ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT COMPOUND THEREFOR

Abstract

The present disclosure relates to an organic electroluminescent device. By incorporating a compound and / or an organic electroluminescent material according to the present disclosure, an organic electroluminescent device with higher luminous efficacy and / or longer lifetime can be provided compared to conventional organic electroluminescent devices.

Description

Technical FieldThe present disclosure relates to an organic electroluminescent device and an organic electroluminescent compound thereof.Prior ArtThe green-emitting small molecule organic electroluminescent device (OLED) with TPD / Alq 3- bilayer consisting of a light-emitting layer and a charge transport layer was first developed by Tang et al. of Eastman Kodak in 1987. Thereafter, studies on organic electroluminescent devices have rapidly advanced and since then OLEDs have been commercialized. Currently, OLEDs mainly use phosphorescent materials having excellent screen-type luminous efficacy. Therefore, for long-term applications and high display resolution, an OLED with high light efficiency and / or long lifetime is required.Korean Patent No. 10-2306966 discloses an organic electroluminescent device comprising a compound having phenanthroline oxazole or phenanthroline as a main nucleus and a phenanthroline derivative as a host material, but does not specifically disclose an organic electroluminescent device having improved performance such as high luminous efficiency and / or long life by using a specific combination of compounds as an electron blocking layer and a host material for a light emitting layer as in the present disclosure.Disclosure of the InventionTechnical TaskIt is an object of the present disclosure to provide a compound effective for producing organic electroluminescent devices having high luminous efficiency and / or long life and an organic electroluminescent material comprising the same.Solution of the ProblemAs a result of intensive studies to achieve the above technical object, it has been found in the present invention that the above object can be achieved by an organic electroluminescent device comprising: a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and at least one electron blocking layer between the first electrode and the light emitting layer, wherein the electron blocking layer comprises a compound represented by the following formula 1 and the light emitting layer comprises at least two kinds of compounds, thereby completing the present invention. In this case, it holds true that in formula 1 R 1 to R 10 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring comprising an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl or *-L 1- N(Ar 1)( Ar 2) with the proviso that at least one of R 1 to R 10*- is L 1- N(Ar 1)( Ar 2); L 1 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 1 and Ar 2 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl.Advantageous Effects of the InventionBy including a compound according to the present disclosure and / or an organic electroluminescent material comprising the same, an organic electroluminescent device having high luminous efficiency and / or long life can be provided.Embodiment of the InventionHereinafter, the present disclosure will be described in detail. The following description, however, is intended to illustrate the invention and not to limit the scope of the present disclosure in any way.The organic electroluminescent device according to the present disclosure includes