Czy )2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl. Here, regarding the aryl, heteroaryl, alkyl, and cycloalkyl, one may refer to the description of the second substituent described above. The above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring. R e11 ~R e17 , R e21 ~R e27 , and R e31 ~R e37 Each is independently hydrogen, deuterium, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, a substituted or unsubstituted cycloalkyl, or a substituted silyl, wherein for the aryl, heteroaryl, alkyl, diarylamino, cycloalkyl, and substituted silyl, one may refer to the description of the first substituent described above. Ak is a substituted or unsubstituted alkyl, Me is methyl, and D is deuterium. R in Equation (1) NY1 and R NY2Either one of them has a group selected from Equation (a-4), Equation (a-9), Equation (a-10), Equation (a-13), Equation (a-14), Equation (a-19), Equation (a-20), Equation (a-29), or Equation (a-30), and the other side has Equation (R NY -e-4)~Equation(R NY It is desirable to have a group selected from -e-15). Formula (1) is preferably represented as either Formula (1-A) or Formula (1-B). Among each of Formula (1-A) and Formula (1-B), Ring A, Ring B, Ring C, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the A ring, B ring, C ring, Y in formula (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and each have the same meaning. R dA1 ~R dA7 and R dB1 ~R dB7Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. Here, regarding aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, aryloxy, aryltio, alkenyl, substituted silyl, etc., one may refer to the description of the first substituent described above. Regarding halogens, one may refer to the content described below. Regarding substituents in the case of substitution, one may refer to the descriptions of the first and second substituents described above. R dA1 ~R dA7 Among them, 2 adjacent or R dB1 ~R dB7 Two adjacent atoms may combine to form a cycloalkane, and at least one hydrogen in the cycloalkane may be substituted. Here, regarding the substituent in the case of substitution, one may refer to the description of the second substituent described above. Formula (1) is more preferably represented as any one of the following formulas (1-A-1), (1-A-2), (1-B-1), or (1-B-2). Among each of the formulas (1-A-1), (1-A-2), (1-B-1), and (1-B-2), C ring, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the C ring, Y in equation (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and have the same meaning respectively, and R dA1 ~R dA7 and R dB1 ~R dB7 R in Equation (1-A) and Equation (1-B), independently of each dA1 ~R dA7 and R dB1 ~R dB7 and each have the same meaning. X B neun, >O, >NR NZ , >C(-R CZ )2, >Si(-R IZ )2, >S, or >Se, and R NZ , R CZ , and R IZ are each independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and >C(-R CZ )2's 2 R CZ They may be bonded to each other to form rings, and >Si(-R IZ )2's 2 R IZ They may combine with each other to form a ring. R aA1 ~R aA3 , R bA1 ~R bA4 , R aB1 ~R aB3 and R bB1 ~R bB4Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. Here, regarding aryl, heteroaryl, alkyl, cycloalkyl, diheteroarylamino, arylheteroarylamino, diarylamino, diarylboryl, aryloxy, aryltio, alkenyl, substituted silyl, etc., one may refer to the description of the first substituent described above. Regarding halogens, one may refer to the content described below. Regarding substituents in the case of substitution, one may refer to the descriptions of the first and second substituents described above. The polycyclic aromatic compound of the present invention is a polycyclic aromatic compound having a structure consisting of one or more structural units represented by Formula (1). As a polycyclic aromatic compound having a structure consisting of one structural unit, examples include polycyclic aromatic compounds represented by the formula described above as structural units represented by Formula (1). As a polycyclic aromatic compound having a structure consisting of two or more structural units represented by Formula (1), examples include compounds corresponding to the polymers of polycyclic aromatic compounds represented by the formula described above as structural units represented by Formula (1). The polymers are preferably 2 to 6 polymers, more preferably 2 to 3 polymers, and particularly preferably dimers. The polymers may be in a form having multiple of the above unit structures within a single compound, may be in a form in which any ring included in the above structural unit is shared among multiple unit structures, and may also be in a form in which any ring included in the above unit structure is condensed among itself. In addition, the above unit structure may be in the form of a single bond or a multiple bond formed at a linker such as an alkylene, phenylene, or naphthylene having 1 to 3 carbon atoms. Among these, a form in which the rings are shared is preferred. In a polycyclic aromatic compound having a structure consisting of one or more structural units represented by formula (1), at least one selected from the group consisting of an aryl ring and a heteroaryl ring may be condensed into at least one cycloalkane. As for the “cycloalkanes,” cycloalkanes having 3 to 24 carbon atoms are preferred, and as more preferred examples, sequentially, cycloalkanes having 3 to 20 carbon atoms, cycloalkanes having 3 to 16 carbon atoms, cycloalkanes having 3 to 14 carbon atoms, cycloalkanes having 5 to 10 carbon atoms, cycloalkanes having 5 to 8 carbon atoms, and cycloalkanes having 5 to 6 carbon atoms can be cited. Specific cycloalkanes include cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, bicyclo[1.1.0]butane, bicyclo[1.1.1]pentane, bicyclo[2.1.0]pentane, bicyclo[2.1.1]hexane, bicyclo[3.1.0]hexane, bicyclo[2.2.1]heptane(norbonane), bicyclo[2.2.2]octane, adamantane, diamantane, decahydronaphthalene and decahydroazulene, and their carbon 1 to 5 alkyl (especially methyl) substituents, halogen (especially fluorine) substituents and deuterium substituents. Among these, for example, a structure in which at least one hydrogen is substituted at the carbon at the α-position of a cycloalkane (a carbon at a position directly bonded to the carbon at the condensation site in a cycloalkyl that condenses into an aryl ring or a heteroaryl ring) as shown in the structural formula below is preferred, a structure in which two hydrogens are substituted at the carbon at the α-position is more preferred, and a structure in which a total of four hydrogens are substituted at two carbons at the α-position is even more preferred. Examples of these substituents include alkyl (especially methyl) substituents having 1 to 5 carbon atoms, halogen (especially fluorine) substituents, and deuterium substituents. In particular, it is preferred that the structure be formed in which a partial structure represented by the following formula (B) or formula (C) is bonded to an adjacent carbon atom in an aryl ring or a heteroaryl ring. In formulas (B) and (C), Me represents methyl, and * represents the bonding position. The number of cycloalkanes condensed to one aryl ring or heteroaryl ring is preferably 1 to 3, more preferably 1 or 2, and even more preferably 1. For example, an example in which one or more cycloalkanes are condensed to one benzene ring (phenyl) is shown below. * indicates a bonding position, and the position may be any of the carbons that constitute the benzene ring and do not constitute the cycloalkane. Cycloalkanes condensed as in Formula (Cy-1-4) and Formula (Cy-2-4) may be condensed together. The same applies even if the ring (group) being condensed is an aryl ring or heteroaryl ring other than the benzene ring (phenyl), or if the cycloalkane being condensed is a cycloalkane other than cyclopentane or cyclohexane. At least one -CH2- in the cycloalkane may be substituted with -O-. For example, an example in which one or more -CH2- are substituted with -O- in a cycloalkane condensed to one benzene ring (phenyl) is shown below. The same applies even if the ring (group) being condensed is an aromatic ring or a complex aromatic ring other than the benzene ring (phenyl), or if the cycloalkane being condensed is a cycloalkane other than cyclopentane or cyclohexane. At least one hydrogen in the cycloalkane may be substituted, and examples of such substituents include aryl, heteroaryl, diarylamino, diheterorylamino, arylheterorylamino, diarylboryl (two aryls may be connected via a single bond or a linker), alkyl, cycloalkyl, alkoxy, aryloxy, substituted silyl, deuterium, cyano, or halogen, and details thereof may be referenced from the description of the first substituent above. Among these substituents, alkyl (e.g., alkyl having 1 to 6 carbon atoms), cycloalkyl (e.g., cycloalkyl having 3 to 14 carbon atoms), halogen (e.g., fluorine), and deuterium are preferred. Furthermore, when a cycloalkyl is substituted, it may be a substituted form that forms a spiro structure, and examples thereof are shown below. Each element in the polycyclic aromatic compound containing the structural unit represented by Formula (1) is included in the ratio of its abundance in nature for a plurality of naturally occurring isotopes unless otherwise specified. However, all or some of the elements in each structural formula are present in excess of their abundance in nature (for example, boron-11 ( 11 In B), it may include a heavy stable isotope in an amount of 90 atom% or more. In this specification, this is simply referred to as "substituting" with a "heavy stable isotope." More specifically, at least one hydrogen may be substituted with deuterium, and at least one nitrogen may be nitrogen-15 ( 15 It can be substituted with N), at least one sulfur can be substituted with sulfur-33 (33S), sulfur-34 (34S), or sulfur-36 (36S), and at least one oxygen is oxygen-17 ( 17 O) or Oxygen-18 ( 18 It can be substituted with O), and at least one carbon is carbon-13( 13 It can be substituted with C), and at least one boron is boron-11( 11It can be substituted with B). By substituting at least some of the elements with heavy stable isotopes, in particular at least one boron can be replaced with boron-11 ( 11 By substituting with B), it is possible to extend the lifespan of an organic electroluminescent device using a polycyclic aromatic compound containing a structural unit represented by formula (1) as a dopant. Hydrogen in a structure consisting of one or more structural units represented by formula (1) may be all or partly substituted with deuterium, cyano, or halogen. For example, in a structure consisting of one or more structural units represented by formula (1), A ring, B ring (A ring and B ring are aryl rings or heteroaryl rings), R 1 ~R 9 , Y 1 This Si-R S or Ge-R Ge R when S , R Ge (R S , R Ge is, alkyl, cycloalkyl, or aryl), and, R NY1 and R NY2 The hydrogen in the structure may be substituted with deuterium, cyano, or halogen, but among these, an embodiment in which all or some of the hydrogen in an aryl or heteroaryl is substituted with deuterium, cyano, or halogen may be cited. The halogen is fluorine, chlorine, bromine, or iodine, preferably fluorine, chlorine, or bromine, more preferably fluorine or chlorine, and fluorine is more preferred. Furthermore, from the perspective of durability, it is desirable that all or some of the hydrogen in a structure consisting of one or more structural units represented by formula (1) be deuterinized, an embodiment in which all hydrogen directly bonded to the aromatic ring is deuterinized, an embodiment in which all hydrogen is deuterinized is more preferred, and an embodiment in which all hydrogen directly bonded to the aromatic ring is deuterinized is most preferred. At least one -CH2- among the structure consisting of one or more unit structures represented by formula (1) may be substituted with -O-. Further specific examples of the polycyclic aromatic compound represented by formula (1) of the present invention include the following compounds. In the following structural formulas, “Me” represents methyl, “tBu” represents t-butyl, “tAm” represents t-amyl, and “D” represents deuterium. Meanwhile, the following structure is an example. The polycyclic aromatic compounds of the present invention may exist as enantiomers or diastereomers depending on the type of substituent, but regardless of the described structural formula, any stereoisomer in a pure form of either one, any mixture of stereoisomers, racemic bodies, etc., are all included within the scope of the present invention. A polycyclic aromatic compound having a structure consisting of one or more of the structural units represented by formula (1) can be used as a material for organic devices, for example, a material for organic electroluminescent devices, a material for organic field-effect transistors, or a material for organic thin-film solar cells. This can be used as a polymer compound formed by polymerizing a reactive compound substituted with a reactive substituent thereon as a monomer (the monomer for obtaining this polymer compound has a polymerizable substituent), a polymer crosslinked compound further formed by crosslinking the polymer compound (the polymer compound for obtaining this polymer crosslinked compound has a crosslinking substituent), or a pendant-type polymer compound formed by reacting a main chain polymer with the reactive compound (the reactive compound for obtaining this pendant-type polymer compound has a reactive substituent), or a pendant-type polymer crosslinked compound further formed by crosslinking the pendant-type polymer compound (the pendant-type polymer compound for obtaining this pendant-type polymer crosslinked compound has a crosslinking substituent). The above-described reactive substituent (including the polymerizable substituent, the crosslinkable substituent, and the reactive substituent for obtaining a pendant-type polymer, hereinafter also referred to simply as "reactive substituent") may be a substituent capable of increasing the polymeric molecular weight of the above-described polycyclic aromatic compound, a substituent capable of further crosslinking the polymer compound obtained thereby, and a substituent capable of undergoing a pendant reaction with a main-chain polymer. Examples are not particularly limited, but include unsaturated alkenyl, alkynyl, and cycloalkyl groups (e.g., cyclobutenyl), a group in which at least one -CH2- in a cycloalkyl group is substituted with -O- (e.g., epoxy), and unsaturated condensed cycloalkanes (e.g., condensed cyclobutene). Substituents having the following structures are preferred. * in each structural formula indicates the bonding position. L is, respectively, a single bond, -O-, -S-, >C=O, -OC(=O)-, an alkylene having 1 to 12 carbon atoms, an oxyalkylene having 1 to 12 carbon atoms, and a polyoxyalkylene having 1 to 12 carbon atoms. Among the above substituents, a group represented by formula (XLS-1), formula (XLS-2), formula (XLS-3), formula (XLS-9), formula (XLS-10), or formula (XLS-17) is preferred, and a group represented by formula (XLS-1), formula (XLS-3), or formula (XLS-17) is more preferred. Details regarding the uses of such polymer compounds, polymer crosslinkers, pendant-type polymer compounds, and pendant-type polymer crosslinkers (hereinafter also simply referred to as "polymer compounds and polymer crosslinkers") will be described later. Method for preparing polycyclic aromatic compounds A polycyclic aromatic compound having a structure composed of one or more of the structural units represented by formula (1) basically has, as previously described below, an A ring, a B ring, and a C ring (a benzene ring substituted with an amino group) as connecting groups (NR NY1 Ina NR NY2An intermediate is prepared by combining the A ring, B ring, and C ring (benzene ring substituted with an amino group) with a group (Y 1 A final product can be prepared by combining with a group (including) (second reaction). In the first reaction, for example, if it is an etherification reaction, a general reaction such as a globular substitution reaction or a Ullman reaction can be used, and if it is an amination reaction, a general reaction such as a Birchwald-Hartwick reaction can be used. In addition, in the second reaction, a tandem hetero-Friedel-Crafts reaction (a successive aromatic globular substitution reaction, hereinafter the same) can be used. A compound having a ring represented by Formula (1) can be prepared by using a raw material having a desired condensed ring at some point in the reaction process or by adding a process to condense the ring. Manufacturing method via intermediate-1 The polycyclic aromatic compounds of the present invention can be prepared by a manufacturing method comprising the following processes. For each of the following processes, reference may be made to the description in International Publication No. 2015 / 102118. The above manufacturing method uses an organic alkali compound to produce NR in the following intermediate-1. NY1 and NR NY2 A reaction process for metallizing the halogen atom (Hal) between and Y 1 halides of, Y 1 Aminated halide of, Y 1 alkoxyhydrates of and Y 1 Using a reagent selected from the group consisting of aryloxy compounds of the metal and Y 1 A reaction process for exchanging and a successive aromatic electron substitution reaction using a Brønsted base, wherein the above Y 1 It includes a reaction process that combines the B ring and the C ring. Manufacturing method via intermediate-2 The polycyclic aromatic compound of the present invention is also preferably prepared by a manufacturing method comprising a reaction process in which an acid is applied to the following intermediate-2. For details, reference may be made to the description in Japanese Patent Publication No. 2018-76281, etc. Z in intermediate-2 is -B(OH)2, which may be esterified. Preferred Y 1 -B(OH)2 is an esterified group. The esterified group (-B(OR)2) of -B(OH)2 is not particularly limited and, for example, may be an alcohol including a diol or a group obtained by the reaction of a carboxylic acid with a boronic acid. As for the R of -B(OH)2, alkyl groups having 1 to 4 carbon atoms (branched alkyl groups having 3 to 4 carbon atoms) may be substituted, and the R groups may be bonded to form a ring, or an aromatic ring such as benzene may be included in the formed ring. Specifically, the following structural groups may be used. In the following structures, "Me" represents methyl, "Et" represents ethyl, "iPr" represents isopropyl, and * indicates the bonding position. For details regarding the method for preparing boronic acid or boronic acid esters such as intermediate-2, refer to Japanese Patent Publication No. 2018-76281. 2. Organic Devices The polycyclic aromatic compound according to the present invention can be used as a material for organic devices. Examples of organic devices include organic electroluminescent devices, organic field-effect transistors, or organic thin-film solar cells. 2-1. Organic Electroluminescent Devices 2-1-1. Structure of Organic Electroluminescent Devices Figure 1 is a schematic cross-sectional view showing an example of an organic EL device. The organic EL element (100) shown in FIG. 1 has a substrate (101), an anode (102) installed on the substrate (101), a hole injection layer (103) installed on the anode (102), a hole transport layer (104) installed on the hole injection layer (103), a light-emitting layer (105) installed on the hole transport layer (104), an electron transport layer (106) installed on the light-emitting layer (105), an electron injection layer (107) installed on the electron transport layer (106), and a cathode (108) installed on the electron injection layer (107). Additionally, the organic EL element (100) may be configured such that, for example, the manufacturing order is reversed, it comprises a substrate (101), a cathode (108) installed on the substrate (101), an electron injection layer (107) installed on the cathode (108), an electron transport layer (106) installed on the electron injection layer (107), a light-emitting layer (105) installed on the electron transport layer (106), a hole transport layer (104) installed on the light-emitting layer (105), a hole injection layer (103) installed on the hole transport layer (104), and an anode (102) installed on the hole injection layer (103). It is not necessary to omit all of the above layers, and the minimum constituent unit is configured to consist of an anode (102), a light-emitting layer (105), and a cathode (108), and the hole injection layer (103), hole transport layer (104), electron transport layer (106), and electron injection layer (107) are layers that are optionally installed. In addition, each of the above layers may consist of a single layer or multiple layers. As for the embodiments of the layers constituting the organic EL device, in addition to the aforementioned configuration of “substrate / anode / hole injection layer / hole transport layer / emissive layer / electron transport layer / electron injection layer / cathode,” there are “substrate / anode / hole transport layer / emissive layer / electron transport layer / electron injection layer / cathode,” “substrate / anode / hole injection layer / emissive layer / electron transport layer / electron injection layer / cathode,” “substrate / anode / hole injection layer / hole transport layer / emissive layer / electron injection layer / cathode,” “substrate / anode / hole injection layer / hole transport layer / emissive layer / electron transport layer / cathode,” “substrate / anode / emissive layer / electron transport layer / electron injection layer / cathode,” “substrate / anode / emissive layer / electron transport layer / electron injection layer / cathode,” It may be a configuration mode of “substrate / anode / hole transport layer / emissive layer / electron transport layer / cathode”, “substrate / anode / hole injection layer / emissive layer / electron injection layer / cathode”, “substrate / anode / hole injection layer / emissive layer / electron transport layer / cathode”, “substrate / anode / emissive layer / electron transport layer / cathode”, or “substrate / anode / emissive layer / electron injection layer / cathode”. 2-1-2. Emitting layer in an organic electroluminescent device The polycyclic aromatic compound of the present invention is preferably used as a material for forming any one or more organic layers in an organic electroluminescent device, and more preferably as a material for forming a light-emitting layer. The light-emitting layer (105) is a layer that emits light by recombining holes injected from the anode (102) and electrons injected from the cathode (108) between electrodes to which an electric field is applied. As for the material forming the light-emitting layer (105), it is preferable to use a compound (luminescent compound) that is excited and emits light by recombination of holes and electrons, can form a stable thin film shape, and at the same time exhibits strong light emission (fluorescence) efficiency in a solid state. The light-emitting layer may be a single layer or multiple layers, and is formed by a material for the light-emitting layer (host material, dopant material). The host material and the dopant material may each be of a single type or a combination of multiple types. The dopant material may be entirely contained in the host material or partially contained in it. As for the doping method, it can be formed by a co-deposition method with the host material, but it may also be mixed with the host material in advance and then deposited simultaneously. The amount of host material used varies depending on the type of host material and should be determined according to the characteristics of that host material. The standard amount of host material used is preferably 50 to 99.999 mass% of the total mass of the material for the emissive layer, more preferably 80 to 99.95 mass%, and even more preferably 90 to 99.9 mass%. When the host material is a combination of a hole-transporting host material and an electron-transporting host material, the amount of host material used is a mass that matches the amount of the hole-transporting host material and the amount of the electron-transporting host material. The ratio of the amounts of the hole-transporting host material and the electron-transporting host material used should be 1:9 to 9:1 in mass ratio, preferably 4:6 to 6:4, and more preferably approximately 1:1. The amount of dopant material used varies depending on the type of dopant material and should be determined according to the characteristics of the dopant material. The standard amount of dopant used is preferably 0.001 to 50 mass% of the total mass of the material for the light-emitting layer, more preferably 0.05 to 20 mass%, and even more preferably 0.1 to 10 mass%. The above range is desirable, for example, in that it can prevent the concentration quenching phenomenon. As the dopant material, imitating dopant and assisting dopant materials may be used. As the assisting dopant material, both thermally activated delayed fluorescence materials and phosphorescent materials may be preferably used. In an organic electroluminescent device using an assisting dopant material, it is preferable that the amount of imitating dopant material used be low in order to prevent concentration quenching. It is preferable that the amount of assisting dopant material used be high in terms of the efficiency of the thermally activated delayed fluorescence mechanism. Furthermore, in an organic electroluminescent device using a thermally activated delayed fluorescence assisting dopant material, it is preferable that the amount of imitating dopant material used be low compared to the amount of assisting dopant material in terms of the efficiency of the thermally activated delayed fluorescence mechanism of the assisting dopant material. In the case where an assisting dopant material is used, the amounts of the host material, the assisting dopant material, and the imitating dopant material are, respectively, 40 to 99 mass%, 59 to 1 mass%, and 20 to 0.001 mass% with respect to the total mass of the material for the light-emitting layer, and preferably, 60 to 95 mass%, 39 to 5 mass%, and 10 to 0.01 mass%, respectively, and more preferably, 70 to 90 mass%, 29 to 10 mass%, and 5 to 0.05 mass%. The polycyclic aromatic compound of the present invention is more preferably used as a material for forming a light-emitting layer, and particularly more preferably as a dopant. A polycyclic aromatic compound containing a structural unit represented by formula (1) can be used as an imitation dopant for a TTF device that utilizes the phenomenon in which a singlet exciton is generated from a plurality of triplet excitons (triplet-triplet fusion (TTF)). The polycyclic aromatic compound of the present invention may be used as a “thermally activated delayed fluorescence” and as an imitation dopant for an organic EL device (hereinafter referred to as a “TADF device”) that exhibits thermally activated delayed fluorescence (TADF). In the “thermally activated delayed fluorescence,” by reducing the energy difference between the least excited singlet state and the least excited triplet state, the cross-transition between the least excited triplet state, which normally has a low transition probability, to the least excited singlet state is generated with high efficiency, and luminescence from the singlet (thermally activated delayed fluorescence, TADF) is expressed. In normal fluorescence emission, 75% of the triplet excitons generated by current excitation pass through the thermal deactivation path and cannot be extracted as fluorescence. On the other hand, in TADF, all excitons can be utilized for fluorescence emission, thereby realizing a high-efficiency organic EL device. The polycyclic aromatic compound of the present invention can be used as an imitating dopant for a "TADF device," an imitating dopant for a TADF device using two types of hosts, an imitating dopant for an organic electroluminescent device (TAF device) using a separate thermally activated delay phosphor as an assisting dopant, and an imitating dopant for an organic electroluminescent device (phosphorescent assist device) using a phosphorescent material as an assisting dopant. From the perspective that manufacturing is easier when the amount of material used in the device is small, it is preferable to use it as an imitating dopant for a TADF device or as an imitating dopant for a TADF device using two types of hosts, and the former is more preferable. From the perspective of efficiency, it is preferable to use it as an imitating dopant for a TAF device and as an imitating dopant for a phosphorescent assist device, and it is more preferable to use it as an imitating dopant for a TAF device. Generally, it is believed that a faster delayed fluorescence indicates superior TADF properties. Specifically, when a emitting material with a delayed fluorescence lifetime of 20 μsec or less is used as an imitation dopant in a emitting device, high device efficiency and a long device lifetime can be obtained. A delayed fluorescence lifetime of less than 20 μsec is preferable, 10 μsec or less is more preferable, and 5 μsec or less is most preferable. Also, generally ΔE S1T1 The smaller the value of , the better the TADF performance. Also, ΔE S1T1 is the lowest excitation singlet energy level (E S1 ) and lowest excited triplet energy level (E T1 It is the energy difference with ). Specifically, ΔE S1T1 It is preferable that the value of be 0.20 eV or less, more preferable that it be 0.15 eV or less, and particularly preferable that it be 0.10 eV or less. <Host Ingredients> Examples of host materials include condensed ring derivatives such as anthracene or pyrene, which have been known as luminescent materials; bisstyryl derivatives such as bisstyrylanthracene derivatives or distyrylbenzene derivatives; tetraphenylbutadiene derivatives; cyclopentadiene derivatives; fluorene derivatives; benzofluorene derivatives; N-phenylcarbazole derivatives; carbazonitrile derivatives; and dibenzochrisene derivatives. Additionally, from the perspective of durability, it is desirable that some or all of the hydrogen atoms of the host material are deuterinated. Furthermore, it is also desirable to form a luminescent layer by combining a host compound in which some or all of the hydrogen atoms are deuterinated and a dopant compound in which some or all of the hydrogen atoms are deuterinated. Lowest excitation triplet energy level of the host material (E T1 ) is, in terms of promoting rather than inhibiting the generation of TADF within the emissive layer, the highest E within the emissive layer T1 E of a dopant or assisting dopant havingT1 It is desirable that it be higher compared to, specifically, E of the host material T1 E of the above dopant or assisting dopant T1 Compared to, it is desirable that it be at least 0.01 eV higher, more desirable that it be at least 0.03 eV higher, and more desirable that it be at least 0.1 eV higher. In addition, the E of the host material T1 It is preferable that it be 2.70 eV or higher, more preferable that it be 2.73 eV or higher, and more preferable that it be 2.80 eV or higher. A compound that is TADF active may be used in the host material. The host material may be of a single type or a combination of multiple types. In the case of a combination of multiple types, it is preferable to have a combination of a hole-transporting host material and an electron-transporting host material. Hole transport host materials (HH) and electron transport host materials (EH) satisfy the following relationships for HOMO (Highest Occupied Molecular Orbital) and LUMO (Lowest Unoccupied Molecular Orbital). The HOMO of the hole transport host material (HH) is shallower than the HOMO of the electron transport host material (EH), and the LUMO of the electron transport host material (EH) is deeper than the LUMO of the hole transport host material (HH). In addition, it is desirable that the HOMO of the imitating dopant is shallower than the HOMO of the hole-transporting host material (HH), or that the LUMO of the imitating dopant is deeper than the LUMO of the electron-transporting host material (EH). In addition, the lowest excited triplet energy level (E) of the hole transport host material (HH) and the electron transport host material (EH) T1 ) is, in terms of promoting rather than inhibiting the generation of TADF within the emissive layer, the highest E within the emissive layer T1 E of an imitating dopant or assisting dopant havingT1 It is desirable that it be higher compared to, specifically, E of the host material T1 E of the above-mentioned imitating dopant or assisting dopant T1 Compared to, it is desirable that it be at least 0.01 eV higher, more desirable that it be at least 0.03 eV higher, and more desirable that it be at least 0.1 eV higher. In addition, the E of the host material T1 It is preferable that it be 2.47 eV or higher, more preferable that it be 2.49 eV or higher, and more preferable that it be 2.56 eV or higher. In addition, it is desirable to use a hole transport host material in the hole transport layer adjacent to the emissive layer, and also to use an electron transport host material in the electron transport layer adjacent to the emissive layer. This is because carrier leakage and energy leakage from the emissive layer to adjacent layers become difficult to occur, thereby obtaining an organic EL device with high efficiency. The host material (hole transport host material) in the emissive layer and the hole transport layer material may be the same or different. In addition, the host material (electron transport host material) in the emissive layer and the electron transport layer material may be the same or different. [Hole Transportable Host Material (HH)] Examples of desirable hole-transporting host materials (HH) include compounds having a structure represented by formula (HH-1) or having a partial structure represented by formula (HH-1) and comprising at least three rings selected from the group consisting of aryl rings and heteroaryl rings. It is preferable that these compounds do not contain any of the imine structure (-N=C-; including a partial structure of a heteroaryl ring), boron (>B-), and cyano (CN). In equation (HH-1), Q is, >O, >S, or, >NA H is, In the formula (HH-1), the carbon atom next to the carbon atom to which Q is bonded in each of the two phenyl groups may be bonded to each other by L, and L is a single bond, >O, >S, or >C(-A H )2 and, A H is hydrogen, aryl, or heteroaryl, and >C(-A H 2 A's in )2 H They may be combined with each other. When a hole-transporting host material includes a structure represented by formula (HH-1) as a substructure, it may include one such substructure, but it is also preferable to include two or more. If two or more are included, the two or more substructures may be identical or different from each other. The two or more substructures may be connected by single bonds, may be connected by sharing any ring included in the substructure, or may be connected by condensing any ring included in the substructure. The substructure may further have a substituent selected from aryl, heteroaryl, diarylamino, or aryloxy. A compound having a partial structure represented by the above formula (HH-1) or formula (HH-1) has a structure comprising at least three rings selected from the group consisting of aryl rings and heteroaryl rings. The number of rings included is preferably 6 or more, and more preferably 8 or more. In addition, it is preferably 20 or less, more preferably 15 or less, and more preferably 10 or less. The number of rings refers to the number of single rings, and for condensed rings, it is the number of single rings constituting the condensed ring. The hole-transporting host material is preferably a compound comprising one or more substructures selected from the group consisting of triarylamine structures, carbazole rings, dibenzofuran rings, dibenzothiophene rings, and condensed polycyclic compounds including phenoxazine or phenothiazine. The hole-transporting host material may comprise one such substructure, but it is also preferable to comprise two or more. In the case of comprising two or more, the two or more substructures may be identical or different from each other. Specific examples of hole-transporting host materials include the following compounds. Among the above, HH-1-1, HH-1-2, HH-1-4~HH-1-12, HH-1-17, HH-1-18, HH-1-20~HH-1-24, HH-1-82, HH-1-84~HH-1-89, HH-1-91, HH-1-92, HH-1-106~HH-1-108, and HH-1-109~HH-1-115 are preferred. [Electronic Transport Host Material (EH)] Examples of electron transportable host materials (EH) include compounds having a structure comprising at least three rings selected from the group consisting of aryl rings and heteroaryl rings, which are represented by formulas (EH-1A) to (EH-1D) or have a partial structure represented by formulas (EH-1A) to (EH-1D). In equations (EH-1A) to (EH-1D), Ar is a heteroaryl ring containing N=C as a ring-constituting substructure, and Z is a single bond, -O-, -S-, or -N(-A E )-and, The carbon atom next to the carbon atom to which Z bonds, and A to which Z bonds E and may be combined with each other as L, and L is a single bond, >O, >S, or >C(-A E )2 and, A E is an aryl, heteroaryl, or triarylsilyl, and in formula (EH-1C), any one A E It can be a diarylamino, and Two A's bonding to the same atom E They may be combined with each other as L, and X is C, P, or S, and When X is C, n=2, m=1, and When X is P, n=3, m=1, and When X is S, n=2, m=1~2. A compound having a partial structure represented by the above formulas (EH-1A) to (EH-1D) or formulas (EH-1A) to (EH-1D) has a structure comprising at least three rings selected from the group consisting of aryl rings and heteroaryl rings. The number of rings included is preferably 4 or more, more preferably 6 or more, and more preferably 8 or more. Additionally, it is preferably 20 or less, more preferably 15 or less, and more preferably 10 or less. The number of rings refers to the number of single rings, and for condensed rings, it is the number of single rings constituting the condensed ring. When an electron-transporting host material includes structures represented by formulas (EH-1A) to (EH-1D) as substructures, it may include one such substructure, but it is also preferable to include two or more. If two or more are included, the two or more substructures may be identical or different from each other. The two or more substructures may be connected by single bonds, may be connected by sharing any ring included in the substructure, or may be connected by condensing any ring included in the substructure. The substructure may further have a substituent selected from aryl, heteroaryl, diarylamino, or aryloxy. Specific examples of electron transportable host materials include the following compounds. As another preferred example of an electron transportable host material (a compound having a partial structure represented by formula (EH-1)), a polycyclic aromatic compound represented by the following formula (EH-1b) or a polymer of a polycyclic aromatic compound having multiple structures represented by the following formula (EH-1b) may be cited. In formula (EH-1b), R 1 , R 2 , R 3 , R 4 and R 5 (Later, "R 1 (also referred to as “etc.”) are each independently hydrogens or substituents. These substituents may be selected from substituent group Z. In equation (EH-1b), X 1 and X 2 are, respectively, >NR(amine nitrogen), >O, >C(-R)2, >S, or >Se, and X 1 and X 2 There are no cases where all >C(-R)2, R in the above >NR and >C(-R)2 is, respectively, a substituent selected from hydrogen or the substituent group Z, and may be further substituted with an aryl, heteroaryl, alkyl, or cycloalkyl (the above second substituent), and R in the above >NR and >C(-R)2 may each be, respectively, bonded to at least one of the a-ring, b-ring, and c-ring by a linker or a single bond. Y 1 , Y 2 , Y 3 , Y 4 , Y 5 and Y 6 (Later, "Y 1 (also referred to as “etc.”) are each independently =C(-R)- or =N-(pyridinous nitrogen), and at least one is =N-(pyridinous nitrogen). In the above =C(-R)-, R is a substituent selected independently from hydrogen or substituent group Z. The above R 1 , R 2 , R 3 , R 4 and R 5 , and, the above Y 1 ~Y 6 Adjacent groups among the R of =C(-R)- may be bonded to form an aryl ring or a heteroaryl ring together with at least one ring among an a ring, a b ring and a c ring, and at least one hydrogen in the formed ring may be substituted with an aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, diarylboryl (two aryls may be bonded through a single bond or a linker), alkyl, cycloalkyl, alkoxy, or aryloxy (all of which are first substituents), and at least one hydrogen in these may be further substituted with an aryl, heteroaryl, alkyl, or cycloalkyl (all of which are second substituents). At