a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and at least one electron blocking layer between the first electrode and the light emitting layer, wherein the electron blocking layer includes a compound represented by the following formula 1, and the light emitting layer includes at least two kinds of compounds.The organic electroluminescent device according to the present disclosure includes at least one hole auxiliary layer between the first electrode and the electron blocking layer.The light emitting layer according to the present disclosure includes at least one compound represented by Formula 2 and at least one compound represented by Formula 3.The present disclosure provides an organic electroluminescent compound represented by Formula 1-1 as a compound for an organic electroluminescent device and an organic electroluminescent device comprising the same.The present disclosure provides an organic electroluminescent compound represented by Formula 3' as a compound for an organic electroluminescent device and an organic electroluminescent device comprising the same.Here, the term "organic electroluminescent compound" in the present disclosure means a compound that can be used in an organic electroluminescent device and can be contained in any material layer constituting an organic electroluminescent device as needed.The term "organic electroluminescent material" as used herein means a material that can be used in an organic electroluminescent device and can comprise at least one compound. The organic electroluminescent material may be contained in any layer constituting an organic electroluminescent device as needed. For example, the organic electroluminescent material may be a hole injection material, a hole transport material, a hole assist material, a light emitting assist material, an electron blocking material, a light emitting material (containing host and dopant materials), an electron buffer material, a hole blocking material, an electron transport material or an electron injection material, etc.The term "multiple organic electroluminescent materials" in the present disclosure means an organic electroluminescent material comprising a combination of at least two compounds that may be contained in any layer constituting an organic electroluminescent device. It may mean both a material before inclusion in an organic electroluminescent device (e.g., before vapor deposition) and a material after inclusion in an organic electroluminescent device (e.g., after vapor deposition). For example, a plurality of organic electroluminescent materials may be a combination of at least two compounds which may be contained in a hole injection layer, a hole transport layer, a hole auxiliary layer, a light-emitting auxiliary layer, an electron blocking layer, a light-emitting layer, an electron buffer layer, a hole blocking layer, an electron transport layer and / or an electron injection layer. Therefore, at least two compounds may be incorporated into the same layer or different layers and, for example, evaporated as a mixture or coevaporated or individually evaporated.Here, the term "plural host materials" means an organic electroluminescent material comprising a combination of at least two host materials. It may mean both a material before inclusion in an organic electroluminescent device (e.g., before vapor deposition) and a material after inclusion in an organic electroluminescent device (e.g., after vapor deposition). Multiple host materials of the present disclosure may be included in any light emitting layer from which an organic electroluminescent device is constructed. The at least two compounds contained in a plurality of host materials may be incorporated together into a light emitting layer or may be incorporated into separate light emitting layers, respectively. When at least two compounds are contained in a light emitting layer, the at least two compounds may be evaporated as a mixture to form a layer or may be evaporated singly and simultaneously together to form a layer."