least one hydrogen in the compound and structure represented by formula (EH-1b) may be substituted with cyano, halogen, or deuterium. In equation (EH-1b), R 1 , R 2 , R 3 , R 4 and R 5 are all hydrogen, or, R 3 and R 4 All of them are hydrogen, and also R 1 , R 2 and R 5It is preferable that any one or more of the substituents selected from the group consisting of hydrogen are non-hydrogen, and that the others are hydrogen. As substituents, aryl that may be substituted with alkyl, alkyl or heteroaryl, heteroaryl that may be substituted with alkyl or aryl, or diarylamino that may be substituted with alkyl or aryl are preferred. In this case, as alkyl, alkyl having 1 to 6 carbon atoms (methyl, t-butyl, etc.) is preferred; as aryl, phenyl or biphenyl is preferred; and as heteroaryl, triazinyl, carbazolyl (2-carbazolyl, 3-carbazolyl, 9-carbazolyl, etc.), pyrimidinyl, pyridinyl, dibenzofuranyl, or dibenzothienyl are preferred. Specific examples include phenyl, biphenyl, diphenyltriazinyl, carbazolyltriazinyl, monophenylpyrimidinyl, diphenylpyrimidinyl, carbazolyltriazinyl, pyridinyl, dibenzofuranyl, and dibenzothienyl. Y 1 Each of the following is independently =C(-R)- or =N-, and at least one is =N-. Y 1 ~Y 6 Any of them may be =N-. Preferably, Y 1 and Y 6 This = N - (a ring is a pyrimidine ring), Y 1 or Y 6 This = N - (a ring is a pyridine ring), Y 2 and Y 5 a = N - (b-ring and c-ring are pyridine rings), Y 3 and Y 4 a = N - (b-ring and c-ring are pyridine rings), Y 2 ~Y 5 a = N - (b and c are pyrimidine rings), Y 1 , Y 3 , Y 4 and Y 6 This = N - (a ring is a pyrimidine ring, b and c rings are pyrimidine rings), Y 1 , Y 2 , Y 5 and Y 6This = N - (a ring is a pyrimidine ring, b and c rings are pyrimidine rings), Y 1 ~Y 6 This = N - (a, b, and c are pyrimidine rings), Y 2 or Y 5 g = N - (b ring or c ring is a pyridine ring). In addition, in addition to the above =N- arrangement relationship, X 1 and X 2 It is preferable that >O, and a polycyclic aromatic compound comprising a partial structure represented by any one of the following formulas is preferred. In particular, polycyclic aromatic compounds containing the partial structure represented by the formula (EH-1b-N1) have a higher E compared to structures without N. S1 , high E T1 , small ΔE S1T1 has Specific examples of polycyclic aromatic compounds represented by the formula (EH-1b) are shown below. Among the above, EH-1-1 to EH-1-4, EH-1-10, EH-1-21 to EH-1-25, EH-1-32, EH-1-33, EH-1-51 to EH-1-59, EH-1-61, EH-1-66, EH-1-68, EH-1-71, EH-1-72, EH-1-90, EH-1-94 to EH-1-99, EH-1-100, EH-1-101, EH-1-104, EH-1-115, EH-1-117, EH-1-120, EH-1-122, EH-1-123, EH-1-127 to EH-1-130 are preferred. [Combination of hole transport host materials and electron transport host materials] The combination of hole-transporting host materials and electron-transporting host materials is the HOMO, LUMO, and lowest excited triplet energy level (E) of the hole-transporting host material, electron-transporting host material, and dopant material. T1 It is selected by ). Regarding HOMO and LUMO, a combination is selected in which the HOMO (HH) of the hole-transporting host material is shallower than the HOMO (EH) of the electron-transporting host material, and the LUMO (EH) of the electron-transporting host material is deeper than the LUMO (HH) of the hole-transporting host material; more specifically, a combination in which HOMO (HH) is shallower than HOMO (EH) by at least 0.10 eV and LUMO (HH) is deeper than HOMO (EH) by at least 0.10 eV is preferred, a combination in which HOMO (HH) is shallower than HOMO (EH) by at least 0.20 eV and LUMO (HH) is deeper than HOMO (EH) by at least 0.20 eV is more preferred, and a combination in which HOMO (HH) is shallower than HOMO (EH) by at least 0.25 eV and LUMO (HH) is deeper than HOMO (EH) A combination deeper than 0.25 eV is more desirable. The hole transport host material and the electron transport host material may be a combination that forms an association called an exciplex. It is generally known that an exciplex is easily formed between a material having a relatively deep LUMO level and a material having a shallow HOMO level. The interaction between the hole transport host material and the electron transport host material, specifically whether an exciplex is formed, can be determined by forming a monolayer film consisting only of the hole transport host material and the electron transport host material under the same conditions as the formation of the emissive layer, measuring the emission spectrum (fluorescence, phosphorescence spectrum), and comparing the obtained emission spectrum with the emission spectra exhibited by the hole transport host material and the electron transport host material individually. This can be determined by the fact that the spectrum of the mixed film containing the hole transport host material and the electron transport host material exhibits an emission wavelength different from either the film spectrum of the hole transport host material or the film spectrum of the electron transport host material. Specifically, an indicator that the peak wavelength of the spectrum differs by 10 nm or more may be used. Specific examples of combinations of hole-transporting host materials and electron-transporting host materials that do not form exciflex include the following combinations. The above HOMO, LUMO, and E T1In order to satisfy the physical property values, for a hole transport host material, a compound having carbazole, dibenzofuran, dibenzothiophene, triarylamine, indolocarbazole, and benzoxazinophenoxazine as partial structures is preferred, a compound having carbazole, dibenzofuran, and dibenzothiophene as partial structures is more preferred, and a compound having carbazole as a partial structure is even more preferred. Likewise, for an electron transport host material, a compound having pyridine, triazine, phosphine oxide, benzopyridine, and dibenzoxacillin as partial structures is preferred, a compound having triazine, phosphine oxide, benzopyridine, and dibenzoxacillin as partial structures is more preferred, and a compound having triazine is even more preferred. More specifically, the hole transport host material is preferably selected from the group consisting of HH-1-1, HH-1-2, HH-1-4 to HH-1-12, HH-1-17, HH-1-18, HH-1-20 to HH-1-24, HH-1-82, HH-1-84 to HH-1-89, HH-1-91, HH-1-92, and HH-1-106 to HH-1-108, and the electron transport host material is preferably selected from the group consisting of EH-1-1 to EH-1-4, EH-1-10, EH-1-21 to EH-1-25, EH-1-32, EH-1-33, EH-1-51 to EH-1-59, EH-1-61, EH-1-71, EH-1-72, It is preferable to select from the group consisting of EH-1-90, EH-1-100, EH-1-101, EH-1-104, EH-1-117, EH-1-120, EH-1-122, EH-1-123, and EH-1-127 to EH-1-130. Preferred examples of combinations include compound HH-1-1 and compound EH-1-22, compound HH-1-1 and compound EH-1-23, compound HH-1-1 and compound EH-1-24, compound HH-1-2 and compound EH-1-22, compound HH-1-2 and compound EH-1-23, compound HH-1-2 and compound EH-1-24, or compound HH-1-1 and compound EH-1-128. Specific examples of the combination of a hole-transporting host material and an electron-transporting host material forming an exiplex include the following combinations. The above, HOMO, LUMO, and E T1In order to satisfy the physical property values, for a hole transport host material, a compound having carbazole, triarylamine, indolocarbazole, and benzoxazinofenoxazine as partial structures is preferred, a compound having triarylamine, indolocarbazole, and benzoxazinofenoxazine as partial structures is more preferred, and a compound having triarylamine as partial structures is even more preferred. Likewise, for an electron transport host material, a compound having pyridine, triazine, phosphine oxide, and benzopyridine as partial structures is preferred, a compound having triazine, phosphine oxide, benzopyridine, and dibenzoxacillin as partial structures is more preferred, and a compound having phosphine oxide and triazine is even more preferred. More specifically, the hole transport host material is preferably selected from the group consisting of HH-1-1, HH-1-2, HH-1-11, HH-1-12, HH-1-17, HH-1-18, HH-1-23, HH-1-24, and HH-1-115, and the electron transport host material is preferably selected from the group consisting of EH-1-1~EH-1-4, EH-1-21~EH-1-25, EH-1-51~EH-1-57, EH-1-59, EH-1-66, EH-1-68, EH-1-90, EH-1-94, EH-1-99, EH-1-100, EH-1-101, EH-1-104, EH-1-117, EH-1-120, It is preferable to select from the group consisting of EH-1-122, EH-1-123, and EH-1-127 to EH-1-130. Preferred examples of combinations include compound HH-1-1 and compound EH-1-21, compound HH-1-2 and compound EH-1-21, compound HH-1-12 and compound EH-1-94, compound HH-1-12 and compound EH-1-117, compound HH-1-1 and compound EH-1-130, compound HH-1-33 and compound EH-1-117, compound HH-1-48 and compound EH-1-117, compound HH-1-49 and compound EH-1-117, or compound HH-1-115 and compound EH-1-99. Furthermore, regarding specific combinations of hole-transporting host materials and electron-transporting host materials, see Organic Electronics 66(2019) 227-24, Advanced Functional Materials 25(2015) 361-366, Advanced Materials 26(2014) 4730-4734, ACS Applied Materials and Interfaces 8(2016) 32984-32991, ACS Applied Materials and Interfaces 2016, 8, 9806-9810, ACS Applied Materials and Interfaces 2016, 8, 32984-32991, Journal of Materials Chemistry C, 2018, 6, 8784-8792, Angewante Chemie International Edition.2018, 57, 12380-12384, Advanced Functional Materials, You may refer to the descriptions in 24, 2014, 3970, Advanced Materials, 26, 2014, 5684, Synthetic Metals, 201, 2015, 49, and Nature Photonics, 16, 212-218 (2022). [Anthracene compounds] Examples of anthracene compounds as hosts include compounds represented by the following formula (3-H) and compounds represented by the formula (3-H2). Among the equation (3-H), X and Ar 4Each is independently hydrogen, a substituted aryl, a substituted heteroaryl, a substituted diarylamino, a substituted diheteroarylamino, a substituted arylheteroarylamino, a substituted alkyl, a substituted cycloalkyl, a substituted alkenyl, a substituted alkoxy, a substituted aryloxy, a substituted arylthio, or a substituted silyl, and all X and Ar 4 There is no case where it simultaneously becomes hydrogen, and In the compound represented by formula (3-H), at least one hydrogen may be substituted with a halogen, cyano, deuterium, or a heteroaryl that may be substituted. In addition, a polymer (preferably a dimer) may be formed using a structure represented by formula (3-H) as a unit structure. In this case, for example, a form in which unit structures represented by formula (3-H) are bonded together through X can be used, and the X can be a single bond, an arylene (phenylene, biphenylene, and naphthylene, etc.) and a heteroarylene (a group having a divalent bonding value such as a pyridine ring, dibenzofuran ring, dibenzothiophen ring, carbazole ring, benzocarbazole ring, and a phenyl-substituted carbazole ring, etc.). Details of each group in the compound represented by formula (3-H) may be described by referring to the explanation in formula (1) above, and furthermore, are described in the section on preferred embodiments below. Preferred embodiments of the above-mentioned anthracene compound are described below. The definitions of symbols in the following structures are the same as those described above. In equation (3-H), X is independently in equation (3-X 1 ), Equation(3-X 2 ) or is represented by Equation (3-X3), and Equation (3-X 1 ), Equation(3-X 2The group represented by ) or formula (3-X3) is bonded to the anthracene ring of formula (3-H) in *. Preferably, there are no cases where two Xs simultaneously become the group represented by formula (3-X3). More preferably, two Xs simultaneously become the group represented by formula (3-X 2 There are no cases where it becomes a gi displayed as ). In addition, a polymer (preferably a dimer) may be formed using a structure represented by formula (3-H) as a unit structure. In this case, for example, a form in which unit structures represented by formula (3-H) are bonded together through X can be used, and the X can be a single bond, an arylene (phenylene, biphenylene, and naphthylene, etc.) and a heteroarylene (a group having a divalent bonding value such as a pyridine ring, dibenzofuran ring, dibenzothiophen ring, carbazole ring, benzocarbazole ring, and a phenyl-substituted carbazole ring, etc.). Equation (3-X 1 ) and Equation(3-X 2 The naphthylene portion in ) may be condensed into a single benzene ring. The structure condensed in this way is as follows. Ar 1 and Ar 2 Each is independently hydrogen, phenyl, biphenyllyl, terphenyllyl, quarterphenyllyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, crisenyl, triphenylenyl, pyrenyllyl, or a group represented by formula (A) described below (including a carbazolyl group, a benzocarbazolyl group, and a phenyl-substituted carbazolyl group). Also, Ar 1 or Ar 2 In the case where is represented by the equation (A) described below, the entity represented by equation (A) is equation (3-X) in that * 1 ) or formula(3-X 2 It combines with the naphthalene ring in ). Ar 3is phenyl, biphenyllyl, terphenyllyl, quaternphenyllyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, crisenyl, triphenylenyl, pyrenyllyl, or, a group represented by formula (A) (including carbazolyl groups, benzocarbazolyl groups, and phenyl-substituted carbazolyl groups). Also, Ar 3 In the case of the group represented by this equation (A), the group represented by equation (A) is combined with the single bond represented by the straight line in equation (3-X3) in that *. That is, the anthracene ring of equation (3-H) and the group represented by equation (A) are directly combined. Also, Ar 3 It may have substituents, and Ar 3 At least one hydrogen in the above may be further substituted with an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, phenyl, biphenylyl, terphenylyl, naphthyl, phenanthyl, fluorenyl, crisenyl, triphenylenyl, pyrenylyl, or a group represented by formula (A) (including a carbazolyl group and a phenyl-substituted carbazolyl group). Additionally, Ar 3 In the case where the substituent having this is a group represented by formula (A), the group represented by formula (A) is Ar in formula (3-X3) in that * 3 Combines with. Ar 4 Each is a silyl substituted independently with hydrogen, phenyl, biphenyllyl, terphenyllyl, naphthyl, alkyl having 1 to 4 carbon atoms (methyl, ethyl, t-butyl, etc.) and / or cycloalkyl having 5 to 10 carbon atoms. Examples of alkyl groups having 1 to 4 carbon atoms substituted for silyl include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl, etc., and three hydrogens in the silyl are each independently substituted with these alkyl groups. Specifically, as “silyls substituted with alkyl groups having 1 to 4 carbon atoms,” trimethylsilyl, triethylsilyl, tripropylsilyl, trii-propylsilyl, tributylsilyl, trisec-butylsilyl, trit-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl, i-propyldimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, methyldipropylsilyl, ethyldipropylsilyl, butyldipropylsilyl, sec-butyldipropylsilyl, t-butyldipropylsilyl, methyldii-propylsilyl, ethyldii-propylsilyl, butyldii-propylsilyl, sec-butyldii-propylsilyl, Examples include t-butyldi-propylsilyl. Examples of cycloalkyl groups having 5 to 10 carbon atoms substituted on a silyl include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.0]pentyl, bicyclo[2.1.1]hexyl, bicyclo[3.1.0]hexyl, bicyclo[2.2.1]heptyl(norvonyl), bicyclo[2.2.2]octyl, adamantyl, decahydronaphthalenyl, decahydroazulenyl, etc., and three hydrogens in the silyl are each independently substituted with these cycloalkyl groups. Specific examples of “silyls substituted with cycloalkyl groups having 5 to 10 carbon atoms” include tricyclopentylsilyl and tricyclohexylsilyl. As substituted silyls, there are dialkylcycloalkylsilyls substituted with two alkyl and one cycloalkyl, and alkyldicycloalkylsilyls substituted with one alkyl and two cycloalkyls, and specific examples of the substituted alkyl and cycloalkyl groups include the groups described above. In addition, hydrogens in the chemical structure of an anthracene compound represented by formula (3-H) may be substituted with a group represented by formula (A). When substituted with a group represented by formula (A), the group represented by formula (A) substitutes with at least one hydrogen in the compound represented by formula (3-H) in that *. The group represented by formula (A) is one of the substituents that an anthracene compound represented by formula (3-H) and an anthracene compound represented by formula (3-H2) described later may have. In Equation (A), Y is -O-, -S- or >NR 29 and R 21 ~R 28 Each is independently hydrogen, a substituted alkyl, a substituted cycloalkyl, a substituted aryl, a substituted heteroaryl, a substituted alkoxy, a substituted aryloxy, a substituted arylthio, trialkylsilyl, tricycloalkylsilyl, dialkylcycloalkylsilyl, alkyldicycloalkylsilyl, a substituted amino, halogen, hydroxy, or cyano, and R 21 ~R 28 Adjacent groups among them may combine to form a hydrocarbon ring, an aryl ring, or a heteroaryl ring, and R 29 is an aryl that may be hydrogen or substituted. It is preferable that Y in equation (A) be -O-. R 21 ~R 28As for the “alkyl” of the “alkyl that may be substituted” in the above, it may be either a straight chain or a branched chain, and for example, a straight-chain alkyl having 1 to 24 carbon atoms or a branched-chain alkyl having 3 to 24 carbon atoms may be used. An alkyl having 1 to 18 carbon atoms (a branched-chain alkyl having 3 to 18 carbon atoms) is preferred, an alkyl having 1 to 12 carbon atoms (a branched-chain alkyl having 3 to 12 carbon atoms) is more preferred, an alkyl having 1 to 6 carbon atoms (a branched-chain alkyl having 3 to 6 carbon atoms) is even more preferred, and an alkyl having 1 to 4 carbon atoms (a branched-chain alkyl having 3 to 4 carbon atoms) is particularly preferred. Specific "alkyl" groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl, n-dodecyl, n-tridecyl, 1-hexylheptyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, Examples include n-heptadecyl, n-octadecyl, and n-eicosyl. R 21 ~R 28 Examples of the “cycloalkyl” of the “cycloalkyl that may be substituted” include cycloalkyl having 3 to 24 carbon atoms, cycloalkyl having 3 to 20 carbon atoms, cycloalkyl having 3 to 16 carbon atoms, cycloalkyl having 3 to 14 carbon atoms, cycloalkyl having 5 to 10 carbon atoms, cycloalkyl having 5 to 8 carbon atoms, cycloalkyl having 5 to 6 carbon atoms, cycloalkyl having 5 carbon atoms, etc. Specific examples of “cycloalkyl” include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, and their C1- to C4 alkyl (especially methyl) substituents, bicyclo[1.1.0]butyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.0]pentyl, bicyclo[2.1.1]hexyl, bicyclo[3.1.0]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, adamantyl, diamantyl, decahydronaphthalenyl, decahydroazulenyl, etc. R 21 ~R 28 As for the “aryl” of the “aryl that may be substituted” in the above, for example, an aryl having 6 to 30 carbon atoms can be cited, an aryl having 6 to 16 carbon atoms is preferred, an aryl having 6 to 12 carbon atoms is more preferred, and an aryl having 6 to 10 carbon atoms is particularly preferred. Specific examples of “aryls” include monocyclic phenyl, dicyclic biphenyl, condensed dicyclic naphthyl, tricyclic terphenylyl (m-terphenylyl, o-terphenylyl, p-terphenylyl), condensed tricyclic acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, condensed tetracyclic triphenylenyl, pyrenyl, naphthacenyl, and condensed pentacyclic perylenyl, pentacenyl. R 21 ~R 28 As for the “heteroaryl that may be substituted” in the above, for example, a heteroaryl having 2 to 30 carbon atoms may be cited, a heteroaryl having 2 to 25 carbon atoms is preferred, a heteroaryl having 2 to 20 carbon atoms is more preferred, a heteroaryl having 2 to 15 carbon atoms is even more preferred, and a heteroaryl having 2 to 10 carbon atoms is particularly preferred. In addition, as for the heteroaryl, for example, a heterocyclic ring containing 1 to 5 heteroatoms selected from oxygen, sulfur, and nitrogen in addition to carbon as ring constituent atoms may be cited. Specific "heteroaryls" include, for example, pyrrolyl, oxazolyl, isooxazolyl, thiazolyl, isothiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, triazolyl, tetrazolyl, pyrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, indolyl, isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naftiridinyl, furinyl, pteridinyl, carbazolyl, acridinyl, phenoxatiinyl, phenoxazinyl, phenothiazinyl, phenazinyl, indolizinyl, furil, Examples include benzofuranil, isobenzofuranil, dibenzofuranil, thienyl, benzo[b]thienyl, dibenzothienyl, furazanil, oxadiazollil, thiantrenil, naphthobenzofranil, naphthobenzothienyl, etc. R 21 ~R 28 As for the “alkoxy” of the “alkoxy that may be substituted” in the above, for example, a straight-chain alkoxy having 1 to 24 carbon atoms or a branched-chain alkoxy having 3 to 24 carbon atoms may be used. An alkoxy having 1 to 18 carbon atoms (a branched-chain alkoxy having 3 to 18 carbon atoms) is preferred, an alkoxy having 1 to 12 carbon atoms (a branched-chain alkoxy having 3 to 12 carbon atoms) is more preferred, an alkoxy having 1 to 6 carbon atoms (a branched-chain alkoxy having 3 to 6 carbon atoms) is even more preferred, and an alkoxy having 1 to 4 carbon atoms (a branched-chain alkoxy having 3 to 4 carbon atoms) is particularly preferred. Specific examples of “alkoxy” include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy, etc. R 21 ~R 28 In the case of the “aryloxy that may be substituted,” the “aryloxy” is a group in which the hydrogen of the -OH group is substituted with an aryl, and this aryl is the aforementioned R 21 ~R 28 You can cite the explanation of the "Aryl" in this regard. R21 ~R 28 As for the “arylthio that may be substituted” in [the example], the “arylthio” is a group in which the hydrogen of the -SH group is substituted with an aryl, and this aryl is the aforementioned R 21 ~R 28 You can cite the explanation of the "Aryl" in this regard. R 21 ~R 28 As for the "trialkylsilyl" in [the name], examples include a group in which three hydrogens in the silyl group are each independently substituted with an alkyl group, and this alkyl is the R described above. 