(C1-C30)alkyl(s)" herein means a linear or branched alkyl having 1 to 30 carbon atoms constituting the chain, the number of carbon atoms being preferably 1 to 20, and more preferably 1 to 10. The above alkyl may include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, etc. As used herein, "(C3-C30)cycloalkyl(s)" means a mono- or polycyclic hydrocarbon having 3 to 30 ring skeleton carbon atoms, the number of carbon atoms being preferably 3 to 20, and more preferably 3 to 7. The above cycloalkyl may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclopentylmethyl, cyclohexylmethyl, etc. The "(3- to 7-membered)heterocycloalkyl" in the present disclosure means a cycloalkyl having 3 to 7 ring skeleton atoms, preferably 5 to 7 ring skeleton atoms, and at least one heteroatom selected from the group consisting of B, N, O, S, Si, and P, and preferably the group consisting of O, S, and N, and includes tetrahydrofuran, pyrrolidine, thiolane, tetrahydropyran, etc. The "(C6-C30)aryl(s)" in the present disclosure means a monocyclic or fused ring residue derived from an aromatic hydrocarbon having 6 to 30 ring skeleton carbon atoms, the number of ring skeleton carbon atoms being preferably 6 to 20, and more preferably 6 to 15. The above aryl may be partially saturated and may comprise a spiro structure. Examples of the aryl are specifically phenyl, biphenyl, terphenyl, quaterphenyl, naphthyl, binaphthyl, phenylnaphthyl, naphthylphenyl, fluorenyl, phenyl fluorenyl, dimethyl fluorenyl, diphenyl fluorenyl, benzo fluorenyl, diphenyl benzobenzo fluorenyl, dibenzo fluorenyl, phenanthrenyl, benzophenanthrenyl, phenylphenanthrenyl, anthracenyl, benzoanthraceneyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, peryleneyl, chrysenyl, benzochrysenyl, naphthacenyl, fluoranthenyl, benzofluoranthrenyl, tolyl, xylyl, mesityl, cumenyl, spiro[fluorene-fluorene]yl, More specifically, the aryl may be o-tolyl, m-tolyl, p-tolyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesityl, o-cumenyl, m-cumenyl, p-cumenyl, p-cumenyl, p-t-butylphenyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4"-t-butyl-p-terphenyl-4-yl, o-biphenyl, m-biphenyl, p-biphenyl, o-terphenyl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-3-yl, p-terphenyl-3-yl, p-Terphenyl-2-yl, m-quaterphenyl, 1-naphthyl, 2-naphthyl, 1-fluorenyl, 2-fluorenyl, 3-fluorenyl, 4-fluorenyl, 9-fluorenyl, 9,9-dimethyl-1-fluorenyl, 9,9-dimethyl-2-fluorenyl, 9,9-dimethyl-3-fluorenyl, 9,9-dimethyl-4-fluorenyl, 9,9-diphenyl-1-fluorenyl, 9,9-diphenyl-2-fluorenyl, 9,9-diphenyl-3-fluorenyl, 9,9-diphenyl-4-fluorenyl, 1-anthryl, 2-anthryl, 9-anthryl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl, 9-phenanthryl, 1-chrysenyl, 2-chrysenyl, 3-chrysenyl, 4-chrysenyl, 5-chrysenyl, 6-chrysenyl, Benzo[c]phenanthryl Benzo[g]chrysenyl 1-triphenylenyl, 2-triphenylenyl, 3-triphenylenyl, 4-triphenylenyl, 3-fluoranthenyl, 4-fluoranthenyl, 8-fluoranthenyl, 9-fluoranthenyl, benzofluoranthenyl, 11,11-dimethyl-1-benzo[a]fluorenyl, 11,11-dimethyl-2-benzo[a]fluorenyl, 11,11-dimethyl-3-benzo[a]fluorenyl, 11,11-dimethyl-4-benzo[a]fluorenyl, 