21 ~R 28 The group described as "alkyl" in this context may be cited. The preferred alkyl for substitution is an alkyl having 1 to 4 carbon atoms, and specifically, examples include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl, etc. Specific examples of “trialkylsilyl” include trimethylsilyl, triethylsilyl, tripropylsilyl, trii-propylsilyl, tributylsilyl, trisec-butylsilyl, trit-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl, i-propyldimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, methyldipropylsilyl, ethyldipropylsilyl, butyldipropylsilyl, sec-butyldipropylsilyl, t-butyldipropylsilyl, methyldii-propylsilyl, ethyldii-propylsilyl, butyldii-propylsilyl, sec-butyldii-propylsilyl, t-butyldipropylsilyl, methyldii-propylsilyl, ethyldii-propylsilyl, butyldii-propylsilyl, sec-butyldii-propylsilyl, t-butyldii-propylsilyl, etc. R 21 ~R 28 As for the "tricycloalkylsilyl" in [the name], examples include a group in which three hydrogens in the silyl group are each independently substituted with a cycloalkyl, and this cycloalkyl is the R described above. 21 ~R 28The group described as "cycloalkyl" in this context may be cited. The cycloalkyl preferred for substitution is a cycloalkyl having 5 to 10 carbon atoms, and specifically, examples include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.0]pentyl, bicyclo[2.1.1]hexyl, bicyclo[3.1.0]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, adamantyl, decahydronaphthalenyl, decahydroazulenyl, etc. Specific examples of "tricycloalkylsilyl" include tricyclopentylsilyl and tricyclohexylsilyl. Specific examples of dialkylcycloalkylsilyls substituted with two alkyl and one cycloalkyl groups, and alkyldicycloalkylsilyls substituted with one alkyl and two cycloalkyl groups, include silyls substituted with groups selected from the specific alkyl and cycloalkyl groups described above. R 21 ~R 28 As for the "substituted amino" of the "amino that may be substituted" in [the document], for example, an amino group in which two hydrogens are substituted with aryl or heteroaryl groups can be cited. An amino in which two hydrogens are substituted with aryl groups is a diaryl-substituted amino, an amino in which two hydrogens are substituted with heteroaryl groups is a diheteroaryl-substituted amino, and an amino in which two hydrogens are substituted with aryl and heteroaryl groups is an aryl-heteroaryl-substituted amino. This aryl or heteroaryl is the R mentioned above. 21 ~R 28 You can cite the explanation of "aryl" or "heteroaryl" in this context. Specific examples of “substituted aminos” include diphenylamino, dinaphthylamino, phenylnaphthylamino, dipyridylamino, phenylpyridylamino, naphthylpyridylamino, etc. R 21 ~R 28 Examples of “halogens” in this context include fluorine, chlorine, bromine, and iodine. R 21 ~R28 Among the groups described as such, some may be substituted as described above, and in this case, alkyl, cycloalkyl, aryl, or heteroaryl substituents may be used. These alkyl, cycloalkyl, aryl, or heteroaryl groups are the aforementioned R 21 ~R 28 The group described as “alkyl,” “cycloalkyl,” “aryl,” or “heteroaryl” in this context may be cited. ">NR as Y" 29 R in 」 29 is an aryl that may be hydrogen or substituted, and as this aryl, the aforementioned R 21 ~R 28 The group described as an "aryl" in [the context] can be cited, and as that substituent, R 21 ~R 28 The group described as a substituent for can be cited. R 21 ~R 28 Adjacent groups may be combined to form a hydrocarbon ring, an aryl ring, or a heteroaryl ring. A group that does not form a ring is represented by the following formula (A-1), and a group that forms a ring is, for example, represented by the following formulas (A-2) to (A-14). Y and * in the formulas have the same definitions as above. In addition, at least one hydrogen in a group represented by any one of formulas (A-1) to (A-14) may be substituted with an alkyl, cycloalkyl, aryl, heteroaryl, alkoxy, aryloxy, aryltio, trialkylsilyl, tricycloalkylsilyl, dialkylcycloalkylsilyl, alkyldicycloalkylsilyl, diaryl-substituted amino, diheteroaryl-substituted amino, aryl-heteroaryl-substituted amino, halogen, hydroxy, or cyano. As for rings formed by the combination of adjacent groups, if they are hydrocarbon rings, an example is the cyclohexane ring, and as for aryl rings or heteroaryl rings, the aforementioned R 21 ~R 28Examples of ring structures described in “aryl” or “heteroaryl” in this case include these rings, which are formed by condensing with one or two benzene rings in formula (A-1). The group represented by Formula (A) is a group obtained by excluding one hydrogen atom at any position in Formula (A), and * indicates the corresponding position. That is, the group represented by Formula (A) may have any position as a bonding position. For example, one of the carbon atoms of the two benzene rings in the structure of Formula (A), R in the structure of Formula (A). 21 ~R 28 Any one of the cyclic atoms formed by the bonding of adjacent groups, or ">NR as Y in the structure of formula (A) 2 R in 9" 29 Any one of the positions, or ">NR 29 N(R in ” 29 This can be a group that directly combines with (this becomes a combining hand). The same applies to a group represented by any one of Equations (A-1) to (A-14). As for the device represented by formula (A), for example, a device represented by any one of formulas (A-1) to (A-14) is preferred, a device represented by any one of formulas (A-1) to (A-5) and formulas (A-12) to (A-14) is preferred, a device represented by any one of formulas (A-1) to (A-4) is more preferred, a device represented by any one of formulas (A-1), formula (A-3), and formula (A-4) is even more preferred, and a device represented by formula (A-1) is particularly preferred. The following are examples of the elements represented by Equation (A). Y and * in the equation have the same definitions as above. In the compound represented by formula (3-H), the group represented by formula (A) is formula (3-X 1 ) or formula(3-X2 The naphthalene ring in ), the single bond in formula (3-X3) and / or the Ar in formula (3-X3) 3 A combined form is desirable. In addition, the hydrogen in the chemical structure of an anthracene compound represented by the general formula (3-H) may be all or part deuterium. The anthracene compound as a host may be, for example, a compound represented by the following formula (3-H2). In formula (3-H2), Ar C is a substituted aryl or a substituted heteroaryl, and R C is hydrogen, alkyl, or cycloalkyl, and Ar 11 , Ar 12 , Ar 13 , Ar 14 , Ar 15 , Ar 16 , Ar 17 , and Ar 18 Each of the elements is independently hydrogen, an aryl that may be substituted, a heteroaryl that may be substituted, a diarylamino that may be substituted, a diheterolarylamino that may be substituted, an arylheterolarylamino that may be substituted, an alkyl that may be substituted, a cycloalkyl that may be substituted, an alkenyl that may be substituted, an alkoxy that may be substituted, an arylthio that may be substituted, or a silyl that may be substituted, and at least one hydrogen in the compound represented by formula (3-H-2) may be substituted with a halogen, a cyano, or a deuterium. In Formula (3-H2), the definitions of “substituted aryl,” “substituted heteroaryl,” “substituted diarylamino,” “substituted diheteroarylamino,” “substituted arylheteroarylamino,” “substituted alkyl,” “substituted cycloalkyl,” “substituted alkenyl,” “substituted alkoxy,” “substituted aryloxy,” “substituted arylthio,” or “substituted silyl” are the same as those in Formula (3-H) above, and the explanation in Formula (1) may be cited. As for the “aryl that may be substituted,” it is also desirable that it be represented by any one of the following formulas (3-H2-X1) to (3-H2-X7). In equations (3-H2-X1) through (3-H2-X7), * indicates a bonding position. In equations (3-H2-X1) to (3-H2-X3), Ar 21 , Ar 22 , and Ar 23 Each is independently hydrogen, phenyl, biphenyllyl, terphenyllyl, quaternphenyllyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyl, anthracenyl, or a group represented by formula (A). Meanwhile, in the explanation of formula (3-H2), the group represented by formula (A) is the same as that explained for the anthracene compound represented by formula (3-H). In equations (3-H2-X4) to (3-H2-X7), Ar 24 , Ar 25 , Ar 26 , Ar 27 and Ar 28 Each is independently hydrogen, phenyl, biphenyllyl, terphenyllyl, naphthyl, phenanthryl, fluorenyl, chrysenyl, triphenylenyl, pyrenyl, or a group represented by the formula (A) described below. In addition, any one or more hydrogens in each of the groups represented by formulas (3-H2-X1) to (3-H2-X7) may be substituted with alkyls having 1 to 6 carbon atoms (preferably methyl or t-butyl). Furthermore, a preferred example of “aryl that may be substituted” is terphenylyl (particularly, m-terphenyl-5'-yl) that may be substituted with one or more substituents selected from the group consisting of phenyl, biphenylyl, terphenylyl, naphthyl, phenanthyl, fluorenyl, chrysenyl, triphenylenyl, pyrenyl, and the group represented by formula (A). As for “heteroaryls that may be substituted,” the group represented by formula (A) can also be included. In addition, specific examples of “alyl that may be substituted” and “heteroaryl that may be substituted” include dibenzofuryl, naphthobenzofuryl, phenyl-substituted dibenzofuryl, etc. In the compound represented by formula (3-H), at least one hydrogen may be substituted with a halogen, cyano, or deuterium. Examples of "halogens" in this case include fluorine, chlorine, bromine, and iodine. In particular, a compound in which all hydrogens in the compound represented by formula (3-H) are substituted with deuterium is preferred. In equation (3-H2), R C is hydrogen, alkyl, or cycloalkyl, preferably hydrogen, methyl, or t-butyl, and more preferably hydrogen. In formula (3-H2), Ar 11 ~Ar 18 It is preferable that at least two of them be substituted aryls or substituted heteroaryls. That is, the anthracene compound represented by formula (3-H2) preferably has a structure in which at least three substituents selected from the group consisting of substituted aryls and substituted heteroaryls are bonded to the anthracene ring. Anthracene compounds represented by the formula (3-H2) are Ar 11 ~Ar 18 It is more preferable that two of the elements are substituted aryls or substituted heteroaryls, and the other six are hydrogen, substituted alkyls, substituted cycloalkyls, substituted alkenyls, or substituted alkoxys. That is, it is more preferable that the anthracene compound represented by formula (3-H2) has a structure in which three substituents selected from the group consisting of substituted aryls and substituted heteroaryls are bonded to the anthracene ring. Anthracene compounds represented by formula (3-H) are Ar 11 ~Ar 18 It is more preferable that any two of them are aryl or heteroaryl that may be substituted, and the other six are hydrogen, methyl, or t-butyl. Furthermore, in Equation (3-H2), R C is hydrogen, and also Ar 11 ~Ar 18 It is desirable that any six of them are hydrogen. The anthracene compound represented by formula (3-H2) is preferably an anthracene compound represented by the following formulas (3-H2-A), (3-H2-B), (3-H2-C), (3-H2-D), or (3-H2-E). Among formulas (3-H2-A), (3-H2-B), (3-H2-C), (3-H2-D) or (3-H2-E), Ar C' , Ar 11' , Ar 12' , Ar 13' , Ar 14' , Ar 15' , Ar 17' , and Ar 18'Each is independently phenyl, biphenyll, terphenyll, quarterphenyll, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyl, or a group represented by formula (A), and at least one hydrogen in the group may be substituted with phenyl, biphenyll, terphenyll, quarterphenyll, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyl, or a group represented by formula (A). Here, when the hydrogens of the methylene in fluorenyl and benzofluorenyl are all substituted with phenyl, these phenyls may be connected by single bonds. Ar C' , Ar 11' , Ar 12' , Ar 13' , Ar 14' , Ar 15' , Ar 17' , and Ar 18' In the carbon atoms of the unbonded anthracene ring, methyl or t-butyl may be bonded instead of hydrogen. Ar C' , Ar 11' , Ar 12' , Ar 13' , Ar 14' , Ar 15' , Ar 17' , and Ar 18' Where each is a substituted or unsubstituted phenyl or a substituted or unsubstituted naphthyl, the above formula (3-H2-X 1 It is preferable that the cause be represented by any one of the following formulas: )~(3-H2-X7). Ar C' , Ar 11' , Ar 12' , Ar 13' , Ar 14' , Ar 15' , Ar 17' , and Ar 18'It is more preferable that each be independently phenyl, biphenylyl (particularly biphenyl-2-yl or biphenyl-4-yl), terphenylyl (particularly m-terphenyl-5'-yl), naphthyl, phenanthyl, fluorenyl, or a group represented by any one of the above formulas (A-1) to (A-4), wherein at least one hydrogen in the group may be substituted with phenyl, biphenylyl, naphthyl, phenanthyl, fluorenyl, or a group represented by any one of the above formulas (A-1) to (A-4). In addition, at least one hydrogen in the compound represented by formulas (3-H2-A), (3-H2-B), (3-H2-C), (3-H2-D), or (3-H2-E) may be substituted with a halogen, cyano, or deuterium. An anthracene compound represented by the particularly desirable formula (3-H2) can be an anthracene compound represented by the following formula (3-H2-Aa). In formula (3-H2-Aa), Ar C' , Ar 14' , and Ar 15' Each is independently a phenyl, biphenyllyl, terphenyllyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyl, or a group represented by any one of the above formulas (A-1) to (A-11), and at least one hydrogen in the group may be substituted with a group represented by phenyl, biphenyllyl, terphenyllyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyl, or any one of the above formulas (A-1) to (A-11). Here, when the hydrogens of the methylene in fluorenyl and benzofluorenyl are all substituted with phenyl, these phenyls may be connected by single bonds. Also, Ar C' , Ar 14' , and Ar 15'In this unbonded anthracene ring, the carbon atom may be substituted with methyl or t-butyl instead of hydrogen. In the compound represented by formula (3-H2-Aa), at least one hydrogen may be substituted with a halogen or cyano, and in the compound represented by formula (3-H2-Aa), at least one hydrogen may be substituted with deuterium. In formula (3-H2-Aa), Ar C' , Ar 14' , and Ar 15' It is preferable that each is independently a group represented by phenyl, biphenyl, terphenyl, naphthyl, phenanthyl, fluorenyl, or any one of the formulas (A-1) to (A-4), and at least one hydrogen in the group may be substituted with a group represented by phenyl, naphthyl, phenanthyl, fluorenyl, or any one of the formulas (A-1) to (A-4). In the compound represented by the formula (3-H2-Aa), at least, the carbon at the 10th position of the anthracene ring (Ar C' It is preferable that the hydrogen bonded to the carbon (at the 9th position) is substituted with deuterium. That is, the compound represented by formula (3-H2-Aa) is preferably the compound represented by the following formula (3-H2-Ab). Meanwhile, in formula (3-H2-Ab), D is deuterium, and Ar C' , Ar 14' , and Ar 15' It is identical to the definition in Equation (3-H2-Aa). D in Equation (3-H2-Ab) indicates that at least this position is deuterium, and one or more of the other hydrogens in Equation (3-H2-Aa) may simultaneously be deuterium, and it is also preferable that all the hydrogens in Equation (3-H2-Aa) are deuterium. Specific examples of anthracene compounds include the following compounds. Meanwhile, in the following structural formulas, “Me” represents methyl, “D” represents deuterium, and “tBu” represents t-butyl. In addition, other specific examples of anthracene compounds include, for instance, compounds represented by the following formulas (3-131-Y) to (3-179-Y), compounds represented by the following formulas (3-180-Y) to (3-182-Y), the following formula (3-183-N), the following formulas (3-184-Y) to (3-254-Y), the following formulas (3-254-Y) to (3-269-Y), and compounds represented by the following formulas (3-500) to (3-557). Among the compounds represented by the following formulas (3-131-Y) to (3-179-Y), the compounds represented by the following formulas (3-180-Y) to (3-182-Y), the following formula (3-183-N), the following formulas (3-184-Y) to (3-254-Y), the following formulas (3-254-Y) to (3-269-Y), and the following formulas (3-500) to (3-557), hydrogen atoms may be partially or wholly substituted with deuterium. In the formulas, Y represents -O-, -S-, or >NR 29 (R 29 is the definition as above) or >C(-R 30 )2(R 30 It may be either an aryl or an alkyl that can be connected, and R 29 is, for example, phenyl, R 30 is, for example, methyl. For the formula number, for example, if Y is O, let formula (3-131-Y) be formula (3-131-O), and if Y is -S- or >NR 29In the case of , use Equation (3-131-S) or Equation (3-131-N), respectively. Among these compounds, formulas (3-131-Y) to (3-134-Y), formula (3-138-Y), formula (3-140-Y) to (3-143-Y), formula (3-150-Y), formula (3-153-Y) to (3-156-Y), formula (3-166-Y), formula (3-168-Y), formula (3-173-Y), formula (3-177-Y), formula (3-180-Y) to (3-183-N), formula (3-185-Y), formula (3-190-Y), formula (3-223-Y), formula (3-241-Y), formula (3-250-Y), formula (3-252-Y) to (3-254-Y), formula (3-501), formula (3-507), formula (3-508), Compounds represented by formulas (3-509), (3-513), (3-514), (3-519), (3-521), (3-538) to (3-547), or (3-600) to (3-620) are preferred. Additionally, it is preferable that Y is -O-. The anthracene compound represented by formula (3-H) comprises a compound having a reactive group at a desired position on the anthracene skeleton, and X, Ar 4 It can be manufactured by applying Suzuki coupling, Negishi coupling, or other known coupling reactions, using a compound having a reactive group in a substructure such as the structure of formula (A) as a starting material. Examples of reactive groups of these reactive compounds include halogens or boric acids. As for specific manufacturing methods, for example, the paragraph of International Publication No. 2014 / 141725

[0089] ~