11,11-dimethyl-5-benzo[a]fluorenyl, 11,11-dimethyl-6-benzo[a]fluorenyl, 11,11-dimethyl-7-benzo[a]fluorenyl, 11,11-Dimethyl-8-benzo[a] fluorenyl, 11,11-dimethyl-9-benzo[a] fluorenyl, 11,11-dimethyl-10-benzo[a] fluorenyl, 11,11-dimethyl-1-benzo[b] fluorenyl, 11,11-dimethyl-2-benzo[b] fluorenyl, 11,11-dimethyl-3-benzo[b] fluorenyl, 11,11-dimethyl-4-benzo[b] fluorenyl, 11,11-dimethyl-5-benzo[b] fluorenyl, 11,11-dimethyl-6-benzo[b] fluorenyl, 11,11-dimethyl-7-benzo[b] fluorenyl, 11,11-dimethyl-8-benzo[b] fluorenyl, 11,11-dimethyl-9-benzo[b] fluorenyl, 11,11-dimethyl-10-benzo[b] fluorenyl, 11,11-dimethyl-1-benzo[c] fluorenyl, 11,11-Dimethyl-2-benzo[c] fluorenyl, 11,11-dimethyl-3-benzo[c] fluorenyl, 11,11-dimethyl-4-benzo[c] fluorenyl, 11,11-dimethyl-5-benzo[c] fluorenyl, 11,11-dimethyl-6-benzo[c] fluorenyl, 11,11-dimethyl-7-benzo[c] fluorenyl, 11,11-dimethyl-8-benzo[c] fluorenyl, 11,11-dimethyl-9-benzo[c] fluorenyl, 11,11-dimethyl-10-benzo[c] fluorenyl, 11,11-diphenyl-1-benzo[a] fluorenyl, 11,11-diphenyl-2-benzo[a] fluorenyl, 11,11-diphenyl-3-benzo[a] fluorenyl, 11,11-diphenyl-4-benzo[a] fluorenyl, 11,11-diphenyl-5-benzo[a] fluorenyl, 11,11-Diphenyl-6-benzo[a] fluorenyl, 11,11-diphenyl-7-benzo[a] fluorenyl, 11,11-diphenyl-8-benzo[a] fluorenyl, 11,11-diphenyl-9-benzo[a] fluorenyl, 11,11-diphenyl-10-benzo[a] fluorenyl, 11,11-diphenyl-1-benzo[b] fluorenyl, 11,11-diphenyl-2-benzo[b] fluorenyl, 11,11-diphenyl-3-benzo[b] fluorenyl, 11,11-diphenyl-4-benzo[b] fluorenyl, 11,11-diphenyl-5-benzo[b] fluorenyl, 11,11-diphenyl-6-benzo[b] fluorenyl, 11,11-diphenyl-7-benzo[b] fluorenyl, 11,11-diphenyl-8-benzo[b] fluorenyl, 11,11-diphenyl-9-benzo[b] fluorenyl, 11,11-diphenyl-9-benzo[b] fluorenyl, 11,11-Diphenyl-10-benzo[b] fluorenyl, 11,11-diphenyl-1-benzo[c] fluorenyl, 11,11-diphenyl-2-benzo[c] fluorenyl, 11,11-diphenyl-3-benzo[c] fluorenyl, 11,11-diphenyl-4-benzo[c] fluorenyl, 11,11-diphenyl-5-benzo[c] fluorenyl, 11,11-diphenyl-6-benzo[c] fluorenyl, 11,11-diphenyl-7-benzo[c] fluorenyl, 11,11-diphenyl-8-benzo[c] fluorenyl, 11,11-diphenyl-9-benzo[c] fluorenyl, 11,11-diphenyl-10-benzo[c] fluorenyl, 9,9,10,10-tetramethyl-9,10-dihydro-1-phenanthrenyl, 9,9,10,10-tetramethyl-9,10-dihydro-2-phenanthrenyl, 9,10,10-tetramethyl-9,10-dihydro-3-phenanthrenyl, 9,9,10,10-tetramethyl-9,10-dihydro-4-phenanthrenyl, etc. The "(3- to 30-membered)heteroaryl(s)" in the present disclosure is an aryl having 3 to 30 ring skeleton atoms and at least one heteroatom selected from the group consisting of B, N, O, S, Si, P, Se, and Ge, in which the number of ring skeleton atoms is preferably 5 to 25. The number of hetero atoms in the heteroaryl is preferably 1 to 4. The above heteroaryl may be a monocyclic ring or a fused ring condensed with at least one benzene ring, and may be partially saturated. In addition, the above heteroaryl may be a heteroaryl formed by linking at least one heteroaryl or aryl group to a heteroaryl group via one or more single bonds. Examples of the heteroaryl are specifically a monocyclic ring-type heteroaryl including furyl, thiophenyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrzinyl, triazolyl, tetrazolyl, frazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, etc., and an fused ring-type heteroaryl including benzofuranyl, benzothiophenyl, isobenzofuranyl, dibenzofuranyl, dibenzothiophenyl, dibenzoselenophenyl, benzofuroquinolinyl, benzofuroquinazolinyl, Benzofuronaphthiridinyl benzofuropyrimidinyl, A naphthofuropyrimidinyl, benzothienoquinolinyl, benzothienoquinazolinyl, Benzothienonaphthiridinyl