[0175] You can refer to the synthesis method in this regard. [Fluorene compounds] Compounds represented by the general formula (4-H) basically function as hosts. Among the above formula (4-H), R 1 to R 10 Each is independently hydrogen, aryl, heteroaryl (the heteroaryl may be bonded to the fluorene backbone of formula (4-H) through a linker), diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, cycloalkyl, alkenyl, alkoxy, or aryloxy, and at least one hydrogen in these may be substituted with an aryl, heteroaryl, alkyl, or cycloalkyl group. Also, R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 5 and R 6 , R 6 and R 7 , R 7 and R 8 or R 9 and R 10Each of these may independently combine to form a condensed ring or a spiro ring, and at least one hydrogen in the formed ring may be substituted with an aryl, heteroaryl (said heteroaryl may be bonded to the formed ring through a linker), diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, cycloalkyl, alkenyl, alkoxy, or aryloxy, and at least one hydrogen in these may be substituted with an aryl, heteroaryl, alkyl, or cycloalkyl, and, In the compound represented by formula (4-H), at least one hydrogen may be substituted with a halogen, cyano, or deuterium. For details regarding each group in the definition of Formula (4-H), the explanation regarding the polycyclic aromatic compound of Formula (1) described above may be cited. R 1 to R 10 As for the alkenyls in the above, for example, alkenyls having 2 to 30 carbon atoms may be cited, alkenyls having 2 to 20 carbon atoms are preferred, alkenyls having 2 to 10 carbon atoms are more preferred, alkenyls having 2 to 6 carbon atoms are even more preferred, and alkenyls having 2 to 4 carbon atoms are particularly preferred. The preferred alkenyls are vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl. In addition, as a specific example of a heteroaryl, a monovalent group represented by removing any one hydrogen atom from a compound of the following formulas (4-Ar1), (4-Ar2), (4-Ar3), (4-Ar4), or (4-Ar5) may be cited. Among Equations (4-Ar1) to (4-Ar5), Y 1 Each is independently O, S, or NR, and R is phenyl, biphenyllyl, naphthyl, anthracenyl, or hydrogen, and At least one hydrogen in the structure of the above formulas (4-Ar1) to (4-Ar5) may be substituted with phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, methyl, ethyl, propyl, or butyl. These heteroaryls may be bonded to the fluorene backbone in formula (4-H) through a linker. That is, the heteroaryls may not only be directly bonded to the fluorene backbone in formula (4-H), but may also be bonded to each other through a linker. Examples of such linkers include phenylene, biphenylene, naphthylene, anthracenylene, methylene, ethylene, -OCH2CH2-, -CH2CH2O-, or -OCH2CH2O-. Also, R in equation (4-H) 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 5 and R 6 , R 6 and R 7 or R 7 and R 8 These each combine independently to form a condensation ring, R 9 and R 10 It is acceptable for this to combine to form a spiro ring. R 1 to R 8 The condensed ring formed by is a ring that condenses to the benzene ring in formula (4-H), and is an aliphatic ring or an aromatic ring. Preferably, it is an aromatic ring, and examples of structures including the benzene ring in formula (4-H) include a naphthalene ring or a phenanthrene ring. R 9 and R 10 The spiro ring formed by the formula (4-H) is a ring that is spiro-bonded to the five-membered ring in the formula (4-H), and is an aliphatic ring or an aromatic ring. Preferably, it is an aromatic ring, and examples include a fluorene ring. The compound represented by formula (4-H) is preferably a compound represented by the following formula (4-H-1), formula (4-H-2), or formula (4-H-3), each wherein R in formula (4-H) 1 and R 2 A compound formed by the condensation of benzene rings formed by the combination of, wherein R in formula (4-H) 3 and R 4 A compound formed by the condensation of benzene rings formed by the combination of, wherein R in formula (4-H) 1 to R 8 It is a compound in which not all of them are bonded together. R in Equations (4-H-1), (4-H-2), and (4-H-3) 1 to R 10 The definition of is the corresponding R in Equation (4-H). 1 to R 10 Same as, and R in Equation (4-H-1) and Equation (4-H-2) 11 to R 14 The definition of R in Equation (4-H) 1 to R 10 It is identical to. The compound represented by formula (4-H) is, more preferably, a compound represented by the following formula (4-H-1A), formula (4-H-2A), or formula (4-H-3A), respectively, R in formula (4-H-1), formula (4-H-1), or formula (4-H-3). 9 and R 10 It is a compound in which a spiro-fluorene ring is formed by this bonding. R in Equations (4-1A), (4-2A), and (4-3A) 2 to R 7 The definition of is the corresponding R in Equations (4-1), (4-2), and (4-3). 2 to R 7 Same as, and R in Equation (4-1A) and Equation (4-2A) 11 to R 14The definition of R in Equations (4-1) and (4-2) 11 to R 14 It is the same as. In addition, hydrogen in the compound represented by formula (4-H) may be all or partly substituted with halogen, cyano, or deuterium. More specific examples of fluorene-based compounds as hosts include compounds represented by the following structural formulas. Meanwhile, “Me” represents methyl. [Dibenzochrysene compounds] The dibenzocrysene-based compound serving as a host is, for example, a compound represented by the following formula (5-H). Among the equation (5-H), R 1 to R 16 Each is independently a hydrogen, aryl, heteroaryl (the heteroaryl may be bonded to the dibenzochrisene backbone of formula (5-H) through a linker), diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, cycloalkyl, alkenyl, alkoxy, or aryloxy, and at least one hydrogen in these may be substituted with an aryl, heteroaryl, alkyl, or cycloalkyl group. Also, R 1 to R 16 Adjacent groups may be bonded to form a condensed ring, and at least one hydrogen in the formed ring may be substituted with an aryl, heteroaryl (said heteroaryl may be bonded to the formed ring through a linker), diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, cycloalkylalkenyl, alkoxy, or aryloxy, and at least one hydrogen in these may be substituted with an aryl, heteroaryl, alkyl, or cycloalkyl, and, In the compound represented by formula (5-H), at least one hydrogen may be substituted with a halogen, cyano, or deuterium. For details regarding each group in the definition of Formula (5-H), the explanation regarding the polycyclic aromatic compound of Formula (1) described above may be cited. As for the alkenyl in the definition of the above formula (5-H), for example, an alkenyl having 2 to 30 carbon atoms may be used, an alkenyl having 2 to 20 carbon atoms is preferred, an alkenyl having 2 to 10 carbon atoms is more preferred, an alkenyl having 2 to 6 carbon atoms is even more preferred, and an alkenyl having 2 to 4 carbon atoms is particularly preferred. The preferred alkenyls are vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl. In addition, as a specific example of a heteroaryl, a monovalent group represented by removing any one hydrogen atom from a compound of the following formulas (5-Ar1), (5-Ar2), (5-Ar3), (5-Ar4), or (5-Ar5) may be cited. Among formulas (5-Ar1) to (5-Ar5), Y 1 Each is independently O, S, or NR, and R is phenyl, biphenyllyl, naphthyl, anthracenyl, or hydrogen, and At least one hydrogen in the structure of the above formulas (5-Ar1) to (5-Ar5) may be substituted with phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, methyl, ethyl, propyl, or butyl. These heteroaryls may be bonded to the dibenzochrysene backbone of formula (5-H) through a linker. That is, the heteroaryls may not only be directly bonded to the dibenzochrysene backbone of formula (5-H), but may also be bonded to each other through a linker. Examples of such linkers include phenylene, biphenylene, naphthylene, anthracenylene, methylene, ethylene, -OCH2CH2-, -CH2CH2O-, or -OCH2CH2O-. The compound represented by formula (5-H) is preferably R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 is hydrogen. In this case, R in equation (5-H) 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 It is preferable that each is independently hydrogen, phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, a monovalent group having the structure of formula (5-Ar1), formula (5-Ar2), formula (5-Ar3), formula (5-Ar4), or formula (5-Ar5) (the monovalent group having said structure may be bonded to the dibenzochrisene backbone in the above formula (5-H) through phenylene, biphenylene, naphthylene, anthracenylene, methylene, ethylene, -OCH2CH2-, -CH2CH2O-, or -OCH2CH2O-), methyl, ethyl, propyl, or butyl. The compound represented by formula (5-H) is, more preferably, R 1 , R 2 , R 4 , R 5 , R 7 , R 8 , R 9 , R 10 , R12 , R 13 , R 15 and R 16 is hydrogen. In this case, R in equation (5-H) 3 , R 6 , R 11 and R 14 At least one of (preferably one or two, more preferably one) is a monovalent group having the structure of formula (5-Ar1), formula (5-Ar2), formula (5-Ar3), formula (5-Ar4) or formula (5-Ar5) through a single bond, phenylene, biphenylene, naphthylene, anthracenylene, methylene, ethylene, -OCH2CH2-, -CH2CH2O-, or -OCH2CH2O-, and Except for at least one of the above (i.e., a position other than where a monovalent group having the above structure is substituted), the hydrogen, phenyl, biphenyl, naphthyl, anthracenyl, methyl, ethyl, propyl, or butyl, and at least one hydrogen in these may be substituted with phenyl, biphenyl, naphthyl, anthracenyl, methyl, ethyl, propyl, or butyl. Also, R in equation (5-H) 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 As such, if a monovalent group having a structure represented by the above formulas (5-Ar1) to (5-Ar5) is selected, at least one hydrogen in the said structure is R in formula (5-H). 1 to R 16 It may form a single bond by combining with any one of them. More specific examples of dibenzochrisene compounds as hosts include compounds represented by the following structural formulas. Meanwhile, "tBu" represents t-butyl. [Pyrene compounds] Examples of pyrene-based compounds include the pyrene compounds described in International Publication No. 2021 / 210304, International Publication No. 2021 / 210305, or International Publication No. 2021 / 049659. Specific examples of pyrene-based compounds include the following compounds. <Dopant Material> In addition to the polycyclic aromatic compounds of the present invention, known compounds may be used as dopant materials, and various materials may be selected according to the desired emission color.Specifically, for example, condensed ring derivatives such as phenanthrene, anthracene, pyrene, tetracene, pentacene, perylene, naphthopyrene, dibenzopyrene, rubrene, and chrysene; benzoxazole derivatives, benzothiazole derivatives, benzimidazole derivatives, benzotriazole derivatives, oxazole derivatives, oxadiazole derivatives, thiazole derivatives, imidazole derivatives, thiadiazole derivatives, triazole derivatives, pyrazolin derivatives, stilbene derivatives, thiophene derivatives, tetraphenylbutadiene derivatives, cyclopentadiene derivatives, bisstyryl derivatives such as bisstyrylanthracene derivatives or distyrylbenzene derivatives (Japanese Patent Publication No. Hei 1-245087), bisstyrylarylene derivatives (Japanese Patent Publication No. Hei 2-247278), diazaindacene derivatives, furan derivatives, benzofuran derivatives, phenylisobenzofuran, Isobenzofuran derivatives such as dimethylisobenzofuran, di(2-methylphenyl)isobenzofuran, di(2-trifluoromethylphenyl)isobenzofuran, and phenylisobenzofuran; dibenzofuran derivatives; coumarin derivatives such as 7-dialkylaminocoumarin derivatives, 7-piperidinocoumarin derivatives, 7-hydroxycoumarin derivatives, 7-methoxycoumarin derivatives, 7-acetoxycoumarin derivatives, 3-benzothiazolylcoumarin derivatives, 3-benzimidazolylcoumarin derivatives, and 3-benzoxazolylcoumarin derivatives; dicyanomethylenepyran derivatives, dicyanomethylenethiopyran derivatives; polymethine derivatives; cyanine derivatives; oxobenzoanthracene derivatives; xanthen derivatives; rhodamine derivatives; fluorescein derivatives; pyrillium derivatives; carbostyryl derivatives; acridine derivatives, Examples include oxazine derivatives, phenylene oxide derivatives, quinacridone derivatives, quinazoline derivatives, pyrrolopyridine derivatives, furopyridine derivatives, 1,2,5-thiadiazolopyrene derivatives, pyromethene derivatives, perinone derivatives, pyrrolopyrrole derivatives, squaryllium derivatives, biolanthron derivatives, phenazine derivatives, acridone derivatives, deazaflavin derivatives, fluorene derivatives, and benzofluorene derivatives. As a dopant material, it is also preferable to use a polycyclic aromatic compound containing boron as described in International Publication No. 2015 / 102118, International Publication No. 2020 / 162600, and paragraphs 0097 to 0269 of Japanese Patent Publication No. 2021-077890. Specific examples of dopants that can be combined with the compounds of the present invention are shown below. Assisting Dopant (Thermal-activated Retarder Phosphor or Phosphorescent Material) It is also preferable that the light-emitting layer includes an assisting dopant along with an imitating dopant and a host material. As the assisting dopant, a thermally activated delay phosphor or a phosphorescent material is preferred. The polycyclic aromatic compound of the present invention can preferably be used as an imitating dopant in a TAF device or a PSF device. In the present embodiment, known compounds may be used as the host compound, for example, compounds having at least one of a carbazole ring and a furan ring, and among these, it is preferable to use a compound in which at least one of furanyl and carbazolyl is combined with at least one of arylene and heteroarylene. Specific examples include mCP (1,3-bis(N-carbazole-9-yl)benzene) or mCBP (3,3'-di(9H-carbazole-9-yl)-1,1'-biphenyl). Additionally, a compound having TADF activity may be used as the host compound. In the present embodiment, it is also preferable to use a combination of a hole-transporting host material and an electron-transporting host material (e.g., compounds HH-1-115 and EH-1-99) as a host. The lowest excitation triplet energy level E(1, T, Sh) obtained from the shoulder of the peak short wavelength side of the phosphorescence spectrum of the host compound is preferably higher than the lowest excitation triplet energy levels E(2, T, Sh) and E(3, T, Sh) of the imitating dopant or assisting dopant having the highest lowest excitation triplet energy level in the emissive layer, in order to promote rather than inhibit the generation of TADF in the emissive layer. Specifically, the lowest excitation triplet energy level E(1, T, Sh) of the host compound is preferably 0.01 eV or higher than E(2, T, Sh) and E(3, T, Sh), more preferably 0.03 eV or higher, and even more preferably 0.1 eV or higher. Additionally, the lowest excitation triplet energy level E of the host material is preferably 2.70 eV or higher, more preferably 2.73 eV or higher, and even more preferably 2.80 eV or higher. [Thermal-activated delayed fluorophores] "Thermal-activated delayed fluorescence" refers to a compound capable of absorbing thermal energy to induce a reverse transition from the least excited triplet state to the least excited singlet state, and emitting delayed fluorescence by deactivating radiation from that least excited singlet state. However, "thermal-activated delayed fluorescence" includes cases where a higher-order triplet is passed through during the excitation process from the least excited triplet state to the least excited singlet state. For example, a paper by Monkman et al. at the University of Durham (NATURE COMMUNICATIONS, 7:13680, DOI:10.1038 / ncomms13680), a paper by Hosokai et al. at the National Institute of Advanced Industrial Science and Technology (AIST, Sci.Adv.2017;3: e1603282), a paper by Sato et al. at Kyoto University (Scientific Reports, 7:4820, DOI:10.1038 / s41598-017-05007-7), a conference presentation by Sato et al. at Kyoto University (98th Spring Annual Meeting of the Japanese Chemical Society, Presentation No.: 2I4-15, Mechanism of High-Efficiency Luminescence in Organic Electroluminescence Using DABNA as a Luminescent Molecule, Graduate School of Engineering, Kyoto University), a review by Bui et al. (DOI:10.3762 / bjoc.14.18), and by Duan et al. Examples include the review by Ding et al. (DOI:10.1063 / 1.5143501), the review by Ding et al. (DOI:10.1088 / 1674-4926 / 42 / 5 / 050201), and the review by Xie et al. (DOI:10.1002 / adom.202002204). In the present invention, for a sample containing a target compound, if a slow fluorescence component is observed when the fluorescence lifetime is measured at 300K, the target compound is determined to be a "thermally active delayed fluorescence." Here, a slow fluorescence component refers to one with a fluorescence lifetime of 0.1 μsec or more. The measurement of the fluorescence lifetime can be performed, for example, using a fluorescence lifetime measuring device (Hamamatsu Photonics Co., Ltd., C11367-01). In a light-emitting layer further comprising a "thermally activated delay phosphor" as an assisting dopant, the polycyclic aromatic compound of the present invention can be made to function as an imitation dopant. That is, the "thermally activated delay phosphor" can function as an assisting dopant that assists the light emission of the polycyclic aromatic compound of the present invention. In this specification, an organic electroluminescent device that uses a thermally activated delay phosphor as an assisting dopant may be referred to as a "TAF device" (TADF Assisting Fluorescence device). In a TAF device, the term "host compound" refers to a compound whose lowest excitation singlet energy level, obtained from the shoulder of the peak short wavelength side of the fluorescence spectrum, is higher than that of the thermally activated delay phosphor acting as an assisting dopant and the imitating dopant. The thermally activated delayed phosphor (TADF compound) used in the TAF device is preferably a donor-acceptor type thermally activated delayed phosphor (DA type TADF compound) designed to enable efficient reverse intersystem crossing by localizing the HOMO (Highest Occupied Molecular Orbital) and LUMO (Lowest Unoccupied Molecular Orbital) within the molecule using an electron-donating substituent called a donor and an electron-accepting substituent called an acceptor. Here, in this specification, "electron-donating substituent" (donor) refers to a substituent and substructure in which a HOMO is localized within a thermally activated delayed fluorescent molecule, and "electron-accepting substituent" (acceptor) refers to a substituent and substructure in which a LUMO is localized within a thermally activated delayed fluorescent molecule. Generally, thermally activated delayed phosphors using donors or acceptors have large spin-orbit coupling (SOC) due to their structure, and also have small exchange interactions between HOMO and LUMO and ΔE S1T1 Because of this small size, a very fast crossover speed between reverse terms is obtained. By using the polycyclic aromatic compound of the present invention as an imitating dopant and a thermally activated delay phosphor (TADF material) as an assisting dopant, a device satisfying one or all of high efficiency, high color purity, and long lifespan can be provided. The thermally activated delay phosphor may be a compound whose emission spectrum overlaps at least partially with the absorption spectrum of the polycyclic aromatic compound of the present invention. The polycyclic aromatic compound and the TADF compound of the present invention may both be contained in the same layer, or they may be contained in adjacent layers or other adjacent layers. As a thermally activated delay phosphor in a TAF device, for example, a compound in which a donor and an acceptor are bonded directly or through a spacer may be used. As for the electron donor group (donor-type structure) and electron acceptor group (acceptor-type structure) used in the thermally activated delay phosphor of the present invention, for example, a structure described in Chemistry of Materials, 2017, 29, 1946-1963 may be used. Examples of donor structures include carbazole, dimethylcarbazole, di-tert-butylcarbazole, dimethoxycarbazole, tetramethylcarbazole, benzofluorocarbazole, benzothienocarbazole, phenyldihydroindolocarbazole, phenylbicarbazole, bicarbazole, tercarbazole, diphenylcarbazolylamine, tetraphenylcarbazolyldiamine, phenoxazine, dihydrophenazine, phenothiazine, dimethyldihydroacridine, diphenylamine, bis(tert-butylphenyl)amine, N1-(4-(diphenylamino)phenyl)-N4,N4-diphenylbenzene-1,4-diamine, dimethyltetraphenyldihydroacridinediamine, tetramethyl-dihydro-indenoacridine, and diphenyl-dihydrodibenzoazacillin. As acceptor