benzothienopyrimidinyl, naphthothienopyrimidinyl, pyrimidoindolyl, benzopyrimidoindolyl, benzofuropyrazinyl, naphthofuropyrazinyl, benzothienopyrazinyl, naphthothienopyrazinyl, pyrazinoindolyl, benzopyrazinoindolyl, benzoimidazolyl, benzothiazolyl, benzoisothiazolyl, benzoisoxazolyl, benzoxazolyl, imidazopyridinyl, isoindolyl, indolyl, benzoindolyl, indazolyl, benzothiadiazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, Quinoxalinyl, carbazolyl, azacarbazolyl, benzocarbazolyl, dibenzocarbazolyl, phenoxazinyl, phenanthridinyl, benzodioxolyl, indolizidinyl, acridiniumyl, silafluorenyl, germafluorenyl, benzotriazolyl, phenazinyl, imidazopyridinyl, chromenoquinazolinyl, thiochromenoquinazolinyl, dimethylbenzopyrimidinyl, indolocarbazolyl, indenocarbazolyl, etc. More specifically, the heteroaryl may be 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, 2-pyrimidinyl, 4-pyrimidinyl, 5-pyrimidinyl, 6-pyrimidinyl, 1,2,3-triazin-4-yl, 1,2,4-triazin-3-yl, 1,3,5-Triazin-2-yl, 1-imidazolyl, 2-imidazolyl, 1-pyrazolyl, 1-indolizidinyl, 2-indolizidinyl, 3-indolizidinyl, 5-indolizidinyl, 6-indolizidinyl, 7-indolizidinyl, 8-indolizidinyl, 2-imidazopyridinyl, 3-imidazopyridinyl, 5-imidazopyridinyl, 6-imidazopyridinyl, 7-imidazopyridinyl, 8-imidazopyridinyl, 1-indolyl, 2-indolyl, 3-indolyl, 4-indolyl, 5-indolyl, 6-indolyl, 7-indolyl, 1-isoindolyl, 2-isoindolyl, 3-isoindolyl, 4-isoindolyl, 5-isoindolyl, 6-isoindolyl, 7-isoindolyl, 2-furyl, 3-furyl, 2-benzofuranyl, 3-benzofuranyl, 4-benzofuranyl, 5-benzofuranyl, 6-benzofuranyl, 7-benzofuranyl, 1-isobenzofuranyl, 3-isobenzofuranyl, 4-isobenzofuranyl, 5-isobenzofuranyl, 6-isobenzofuranyl, 7-isobenzofuranyl, 2-quinolyl, 3-quinolyl, 4-quinolyl, 5-quinolyl, 6-quinolyl, 7-quinolyl, 8-quinolyl, 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 5-isoquinolyl, 6-isoquinolyl, 7-isoquinolyl, 8-isoquinolyl, 2-quinoxalinyl, 5-quinoxalinyl, 6-quinoxalinyl, 1-carbazolyl, 2-carbazolyl, 3-carbazolyl, 4-carbazolyl, 9-carbazolyl, azacarbazol-1-yl, azacarbazol-2-yl, azacarbazol-3-yl, azacarbazol-4-yl, azacarbazol-5-yl, azacarbazol-6-yl, azacarbazol-7-yl, azacarbazol-8-yl, azacarbazol-9-yl, 1-phenanthridinyl, 2-phenanthridinyl, 3-phenanthridinyl, 4-phenanthridinyl, 6-phenanthridinyl, 7-phenanthridinyl, 8-phenanthridinyl, 9-phenanthridinyl, 10-phenanthridinyl, 1-acridiniumyl, 2-acridiniumyl, 3-acridiniumyl, 4-acridiniumyl, 9-acridiniumyl, 2-oxazolyl, 4-Oxazolyl, 5-oxazolyl, 2-oxadiazolyl, 5-oxadiazolyl, 3-frazanyl, 2-thienyl, 3-thienyl, 2-methylpyrrol-1-yl, 2-methylpyrrol-3-yl, 2-methylpyrrol-4-yl, 2-methylpyrrol-5-yl, 3-methylpyrrol-1-yl, 3-methylpyrrol-2-yl, 3-methylpyrrol-4-yl, 3-methylpyrrol-5-yl, 2-t-butylpyrrol-4-yl, 3-(2-phenylpropyl)pyrrol-1-yl, 2-methyl-1-indolyl, 4-methyl-1-indolyl, 2-methyl-3-indolyl, 4-methyl-3-indolyl, 2-t-butyl-1-indolyl, 4-t-butyl-1-indolyl, 2-t-butyl-3-indolyl, 4-t-butyl-3-indolyl, 4-t-butyl-3-indolyl, 1-Dibenzofuranyl, 2-dibenzofuranyl, 3-dibenzofuranyl, 4-dibenzofuranyl, 1-dibenzothiophenyl, 2-dibenzothiophenyl, 3-dibenzothiophenyl, 4-dibenzothiophenyl, 1-naphtho[1,2-b]benzofuranyl, 2-naphtho[1,2-b]benzofuranyl, 3-naphtho[1,2-b]benzofuranyl, 4-naphtho[1,2-b]benzofuranyl, 5-naphtho[1,2-b]benzofuranyl, 6-naphtho[1,2-b]benzofuranyl, 7-naphtho[1,2-b]benzofuranyl, 8-naphtho[1,2-b]benzofuranyl, 9-naphtho[1,2-b]benzofuranyl, 10-naphtho[1,2-b]benzofuranyl, 1-naphtho[2,3-b]benzofuranyl, 2-Naphtho[2,3-b]-benzofuranyl, 3-naphtho[2,3-b]-benzofuranyl, 4-naphtho[2,3-b]-benzofuranyl, 5-naphtho[2,3-b]-benzofuranyl, 6-naphtho[2,3-b]-benzofuranyl, 7-naphtho[2,3-b]-benzofuranyl, 8-naphtho[2,3-b]-benzofuranyl, 