structures, sulfonyldibenzene, benzophenone, phenylenebis(phenylmethanone), benzonitrile, isonicotinonitrile, phthalonitrile, isophthalonitrile, paraphthalonitrile, benzenetricarbonitrile, triazole, oxazole, thiadiazole, benzothiazole, benzobis(thiazole), benzoxazole, benzobis(oxazole), quinoline, benzimidazole, dibenzoquinoxaline, hepta-azafenalene, thioxantone dioxide, dimethylanthracenone, anthracendione, 5H-cyclopenta[1,2-b:5,4-b']dipyridine, fluorendicarbonitrile, triphenyltriazine, pyrazinedicarbonitrile, pyrimidine, phenylpyrimidine, methylpyrimidine, Examples include pyridine dicarbonitrile, dibenzoquinoxaline dicarbonitrile, bis(phenylsulfonyl)benzene, dimethylthioxanthen dioxide, thianthren tetraoxide, and tris(dimethylphenyl)borane.In particular, the compound having a thermally activated delayed fluorescence in a TAF device is preferably a compound having at least one selected from carbazole, phenoxazine, acridine, triazine, pyrimidine, pyrazine, thioxanthen, benzonitrile, phthalonitrile, isophthalonitrile, diphenylsulfone, triazole, oxadiazole, thiadiazole, and benzophenone as a partial structure. The compound used as an assisting dopant in the light-emitting layer of a TAF device is preferably a thermally activated delayed phosphor, and its emission spectrum overlaps at least partially with the absorption peak of the imitation dopant. [Phosphorescent Material] In the emissive layer, a phosphorescent material may be used as an assisting dopant. In this specification, an organic electroluminescent device using a phosphorescent material as an assisting dopant may be referred to as a phosphorescent assist device, a phosphorescent-sensitized fluorescent device, or a PSF device. The phosphorescent material obtains luminescence from an excited triplet state by utilizing intramolecular spin-orbit interactions (heavy atom effect) by metal atoms. As such a phosphorescent material, for example, a luminescent metal complex may be used. Examples of luminescent metal complexes include compounds represented by the following formulas (B-1) and (B-2). In formula (B-1), M is at least one selected from the group consisting of Ir, Pt, Au, Eu, Ru, Re, Ag and Cu, n is an integer from 1 to 3, and “XY” are each independently two ligands. In formula (B-2), M is at least one selected from the group consisting of Pt, Re and Cu, and “WXYZ” is a tetralocertive ligand. In equation (B-1), from the perspective of efficiency and lifespan, M is preferably Ir and n is preferably 3. In equation (B-2), M is preferred as Pt from the perspective of efficiency and lifespan. The ligand (XY) in formula (B-1) has at least one ligand selected from the group consisting of the following. The ligand (WXYZ) in formula (B-2) has at least one ligand selected from the group consisting of the following as part. During the meal, In ---, it combines with the central metal M, and Y is, each independently, BR e , NR e , PR e , O, S, Se, C=O, S=O, SO2, CR e R f , SiR e R f , or GeR e R f is The aromatic carbon CH in the ring may each be independently substituted with N, and R e and R f It may arbitrarily condense or combine to form a ring, and R a , R b , R c , and R d Each can be independently unsubstituted or substituted from 1 to the maximum possible number, and R a , R b , R c , R d , R e , and R f a, each independently hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, or a combination thereof, However, R a , R b , Rc , and R d Any two adjacent substituents in the above may condense or combine to form a ring or form a polydentate ligand. Compounds represented by formula (B-1) include, for example, Ir(ppy)3, Ir(ppy)2(acac), Ir(mppy)3, Ir(PPy)2(m-bppy), BtpIr(acac), Ir(btp)2(acac), Ir(2-phq)3, Hex-Ir(phq)3, Ir(fbi)2(acac), fac-Tris(2-(3-p-xylyl)phenyl)pyridine iridium(III), Eu(dbm)3(Phen), Ir(piq)3, Ir(piq)2(acac), Ir(Fliq)2(acac), Ir(Flq)2(acac), Ru(dtb-bpy)3·2(PF6), Ir(2-phq)3, Ir(BT)2(acac), Ir(DMP)3, Examples include Ir(Mphq)3IR(phq)2tpy, fac-Ir(ppy)2Pc, Ir(dp)PQ2, Ir(Dpm)(Piq)2, Hex-Ir(piq)2(acac), Hex-Ir(piq)3, Ir(dmpq)3, Ir(dmpq)2(acac), FPQIrpic, etc. Other compounds represented by formula (B-1) include, for example, the following compounds. In addition, an iridium complex described in Japanese Patent Publication No. 2006-089398, Japanese Patent Publication No. 2006-080419, Japanese Patent Publication No. 2005-298483, Japanese Patent Publication No. 2005-097263, and Japanese Patent Publication No. 2004-111379, and U.S. Patent Application Publication No. 2019 / 0051845, etc., or a platinum complex described in Advanced Materials, 26:7116-7121, NPG Asia Materials 13, 53(2021), Applied Physics Letters, 117, 253301 (2020), Light-Emitting Diode - An Outlook On the Empirical Features and Its Recent Technological Advancements, Chapter 5 may be used. 2-1-3. Substrate in an Organic Electroluminescent Device The substrate (101) is a support for the organic electroluminescent device (100), and typically, quartz, glass, metal, plastic, etc. are used. Depending on the purpose, the substrate (101) is formed in a plate shape, a film shape, or a sheet shape, and for example, a glass plate, a metal plate, a metal foil, a plastic film, a plastic sheet, etc. are used. Among these, a glass plate and a plate made of a transparent synthetic resin such as polyester, polymethacrylate, polycarbonate, or polysulfone are preferred. In the case of a glass substrate, soda-lime glass or alkali-free glass, etc. are used, and the thickness should be sufficient to maintain mechanical strength, so for example, 0.2 mm or more is sufficient. As for the upper limit of the thickness, for example, 2 mm or less, preferably 1 mm or less. Regarding the material of the glass, alkali-free glass is preferred because it is desirable to have fewer ions leached from the glass, but soda-lime glass with a barrier coating such as SiO2 is also commercially available and can be used. In addition, to increase gas barrier properties, a gas barrier film, such as a dense silicon oxide film, may be formed on at least one side of the substrate (101), and in particular, when a plate, film, or sheet made of a synthetic resin with low gas barrier properties is used as the substrate (101), it is preferable to form a gas barrier film. 2-1-4. Anode in an Organic Electroluminescent Device The anode (102) serves to inject holes into the light-emitting layer (105). Meanwhile, if a hole injection layer (103) and / or a hole transport layer (104) are installed between the anode (102) and the light-emitting layer (105), holes are injected into the light-emitting layer (105) through them. Materials for forming the anode (102) may include inorganic compounds and organic compounds. Examples of inorganic compounds include metals (aluminum, gold, silver, nickel, palladium, chromium, etc.), metal oxides (indium oxide, tin oxide, indium-tin oxide (ITO), indium-zinc oxide (IZO), etc.), metal halides (copper iodide, etc.), copper sulfide, carbon black, ITO glass, or nesa glass. Examples of organic compounds include polythiophenes such as poly(3-methylthiophene), conductive polymers such as polypyrrole and polyaniline. In addition, materials used as anodes for organic electroluminescent devices may be appropriately selected and used. The resistance of the transparent electrode is not limited as long as it can supply sufficient current for the light emission of the light-emitting device, but from the perspective of the power consumption of the light-emitting device, it is desirable to have low resistance. For example, an ITO substrate with a resistance of 300 Ω / □ or less functions as a device electrode, but since substrates with a resistance of about 10 Ω / □ are now available, it is particularly desirable to use a low-resistance product with a resistance of, for example, 100 to 5 Ω / □, preferably 50 to 5 Ω / □. The thickness of the ITO can be arbitrarily selected to match the resistance value, but it is typically used between 50 and 300 nm. 2-1-5. Hole injection layer and hole transport layer in organic electroluminescent devices The hole injection layer (103) serves to efficiently inject holes moving from the anode (102) into the light-emitting layer (105) or the hole transport layer (104). The hole transport layer (104) serves to efficiently transport holes injected from the anode (102) or holes injected from the anode (102) through the hole injection layer (103) to the light-emitting layer (105). The hole injection layer (103) and the hole transport layer (104) are each formed by stacking and mixing one or more types of hole injection / transport materials, or by a mixture of a hole injection / transport material and a polymer binder. Additionally, the layers may be formed by adding an inorganic salt, such as iron(III) chloride, to the hole injection / transport material. As a hole injection and transport material, it is necessary to efficiently inject and transport holes from the positive electrode between electrodes to which an electric field is applied; therefore, it is desirable to have high hole injection efficiency and to efficiently transport the injected holes. To achieve this, it is desirable to have a low ionization potential, high hole mobility, excellent stability, and a material that is unlikely to generate trapped impurities during manufacturing and use. As a material for forming the hole injection layer (103) and the hole transport layer (104), any compound can be selected and used from among compounds conventionally used as charge transport materials for holes in photoconductive materials, p-type semiconductors, and known compounds used in the hole injection layer and hole transport layer of organic electroluminescent devices. Specific examples of these include carbazole derivatives (N-phenylcarbazole, polyvinylcarbazole, etc.), biscarbazole derivatives such as bis(N-arylcarbazole) or bis(N-alkylcarbazole), triarylamine derivatives (polymers having aromatic tertiary aminos in the main chain or side chain, 1,1-bis(4-di-p-tolylaminophenyl)cyclohexane, N,N'-diphenyl-N,N'-di(3-methylphenyl)-4,4'-diaminobiphenyl, N,N'-diphenyl-N,N'-dinaphthyl-4,4'-diaminobiphenyl, N,N'-diphenyl-N,N'-di(3-methylphenyl)-4,4'-diphenyl-1,1'-diamine, N,N'-dinaphthyl-N,N'-diphenyl-4,4'-diphenyl-1,1'-diamine, N4, N4'-diphenyl-N4, Triphenylamine derivatives such as N4'-bis(9-phenyl-9H-carbazole-3-yl)-[1,1'-biphenyl]-4,4'-diamine, N4,N4,N4',N4'-tetra[1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-4,4'-diamine, 4,4',4"-tris(3-methylphenyl(phenyl)amino)triphenylamine, starburstamine derivatives, etc.), stilbene derivatives, phthalocyanine derivatives (metal-free, copperphthalocyanine, etc.), pyrazolin derivatives, hydrazone compounds, benzofuran derivatives or thiophene derivatives, oxadiazole derivatives, quinoxaline derivatives (e.g., 1,4,5,8,9,12-hexaazatriphenylene-2,3,6,7,10,11-hexacarbonitrile, etc.), heterocyclic compounds such as porphyrin derivatives, polysilanes These are examples. In the polymer system, polycarbonates or styrene derivatives, polyvinylcarbazole, and polysilanes having the above monomer in a side chain are preferred, but any compound that can form a thin film necessary for fabricating a light-emitting device, inject holes from the anode, and transport holes is not particularly limited. In addition, it is known that the conductivity of organic semiconductors is strongly influenced by their doping. Such organic semiconductor matrix materials are composed of compounds with good electron-donating properties or compounds with good electron-accepting properties. For doping electron-donating materials, strong electron acceptors such as tetracyanoquinone dimethane (TCNQ) or 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane (F4TCNQ) are known (see, for example, “M. Pfeiffer, A. Beyer, T. Fritz, K. Leo, Appl. Phys. Lett., 73(22), 3202-3204 (1998)” and “J. Blochwitz, M. Pfeiffer, T. Fritz, K. Leo, Appl. Phys. Lett., 73(6), 729-731 (1998)”). These generate so-called holes through the electron transfer process in electron-donating base materials (hole transport materials). Depending on the number and mobility of holes, the conductivity of the base material changes significantly. As matrix materials having hole transport characteristics, examples include benzidine derivatives (TPD, etc.) or starburst amine derivatives (TDATA, etc.), or certain metal phthalocyanines (particularly zinc phthalocyanine (ZnPc), etc.) are known (Japanese Patent Publication No. 2005-167175). The polycyclic aromatic compound of the present invention may be used as a material for forming a hole injection layer or a material for forming a hole transport layer. 2-1-6. Electron blocking layer in an organic electroluminescent device An electron blocking layer that prevents the diffusion of electrons from the emissive layer may be formed between the hole injection / transport layer and the emissive layer. For forming the electron blocking layer, a compound represented by any one of the above formulas (H1), (H2), and (H3) may be used. The polycyclic aromatic compound of the present invention may be used as a material for forming an electronic blocking layer. 2-1-7. Electron injection layer and electron transport layer in an organic electroluminescent device The electron injection layer (107) serves to efficiently inject electrons moving from the cathode (108) into the light-emitting layer (105) or the electron transport layer (106). The electron transport layer (106) serves to efficiently transport electrons injected from the cathode (108) or electrons injected from the cathode (108) through the electron injection layer (107) to the light-emitting layer (105). The electron transport layer (106) and the electron injection layer (107) are each formed by stacking and mixing one or more types of electron transport and injection materials. The electron injection and transport layer is a layer responsible for injecting electrons from the cathode and transporting electrons, and it is desirable to have high electron injection efficiency and efficiently transport the injected electrons. To achieve this, it is desirable to use a material that has high electron affinity and high electron mobility, excellent stability, and is unlikely to generate trapped impurities during manufacturing and use. However, when considering the balance of hole and electron transport, if the primary role is to efficiently prevent holes from the anode from flowing toward the cathode without recombination, the effect of improving luminous efficiency is equivalent to that of a material with high electron transport capability, even if the electron transport capability is not particularly high. Therefore, the electron injection and transport layer in this embodiment may also include the function of a layer capable of efficiently preventing the movement of holes. As a material (electron transport material) forming the electron transport layer (106) or electron injection layer (107), any of the compounds conventionally used as electron transfer compounds in photoconductive materials, and known compounds used in the electron injection layer and electron transport layer of organic EL devices may be selected and used. As a material used in an electron transport layer or an electron injection layer, it is preferable to contain at least one selected from compounds consisting of aromatic rings or heteroaromatic rings composed of one or more atoms selected from carbon, hydrogen, oxygen, sulfur, silicon, and phosphorus, pyrrole derivatives and their condensed ring derivatives, and metal complexes having electron-accepting nitrogen. Specifically, examples include condensed ring aromatic ring derivatives such as naphthalene and anthracene, styryl aromatic ring derivatives represented by 4,4'-bis(diphenylethenyl)biphenyl, perinone derivatives, coumarin derivatives, naphthalimide derivatives, quinone derivatives such as anthraquinone or diphenoquinone, phosphoroxide derivatives, carbazole derivatives, and indole derivatives. Examples of metal complexes having electron-accepting nitrogen include hydroxyazole complexes such as hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. These materials may be used alone, but they may also be used in combination with other materials. In addition, as specific examples of other electron transfer compounds, pyridine derivatives, naphthalene derivatives, fluoranthene derivatives, BO-based derivatives, phenanthroline derivatives, perinone derivatives, coumarin derivatives, naphthalimide derivatives, anthraquinone derivatives, diphenoquinone derivatives, diphenylquinone derivatives, perylene derivatives, oxadiazole derivatives (1,3-bis[(4-t-butylphenyl)1,3,4-oxadiazolyl]phenylene, etc.), thiophene derivatives, triazole derivatives (N-naphthyl-2,5-diphenyl-1,3,4-triazole, etc.), thiadiazole derivatives, metal complexes of auxin derivatives, quinolinol metal complexes, quinoxaline derivatives, polymers of quinoxaline derivatives, benzazole compounds, gallium complexes, pyrazol derivatives, perfluorophenylene derivatives, triazine derivatives, pyrazine derivatives, and benzoquinoline Examples include derivatives (2,2'-bis(benzo[h]quinoline-2-yl)-9,9'-spirobifluorene, etc.), imidazopyridine derivatives, borane derivatives, benzimidazole derivatives (tris(N-phenylbenzimidazole-2-yl)benzene, etc.), benzoxazole derivatives, thiazole derivatives, benzothiazole derivatives, quinoline derivatives, oligopyridine derivatives such as terpyridine, bipyridine derivatives, terpyridine derivatives (1,3-bis(4'-(2,2':6'2"-terpyridinyl))benzene, etc.), naphthiridine derivatives (bis(1-naphthyl)-4-(1,8-naphthiridine-2-yl)phenylphosphine oxide, etc.), aldazine derivatives, pyrimidine derivatives, arylnitrile derivatives, indole derivatives, inoxide derivatives, bisstyryl derivatives, sirol derivatives, and azoline derivatives. In addition, metal complexes having electron-accepting nitrogen may be used, for example, quinolinol-based metal complexes, hydroxyazole complexes such as hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. The aforementioned materials may be used alone, but they may also be mixed with other materials. Among the materials described above, boran derivatives, pyridine derivatives, fluoranthene derivatives, BO-based derivatives, anthracene derivatives, benzofluorene derivatives, phosphine oxide derivatives, pyrimidine derivatives, arylnitrile derivatives, triazine derivatives, benzimidazole derivatives, phenanthroline derivatives, and quinolinol-based metal complexes, thiazole derivatives, benzothiazole derivatives, sirol derivatives, and azoline derivatives are preferred. The polycyclic aromatic compound of the present invention may be used as a material for forming an electron injection layer or a material for forming an electron transport layer. The electron transport layer or electron injection layer may further include a material capable of reducing the material forming the electron transport layer or electron injection layer. Various reducing materials are used as long as they have a certain reducing property, and for example, at least one selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, alkali metal oxides, alkali metal halides, alkaline earth metal oxides, alkaline earth metal halides, rare earth metal oxides, rare earth metal halides, alkali metal organic complexes, alkaline earth metal organic complexes, and rare earth metal organic complexes may be preferably used. Desirable reducing agents include Na (work function 2.36 eV), K (work function 2.28 eV), and R b Examples include alkali metals such as (work function 2.16 eV) or Cs (work function 1.95 eV), or alkaline earth metals such as Ca (work function 2.9 eV), Sr (work function 2.0–2.5 eV), or Ba (work function 2.52 eV), and it is particularly desirable that the work function is 2.9 eV or less. Among these, more preferred reducing materials are K and R b or is an alkali metal of Cs, more preferably R bAlternatively, it is Cs, and the most preferred is Cs. These alkali metals have particularly high reducing power, and by adding a relatively small amount to materials forming an electron transport layer or an electron injection layer, improvements in luminous brightness or extended lifespan in organic electroluminescent devices are achieved. Furthermore, as reducing materials with a work function of 2.9 eV or less, a combination of two or more of these alkali metals is also preferred, and in particular, a combination including Cs, for example, Cs and Na, Cs and K, or Cs and R b , or a combination of Cs, Na, and K is preferred. By including Cs, the reducing ability can be efficiently exerted, and by adding it to a material forming an electron transport layer or an electron injection layer, the luminous brightness of the organic EL device or the lifespan can be improved. 2-1-8. Cathode in an Organic Electroluminescent Device The cathode (108) serves to inject electrons into the light-emitting layer (105) through the electron injection layer (107) and the electron transport layer (106). As for the material forming the negative electrode (108), it is not particularly limited as long as it is a material capable of efficiently injecting electrons into the organic layer, but the same material as the material forming the positive electrode (102) can be used. Among these, metals such as tin, indium, calcium, aluminum, silver, copper, nickel, chromium, gold, platinum, iron, zinc, lithium, sodium, potassium, cesium, and magnesium, or alloys thereof (magnesium-silver alloy, magnesium-indium alloy, aluminum-lithium alloy such as lithium fluoride / aluminum, etc.) are preferred. In order to increase the electron injection efficiency and improve device characteristics, alloys containing lithium, sodium, potassium, cesium, calcium, magnesium, or these low work function metals are effective. However, these low work function metals are generally unstable in the atmosphere. To improve this, for example, a method is known to use a highly stable electrode by doping a small amount of lithium, cesium, or magnesium into the organic layer. Other dopants may include inorganic salts such as lithium fluoride, cesium fluoride, lithium oxide, and cesium oxide. However, they are not limited to these. In addition, for electrode protection, it is preferable to laminate metals such as platinum, gold, silver, copper, iron, tin, aluminum, and indium, or alloys using these metals, as well as inorganic materials such as silica, titania, and silicon nitride, polyvinyl alcohol, vinyl chloride, hydrocarbon-based polymer compounds, etc. The manufacturing method of these electrodes is also not particularly limited as long as it is conductive, such as resistance heating, electron beam deposition, sputtering, ion plating, and coating. 2-1-9. Binding agents that may be used in each layer The materials used for the hole injection layer, hole transport layer, light-emitting layer, electron transport layer, and electron injection layer above can form each layer individually, but they can also be dispersed and used as polymer binders in solvent-soluble resins such as polyvinyl chloride, polycarbonate, polystyrene, poly(N-vinylcarbazole), polymethyl methacrylate, polybutyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethylcellulose, vinyl acetate resin, ABS resin, and polyurethane resin, or curable resins such as phenol resin, xylene resin, petroleum resin, urea resin, melamine resin, unsaturated polyester resin, alkyd resin, epoxy resin, and silicone resin. 2-1-10. Method for Fabricating Organic Electroluminescent Devices Each layer constituting an organic EL device can be formed by creating thin films of the materials required for each layer using methods such as deposition, resistance heating deposition, electron beam deposition, sputtering, molecular stacking, printing, inkjet printing, spin coating, casting, or coating. There are no specific limitations on the film thickness of each layer formed in this way; while it can be appropriately set according to the properties of the material, it is typically in the range of 2 nm to 5,000 nm. Film thickness can usually be measured using a crystal oscillator-type film thickness measuring device. When forming thin films using deposition, the deposition conditions vary depending on the type of material, the desired crystal structure, and the assembly structure of the film. Generally, deposition conditions involve a boat heating temperature of +50 to +400°C and a vacuum level of 10°C. -6 ~10 -3 It is desirable to appropriately set the Pa, deposition rate to 0.01 to 50 nm / sec, substrate temperature to -150 to +300℃, and film thickness to 2 nm to 5 µm. Next, as an example of a method for fabricating an organic EL device, a method for fabricating an organic EL device comprising an anode, a hole injection layer, a hole transport layer, an emitting layer composed of a host material and a dopant material, an electron transport layer, an electron injection layer, and a cathode will be described. After fabricating an anode by forming a thin film of an anode material on a suitable substrate using a deposition method or the like, thin films of a hole injection layer and a hole transport layer are formed on this anode. Then, a thin film of a host material and a dopant material is co-deposited on this to form a thin film to form an emitting layer, an electron transport layer and an electron injection layer are formed on this emitting layer, and a thin film of a cathode material is formed using a deposition method or the like to form a cathode, thereby obtaining a desired organic EL device. Furthermore, in fabricating the organic EL device described above, it is also possible to reverse the fabrication order and fabricate in the order of cathode, electron injection layer, electron transport layer, emitting layer, hole transport layer, hole injection layer, and anode. When a DC voltage is applied to the organic EL device obtained in this way, the positive electrode is applied with the positive polarity and the negative electrode with the negative polarity, and when a voltage of about 2 to 40 V is applied, light emission can be observed from the transparent or translucent electrode side (positive or negative and both sides). In addition, this organic EL device emits light when a pulsed current or an alternating current is applied. In addition, the waveform of the applied alternating current may be arbitrary. 2-1-11. Application Examples of Organic Electroluminescent Devices Organic EL devices can also be applied to display devices or lighting devices. A display device or lighting device equipped with an organic EL element can be manufactured by known methods, such as connecting an organic EL element to a known driving device, and can be driven by appropriately using known driving methods such as direct current driving, pulse driving, and alternating current driving. Examples of display devices include panel displays such as color flat panel displays, flexible displays such as flexible color organic electroluminescent (EL) displays (see, for example, Japanese Patent Publication No. Hei 10-335066, Japanese Patent Publication No. 2003-321546, Japanese Patent Publication No. 2004-281086, etc.). Additionally, as display methods of the display, examples include matrix and / or segment methods. Furthermore, matrix displays and segment displays may coexist within the same panel. In a matrix, pixels for display are arranged two-dimensionally, such as in a grid or mosaic pattern, and characters or images are displayed as a set of pixels. The shape and size of the pixels are determined according to the application. For example, for image and character display in PCs, monitors, and televisions, square pixels with sides of typically 300 μm or less are used, while for large displays such as display panels, pixels with sides on the order of millimeters are used. For monochrome displays, pixels of the same color are arranged, but for color displays, red, green, and blue pixels are arranged to display. In this case, there are typically delta and stripe types. Furthermore, the driving method for this matrix can be either a linear sequential driving method or an active matrix. Although linear sequential driving has the advantage of a simple structure, active matrix may be superior when considering operational characteristics; therefore, it is necessary to use them differently depending on the application. In the segment method (type), a pattern is formed to display predetermined information, and a designated area is illuminated. Examples include the display of time or temperature in digital clocks or thermometers, the display of operating status in audio devices or electronic cookers, and panel displays in automobiles. Examples of lighting devices include lighting devices such as indoor lighting and backlights for liquid crystal displays (see, for example, Japanese Patent Publication No. 2003-257621, Japanese Patent Publication No. 2003-277741, Japanese Patent Publication No. 2004-119211, etc.). Backlights are primarily used to improve the visibility of display devices that do not emit light, and are used in liquid crystal displays, clocks, audio devices, automotive panels, display boards, and signs. In particular, regarding backlights for liquid crystal displays, especially for PCs where thinning is a challenge, considering that conventional methods are made of fluorescent lamps or light guide plates, making thinning difficult, backlights using organic EL elements are characterized by being thin and lightweight. 2-2. Other Organic Devices The polycyclic aromatic compound according to the present invention can be used in the fabrication of organic field-effect transistors or organic thin-film solar cells, in addition to the organic electroluminescent device described above. An organic field-effect transistor is a transistor that controls current using an electric field generated by a voltage input, and it is equipped with a gate electrode in addition to the source and drain electrodes. When a voltage is applied to the gate electrode, an electric field is generated, and it is a transistor that can control current by arbitrarily blocking the flow of electrons (or holes) flowing between the source and drain electrodes. Field-effect transistors are frequently used as components for constructing integrated circuits because they are easier to miniaturize compared to simple transistors (bipolar transistors). The structure of an organic field-effect transistor typically comprises a source electrode and a drain electrode installed in contact with an organic semiconductor active layer formed using a polycyclic aromatic compound according to the present invention, and furthermore, a gate electrode installed with an insulating layer (dielectric layer) in between that is in contact with the organic semiconductor active layer. Examples of such device structures include the following structures. (1) Substrate / gate electrode / insulator layer / source electrode·drain electrode / organic semiconductor active layer (2) Substrate / Gate electrode / Insulator layer / Organic semiconductor active layer / Source electrode·Drain electrode (3) Substrate / Organic semiconductor active layer / Source electrode·Drain electrode / Insulator layer / Gate electrode (4) Substrate / source electrode / drain electrode / organic semiconductor active layer / insulator layer / gate electrode The organic field-effect transistor configured in this way can be applied as a pixel driving switching element for an active matrix-driven liquid crystal monitor or an organic light-emitting diode display. An organic thin-film solar cell has a structure in which an anode, such as ITO, a hole transport layer, a photoelectric conversion layer, an electron transport layer, and a cathode are stacked on a transparent substrate such as glass. The photoelectric conversion layer has a p-type semiconductor layer on the anode side and an n-type semiconductor layer on the cathode side. The polycyclic aromatic compound according to the present invention can be used as a material for the hole transport layer, the p-type semiconductor layer, the n-type semiconductor layer, and the electron transport layer, depending on its physical properties. The polycyclic aromatic compound according to the present invention can function as a hole transport material or an electron transport material in an organic thin-film solar cell. In addition to the above, the organic thin-film solar cell may appropriately include a hole block layer, an electron block layer, an electron injection layer, a hole injection layer, a smoothing layer, etc. In the organic thin-film solar cell, known materials used in organic thin-film solar cells may be appropriately selected and combined. 3. Wavelength conversion element The polycyclic aromatic compound of the present invention can be used as a wavelength conversion material. Currently, the application of multicolor technology based on color conversion methods to liquid crystal monitors, organic EL displays, lighting, and the like is being actively explored. Color conversion refers to the wavelength conversion of light emitted from a light source into longer wavelength light; for example, it involves converting ultraviolet or blue light into green or red light emission. By forming a wavelength conversion material with this color conversion function into a film and combining it, for example, with a blue light source, it becomes possible to extract the three primary colors of blue, green, and red from the blue light source—that is, to extract white light. By using a white light source, which combines such a blue light source with a wavelength conversion film possessing the color conversion function, as a light source unit and combining it with a liquid crystal driver and a color filter, it becomes possible to manufacture a full-color display. Furthermore, if the liquid crystal driver is absent, it can be used directly as a white light source and applied as a white light source, for example, in LED lighting. In addition, by using a blue organic EL element as a light source and combining it with a wavelength conversion film that converts blue light into green and red light, it becomes possible to produce a full-color organic EL display without using a metal mask. Furthermore, by using a blue microLED as a light source and combining it with a wavelength conversion film that converts blue light into green and red light, it becomes possible to produce a low-cost full-color microLED display. The polycyclic aromatic compound of the present invention can be used as a wavelength conversion material. By using a wavelength conversion material containing the polycyclic aromatic compound of the present invention, light from a light source or light-emitting element that generates ultraviolet light or shorter wavelength blue light can be converted into blue light or green light with high color purity suitable for use in a display device (a display device using an organic EL element or a liquid crystal display device). The adjustment of the converted color can be achieved by appropriately selecting a substituent of the polycyclic aromatic compound of the present invention, a binder resin used in the wavelength conversion composition described below, etc. The wavelength conversion material can be prepared as a wavelength conversion composition containing the polycyclic aromatic compound of the present invention. In addition, a wavelength conversion film may be formed using this wavelength conversion composition. The composition for wavelength conversion may include, in addition to the polycyclic aromatic compound of the present invention, a binder resin, other additives, and a solvent. As the binder resin, for example, those described in paragraphs 0173 to 0176 of International Publication No. 2016 / 190283 may be used. As the other additive, compounds described in paragraphs 0177 to 0181 of International Publication No. 2016 / 190283 may be used. As for the solvent, reference may be made to the description of the solvent included in the composition for forming the light-emitting layer above. A wavelength conversion film comprises a wavelength conversion layer formed by curing a composition for wavelength conversion. As a method for producing a wavelength conversion layer from a composition for wavelength conversion, reference may be made to known film formation methods. The wavelength conversion film may consist solely of a wavelength conversion layer formed from a composition containing a polycyclic aromatic compound of the present invention, or it may include other wavelength conversion layers (e.g., a wavelength conversion layer that converts blue light into green light or red light, or a wavelength conversion layer that converts blue light or green light into red light). Furthermore, the wavelength conversion film may include a substrate layer or a barrier layer to prevent degradation of the color conversion layer due to oxygen, moisture, or heat. [Example] The present invention will be explained more specifically below by way of examples, but the present invention is not limited thereto. Meanwhile, in the reaction formula in the example, Me represents methyl, Et represents ethyl, tBu represents t-butyl, and iPr represents isopropyl. In addition, "APCI-MS" stands for Atmospheric Pressure Chemical Ionization Mass Spectrometry, and "MALDI-TOFMS" stands for Matrix-Assisted Laser Deionization Time-of-Flight Mass Spectrometry. <<Synthetic Example>> Synthesis Example (1): Synthesis of compound (1-005) Under a nitrogen atmosphere, N-phenylnaphthalene-1-amine (50.0 g), 1-bromo-3-chlorobenzene (43.7 g), Pd-132 (1.61 g) and tBuONa (32.9 g) as palladium catalysts, and toluene (500 ml) were placed in a flask and stirred at 90°C for 2 hours. After the reaction was finished, water and toluene were added to the reaction mixture and stirred, after which the organic layer was separated and washed with water. Subsequently, the crude product obtained by concentrating the organic layer was purified using a silica gel short-pass column (eluent: toluene / heptane = 1 / 9 (volume ratio)) and further recrystallized from ethanol to obtain 58.7 g of intermediate (Int-1-1-1). Under a nitrogen atmosphere, intermediate (Int-1-1-1) (58.7 g), 2,4-di-t-butylaniline (36.5 g), palladium catalysts Pd-132 (2.52 g) and tBuONa (25.7 g), and toluene (590 ml) were placed in a flask and stirred at reflux temperature for 2 hours. After the reaction was finished, water and toluene were added to the reaction mixture and stirred, after which the organic layer was separated and washed with water. Subsequently, the crude product obtained by concentrating the organic layer was purified using a silica gel short-pass column (eluent: toluene / heptane = 1 / 4 (volume ratio)). Furthermore, it was recrystallized from ethanol to obtain 95.1 g of intermediate (Int-1-1-2). Under a nitrogen atmosphere, intermediate (Int-1-1-2) (50.0 g), 3,4,5-trichloro-1,1'-biphenyl (25.8 g), palladium catalyst Pd-132 (1.41 g), tBuONa (14.5 g), and toluene (500 ml) were placed in a flask and stirred at reflux temperature for 4 hours. After the reaction was finished, water and toluene were added to the reaction mixture and stirred, after which the organic layer was separated and washed with water. Subsequently, the crude product obtained by concentrating the organic layer was purified using a silica gel short-pass column (eluent: toluene / heptane = 1 / 9 (volume ratio)). Furthermore, the mixture was recrystallized from heptane to obtain 49.1 g of intermediate (Int-1-1-3). Under a nitrogen atmosphere, 3-bromo-5-(t-butyl)benzofuran (30.0 g), 4-(tert-butyl)aniline (17.7 g), Pd-132 (1.68 g) and tBuONa (17.1 g) as palladium catalysts, and toluene (300 ml) were placed in a flask and stirred at 90°C for 2 hours. After the reaction was finished, water and toluene were added to the reaction mixture and stirred, after which the organic layer was separated and washed with water. Subsequently, the crude product obtained by concentrating the organic layer was purified by a silica gel shot column (eluent: toluene / heptane = 1 / 4 (volume ratio)) to obtain an intermediate (Int-1-1-4) (35.8 g). Under a nitrogen atmosphere, intermediate (Int-1-1-3) (49.1 g), intermediate (Int-1-1-4) (21.9 g), palladium catalyst Pd-132 (0.966 g), tBuONa (9.83 g), and toluene (500 ml) were placed in a flask and heated at reflux temperature for 3 hours. After the reaction was finished, water and toluene were added to the reaction mixture and stirred, after which the organic layer was separated and washed with water. Subsequently, the crude product obtained by concentrating the organic layer was purified using a silica gel short-pass column (eluent: toluene / heptane = 1 / 4 (volume ratio)) to obtain 61.0 g of intermediate (Int-1-005). To a flask containing intermediate (Int-1-005) (50.0 g) and tert-butylbenzene (tBu-benzene, 500 ml), 1.60 M tert-butyllithium pentane solution (tBuLi, 62.2 ml) was added under a nitrogen atmosphere at 0°C. After the dropwise addition was finished, the temperature was raised to 70°C and stirred for 0.5 hours, after which components with a lower boiling point than tert-butylbenzene were removed by vacuum distillation. The mixture was cooled to -50°C and boron tribromide (24.9 g) was added, and the temperature was raised to room temperature and stirred for 0.5 hours. Afterward, the mixture was cooled again to 0°C and N,N-diisopropylethylamine (iPr2NEt, 12.9 g) was added. The mixture was stirred at room temperature until the exothermic reaction was contained, and then the temperature was raised to 80°C and heated and stirred for 1 hour. The reaction solution was cooled to room temperature, and an aqueous sodium acetate solution chilled in an ice bath was added, followed by the addition of toluene to separate the liquids. After concentrating the organic layer, it was purified using a silica gel short-pass column (eluent: toluene). The obtained crude product was recrystallized from toluene to obtain 6.33 g of compound (1-005). The formation of the target object was confirmed by observing m / z (M+H)=978.60 using APCI-MS. Synthesis Example (2): Synthesis of Compound (1-306) In the same manner as in synthesis example (1), a compound (1-306) was obtained from an intermediate (Int-1-306). The structure of the compound obtained by NMR measurement was confirmed. The formation of the target object was confirmed by observing m / z (M+H) = 1090.72 using APCI-MS. Synthesis Example (3): Synthesis of Compound (1-315) In the same manner as in synthesis example (1), a compound (1-315) was obtained from an intermediate (Int-1-315). The formation of the target object was confirmed by observing m / z (M+H) = 1054.62 using APCI-MS. Synthesis Example (4): Synthesis of Compound (1-145) Compound (1-145) was obtained from an intermediate (Int-1-145) in the same manner as in synthesis example (1). The formation of the target object was confirmed by observing m / z (M+H) = 1036.64 using APCI-MS. Synthesis Example (5): Synthesis of Compound (1-158) In the same manner as in synthesis example (1), a compound (1-158) was obtained from an intermediate (Int-1-158). The formation of the target object was confirmed by observing m / z (M+H) = 1034.65 using APCI-MS. Synthesis Example (6): Synthesis of Compound (1-549) In the same manner as in synthesis example (1), a compound (1-549) was obtained from an intermediate (Int-1-549). The formation of the target object was confirmed by observing m / z (M+H)=1138.56 using APCI-MS. Synthesis Example (7): Synthesis of Compound (1-604) In the same manner as in synthesis example (1), a compound (1-604) was obtained from an intermediate (Int-1-604). The formation of the target object was confirmed by observing m / z (M+H)=978.59 using APCI-MS. Synthesis Example (8): Synthesis of Compound (1-806) In the same manner as in synthesis example (1), a compound (1-806) was obtained from an intermediate (Int-1-806). The formation of the target object was confirmed by observing m / z (M+H) = 1050.63 using APCI-MS. Synthesis Example (9): Synthesis of Compound (1-855) In the same manner as in synthesis example (1), a compound (1-855) was obtained from an intermediate (Int-1-855). The formation of the target object was confirmed by observing m / z (M+H) = 1028.53 using APCI-MS. Synthesis Example (10): Synthesis of Compound (1-859) In the same manner as in synthesis example (1), a compound (1-859) was obtained from an intermediate (Int-1-859). The formation of the target object was confirmed by observing m / z (M+H) = 1104.67 using APCI-MS. Synthesis Example (11): Synthesis of compound (1-1001) In the same manner as in synthesis example (1), a compound (1-1001) was obtained from an intermediate (Int-1-1001). The formation of the target object was confirmed by observing m / z (M+H)=974.59 using APCI-MS. Synthesis Example (12): Synthesis of Compound (1-1304) In the same manner as in synthesis example (1), a compound (1-1304) was obtained from an intermediate (Int-1-1304). The formation of the target object was confirmed by observing m / z (M+H) = 1026.70 using APCI-MS. Synthesis Example (13): Synthesis of Compound (1-1329) In the same manner as in synthesis example (1), a compound (1-1329) was obtained from an intermediate (Int-1-1329). The formation of the target object was confirmed by observing m / z (M+H)=1084.70 using APCI-MS. Synthesis Example (14): Synthesis of Compound (1-546) In the same manner as in synthesis example (1), a compound (1-546) was obtained from an intermediate (Int-1-546). The formation of the target object was confirmed by observing m / z (M+H) = 1048.57 using APCI-MS. Synthesis Example (15): Synthesis of Compound (1-1801) In the same manner as in synthesis example (1), a compound (1-1801) was obtained from an intermediate (Int-1-1801). The formation of the target object was confirmed by observing m / z (M+H) = 1110.66 using APCI-MS. Synthesis Example (16): Synthesis of Compound (1-1807) In the same manner as in synthesis example (1), a compound (1-1807) was obtained from an intermediate (Int-1-1807). The formation of the target object was confirmed by observing m / z (M+H) = 1074.57 using APCI-MS. Synthesis Example (17): Synthesis of Compound (1-1993) In the same manner as in synthesis example (1), a compound (1-1993) was obtained from an intermediate (Int-1-1993). The formation of the target object was confirmed by observing m / z (M+H) = 1180.62 using APCI-MS. Synthesis Example (18): Synthesis of Compound (1-1901) In the same manner as in synthesis example (1), a compound (1-1901) was obtained from an intermediate (Int-1-1901). The formation of the target object was confirmed by observing m / z (M+H) = 1060.60 using APCI-MS. Other compounds of the present invention can be synthesized by appropriately changing the compounds of the raw materials, in a manner similar to the synthesis examples described above. <<Fabrication and Evaluation of Deposition-Type Organic EL Devices>> Next, the fabrication and evaluation of an organic EL device using the polycyclic aromatic compound of the present invention will be described. Composition of Organic EL Devices An organic EL device was manufactured using the polycyclic aromatic compound of the present invention. The material composition of each layer in the organic EL devices of Examples B1 to B18 and Comparative Examples B1 to B11 is shown in Table 1 below. [Table 1] In Tables 1, 2, and 3, “HI”, “HAT-CN”, “HT-1”, “HT-2”, “ET-1”, “ET-2”, “BH”, “Liq”, “Comparative Compounds (1) and (2)” (compounds described in WO2022196612A1), “Comparative Compound (3)” (compounds described in CN116199705A), “Comparative Compound (4)” (compounds described in WO2021194216A1), “Comparative Compounds (5) and (6)” (compounds described in CN118684695A), “Comparative Compound (7)” (compounds described in EP4438607A2), “Comparative Compound (8)” (compounds described in CN117417362A), “Comparative Compound (9)” (compounds described in EP4056577A1), “Comparative The chemical structural formulas of “compound (10)” (compound described in EP4119634A1) and “comparative compound (11)” (compound described in CN117362324A) are shown below. <Element of Example B1> A glass substrate of 26 mm × 28 mm × 0.7 mm (manufactured by Optoscience Co., Ltd.), in which an ITO film of 180 nm thickness is deposited by sputtering and polished to 150 nm, is used as a transparent support substrate. This transparent support substrate is fixed to a substrate holder of a commercially available deposition apparatus (manufactured by Showa Vacuum Co., Ltd.), and a deposition boat made of molybdenum containing HI, HAT-CN, HT-1, HT-2, BH, compound (1-005), ET-1, and ET-2, respectively, and a deposition boat made of aluminum nitride containing Liq, LiF, and aluminum, respectively, are mounted. Each of the following layers was formed sequentially on the ITO film of the transparent support substrate. The vacuum chamber was 5×10 -4 The pressure was reduced to Pa, and first, HI was heated to deposit a film thickness of 40 nm, then HAT-CN was heated to deposit a film thickness of 5 nm, then HT-1 was heated to deposit a film thickness of 45 nm, and then HT-2 was heated to deposit a film thickness of 10 nm, thereby forming a four-layer hole layer. Next, BH and compound (1-005) were heated simultaneously to deposit a film thickness of 25 nm, thereby forming an emissive layer. The deposition rate was adjusted so that the mass ratio of BH and compound (1-005) was approximately 97 to 3. Subsequently, ET-1 was heated to deposit a film thickness of 5 nm, and then ET-2 and Liq were heated simultaneously to deposit a film thickness of 25 nm, thereby forming a two-layer electron layer. The deposition rate was adjusted so that the mass ratio of ET-2 and Liq was approximately 50 to 50. The deposition rate of each layer was 0.01 to 1 nm / sec. Then, LiF was heated and deposited at a deposition rate of 0.01 to 0.1 nm / sec to achieve a film thickness of 1 nm, and subsequently, aluminum was heated and deposited to achieve a film thickness of 100 nm to form a cathode, thereby obtaining an organic EL device. <Elements of Examples B2 to B18 and Comparative Examples B1 to B11> Organic EL devices of Examples B2 to B18 and Comparative Examples B1 to B11 were obtained in the same manner as Example B1, except that each compound listed in Tables 2 and 3 was used as a dopant material instead of compound (1-005). <Evaluation of Organic EL Properties> For the organic EL devices of Examples B1 to B18 and Comparative Examples B1 to B11, a DC voltage was applied using an ITO electrode as the anode and a LiF / aluminum electrode as the cathode, and 1000 cd / m² 2 The driving voltage during luminescence, external quantum efficiency, and device lifetime were measured. Meanwhile, the device lifetime was 1000 cd / m² 2 This is the time during which a luminance of 95% or more of the initial luminance is maintained by continuous driving at the voltage during light emission. The results are shown in Tables 2 and 3. The quantum efficiency of a light-emitting device consists of internal and external quantum efficiency. Internal quantum efficiency represents the rate at which external energy injected as electrons (or holes) into the light-emitting layer is purely converted into photons. On the other hand, external quantum efficiency is calculated based on the amount of photons emitted to the outside of the light-emitting device. Since some of the photons generated in the light-emitting layer are absorbed within the device or continuously reflected, preventing them from being emitted to the outside, the external quantum efficiency is lower than the internal quantum efficiency. The method for measuring external quantum efficiency is as follows. Using the Advantist R6144 voltage / current generator, when the device brightness is 1000 cd / m² 2A voltage is applied to cause the device to emit light. Using a TOPCON SR-3AR spectrophotometer, the spectral radiance in the visible light region was measured in a direction perpendicular to the emission surface. Assuming the emission surface is a perfectly diffuse surface, the value obtained by dividing the measured spectral radiance value of each wavelength component by the wavelength energy and multiplying by π is the number of photons at each wavelength. Next, the number of photons in the observed full-wavelength region is integrated and taken as the total number of photons emitted from the device. The value obtained by dividing the applied current value by the elementary charge is the number of carriers injected into the device, and the value obtained by dividing the total number of photons emitted from the device by the number of carriers injected into the device is the external quantum efficiency. [Table 2] [Table 3] In any device configuration, the compound of the present invention was able to obtain a device having a high external quantum efficiency and, in particular, a long lifespan compared to the compound of the comparative example. [Explanation of the symbol] 100 Organic Electroluminescent Devices 101 board 102 anode 103 Hole injection layer 104 Precision Transport Layer 105 light-emitting layer 106 Electron transport layer 107 electron injection layer 108 cathodes

Claims

A polycyclic aromatic compound having a structure consisting of one or more structural units represented by the following formula (1); Among the (1) foods, Rings A, B, and C are each independently substituted or unsubstituted aryl rings, or substituted or unsubstituted heteroaryl rings, and The D ring is a substituted or unsubstituted naphthalene ring, and Y 1 Silver, B, P, P=O, P=S, Al, Ga, As, Si-R S , or Ge-R Ge and, the above Si-R S of R S and Ge-R Ge of R Ge are, each independently, a substituted or unsubstituted aryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and R NY1 and R NY2 Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, or a substituted or unsubstituted cycloalkyl, provided that at least one has a group represented by formula (a). R NY1 Silver, Ring of A and R 1 It may be joined with at least one of them through a single joint or a connector, and R NY2 It may be coupled to at least one of ring A and ring B through a single bond or a linker, and R 1 ~R 3 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and Among equation (a), A 1 silver, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via a linker or single bond), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via a linker or single bond), substituted or unsubstituted diarylamino (two aryls may be connected to each other via a linker or single bond), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via a linker or single bond), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and R 1a ~ R 4a is hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and * indicates the bonding position with N, The above R 2 , R 3 , R 1a ~R 4a Two adjacent rings in a single benzene ring may be bonded to each other to form a substituted or unsubstituted aryl ring or a substituted or unsubstituted heteroaryl ring together with the said benzene ring, and In the above structure, at least one of the aryl ring or heteroaryl ring may be condensed into at least one cycloalkane, and at least one hydrogen in the said cycloalkane may be substituted. At least one hydrogen in the above structure may be substituted with cyano or halogen, and In the above structure, at least one hydrogen may be replaced with deuterium, and at least one nitrogen may be nitrogen-15 ( 15 It may be substituted with N), and at least one sulfur is sulfur-33( 33 S), Sulfur-34( 34 S) or Sulfur-36( 36 It may be replaced with S), and at least one oxygen is oxygen-17( 17 O) or Oxygen-18( 18 It may be substituted with O), and at least one carbon is carbon-13 ( 13 It may be substituted with C), and at least one boron is boron-11( 11 Even if it is substituted with B) It works. A polycyclic aromatic compound according to claim 1, wherein formula (1) is represented by either formula (1-A) or formula (1-B). Among each of Formula (1-A) and Formula (1-B), Ring A, Ring B, Ring C, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the A ring, B ring, C ring, Y in formula (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and each have the same meaning, R dA1 ~R dA7 and R dB1 ~R dB7 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted arylthio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen, and two adjacent groups are bonded to each other, A cycloalkane may be formed, and at least one hydrogen in the said cycloalkane may be substituted. A polycyclic aromatic compound according to claim 1, wherein formula (1) is represented by any one of formula (1-A-1), formula (1-A-2), formula (1-B-1), or formula (1-B-2). Among each of the formulas (1-A-1), (1-A-2), (1-B-1), and (1-B-2), C ring, Y 1 , R NY1 , R NY2 , and R 1 ~R 3 is the C ring, Y in equation (1). 1 , R NY1 , R NY2 , and R 1 ~R 3 and each have the same meaning, R dA1 ~R dA7 and R dB1 ~R dB7 R in Equation (1-A) and Equation (1-B), independently of each dA1 ~R dA7 and R dB1 ~R dB7 and each have the same meaning, X B neun, >O, >NR NZ , >C(-R CZ )2, >Si(-R IZ )2, >S, or >Se, and R NZ , R CZ , and R IZ are each independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and >C(-R CZ )2's 2 R CZ They may be bonded to each other to form rings, and >Si(-R IZ )2's 2 R IZ They may combine with each other to form a ring, R aA1 ~R aA3 , R bA1 ~R bA4 , R aB1 ~R aB3 and R bB1 ~R bB4 Each is independently hydrogen, deuterium, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted diheteroarylamino (two heteroaryls may be connected to each other via linkers or single bonds), substituted or unsubstituted arylheteroarylamino (an aryl and a heteroaryl may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylamino (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted diarylboryl (two aryls may be connected to each other via linkers or single bonds), substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted aryltio, substituted or unsubstituted alkenyl, substituted silyl, cyano, or halogen. A polycyclic aromatic compound according to claim 1, wherein the C ring is a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted pyrene ring, a substituted or unsubstituted dibenzofuran ring, a substituted or unsubstituted dibenzothiophene ring, a substituted or unsubstituted carbazole ring, or a substituted or unsubstituted fluorene ring. A polycyclic aromatic compound according to claim 1, wherein formula (a) is represented by formulas (a-1) to (a-45). Among equations (a-1) to (a-45), * indicates the bonding position with N, X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As, >NR Nzy of R Nzy , and >C(-R Czy )2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and the above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring, Me is methyl, tBu is t-butyl, tAm is t-amyl, and D is deuterium. In paragraph 1, R described in formula (1) NY1 and R NY2 A polycyclic aromatic compound having groups all represented by formula (a). In paragraph 1, R described in formula (1) NY1 and R NY2 Among them, one party has the energy represented by formula (a), and the other party has formula (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY -b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) and equation (R NY -e-1)~Equation(R NY Polycyclic aromatic compounds represented by any one of -e-15). Equation (R NY -a-1)~Equation(R NY -a-55), formula(R NY -b-1)~Equation(R NY -b-21), formula(R NY -c-1)~Equation(R NY -c-20), formula(R NY -d-1)~Equation(R NY -d-25) or expression(R NY -e-1)~Equation(R NY -e-15)m, X y neun, >O, >NR Nzy , >C(-R Czy )2, or >S and X y As, >NR Nzy of R Nzy , and >C(-R Czy )2's R Czy Each is independently hydrogen, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, or a substituted or unsubstituted cycloalkyl, and the above >C(-R Czy )2's 2 R Czy They may combine with each other to form a ring, R e11 ~R e17 , R e21 ~R e27 , and R e31 ~R e37 Each is independently hydrogen, deuterium, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted alkyl, a substituted or unsubstituted diarylamino, a substituted or unsubstituted cycloalkyl, or a substituted silyl, and Ak is a substituted or unsubstituted alkyl, and Me is methyl, D is deuterium, and * indicates the bonding position with N. In paragraph 1, R in formula (1) NY1 and R NY2 Either one of them has a group selected from Equation (a-4), Equation (a-9), Equation (a-10), Equation (a-13), Equation (a-14), Equation (a-19), Equation (a-20), Equation (a-29), or Equation (a-30), and the other side has Equation (R NY -e-4)~Equation(R NY A polycyclic aromatic compound having a group selected from -e-15). In claim 1, a polycyclic aromatic compound represented by any one of the following formulas; A material for an organic device containing a polycyclic aromatic compound described in any one of claims 1 to 9. An organic electroluminescent device comprising a pair of electrodes consisting of an anode and a cathode, and a light-emitting layer disposed between the pair of electrodes, wherein the light-emitting layer contains a polycyclic aromatic compound described in any one of claims 1 to 9. An organic electroluminescent device according to claim 11, wherein the light-emitting layer comprises a host and the polycyclic aromatic compound as a dopant. An organic electroluminescent device according to claim 12, wherein the host is an anthracene compound, a fluorene compound, a dibenzochrycene compound, or a pyrene compound. A display device or lighting device equipped with an organic electroluminescent element as described in paragraph 11.

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