9-naphtho[2,3-b]-benzofuranyl, 10-naphtho[2,3-b]-benzofuranyl, 1-naphtho[2,1-b]-benzofuranyl, 2-naphtho[2,1-b]-benzofuranyl, 3-naphtho[2,1-b]-benzofuranyl, 4-naphtho[2,1-b]-benzofuranyl, 5-naphtho[2,1-b]-benzofuranyl, 6-naphtho[2,1-b]-benzofuranyl, 7-Naphtho[2,1-b]-benzofuranyl, 8-naphtho[2,1-b]-benzofuranyl, 9-naphtho[2,1-b]-benzofuranyl, 10-naphtho[2,1-b]-benzofuranyl, 1-naphtho[1,2-b]-benzothiophenyl, 2-naphtho[1,2-b]-benzothiophenyl, 3-naphtho[1,2-b]-benzothiophenyl, 4-naphtho[1,2-b]-benzothiophenyl, 5-naphtho[1,2-b]-benzothiophenyl, 6-naphtho[1,2-b]-benzothiophenyl, 7-naphtho[1,2-b]-benzothiophenyl, 8-naphtho[1,2-b]-benzothiophenyl, 9-naphtho[1,2-b]-benzothiophenyl, 10-naphtho[1,2-b]-benzothiophenyl, 1-naphtho[2,3-b]-benzothiophenyl, 2-Naphtho[2,3-b]-benzothiophenyl, 3-naphtho[2,3-b]-benzothiophenyl, 4-naphtho[2,3-b]-benzothiophenyl, 5-naphtho[2,3-b]-benzothiophenyl, 1-naphtho[2,1-b]-benzothiophenyl, 2-naphtho[2,1-b]-benzothiophenyl, 3-naphtho[2,1-b]-benzothiophenyl, 4-naphtho[2,1-b]-benzothiophenyl, 5-naphtho[2,1-b]-benzothiophenyl, 6-naphtho[2,1-b]-benzothiophenyl, 7-naphtho[2,1-b]-benzothiophenyl, 8-naphtho[2,1-b]-benzothiophenyl, 9-naphtho[2,1-b]-benzothiophenyl, 10-naphtho[2,1-b]-benzothiophenyl, 2-benzofuro[3,2-d]pyrimidinyl, 6-Benzofuro[3,2-d]pyrimidinyl, 7-benzofuro[3,2-d]pyrimidinyl, 8-benzofuro[3,2-d]pyrimidinyl, 9-benzofuro[3,2-d]pyrimidinyl, 2-benzothio[3,2-d]pyrimidinyl, 6-benzothio[3,2-d]pyrimidinyl, 7-benzothio[3,2-d]pyrimidinyl, 8-benzothio[3,2-d]pyrimidinyl, 9-benzothio[3,2-d]pyrimidinyl, 2-benzofuro[3,2-d]pyrazinyl, 6-benzofuro[3,2-d]pyrazinyl, 7-benzofuro[3,2-d]pyrazinyl, 8-benzofuro[3,2-d]pyrazinyl, 9-benzofuro[3,2-d]pyrazinyl, 2-benzothio[3,2-d]pyrazinyl, 6-Benzothio[3,2-d]pyrazinyl, 7-benzothio[3,2-d]pyrazinyl, 8-benzothio[3,2-d]pyrazinyl, 9-benzothio[3,2-d]pyrazinyl, 1-silafluorenyl, 2-silafluorenyl, 3-silafluorenyl, 4-silafluorenyl, 1-germafluorenyl, 2-germafluorenyl, 3-germafluorenyl, 4-germafluorenyl, 1-dibenzoselenophenyl, 2-dibenzoselenophenyl, 3-dibenzoselenophenyl, 4-dibenzoselenophenyl, etc. In addition, "heteroaryl(s)" may be classified as a heteroaryl(s) having electron properties or as a heteroaryl(s) having hole properties. A heteroaryl(s) having electron properties is a substituent that is relatively electron-rich in the underlying nucleus, and may be, for example, a substituted or unsubstituted pyridinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted quinoxalinyl, or a substituted or unsubstituted quinolyl, etc. A heteroaryl(s) having hole properties is a substituent that is relatively electron-deficient in the underlying core, and may be, for example, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted dibenzofuranyl, or a substituted or unsubstituted dibenzothiophenyl. Here, "an fused ring of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring" means a ring formed by fusing at least one aliphatic ring having 3 to 30 ring skeleton carbon atoms, the number of carbon atoms being preferably 3 to 25, more preferably 3 to 18, and at least one aromatic ring having 6 to 30 ring skeleton carbon atoms, the number of carbon atoms being preferably 6 to 25, more preferably 6 to 18. For example, the fused ring may be a fused ring of at least one benzene and at least one cyclohexane or a fused ring of at least one naphthalene and at least one cyclopentane, etc. Here, the carbon atoms in the fused ring of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring may be replaced with at least one heteroatom selected from B, N, O, S, Si and P, preferably at least one heteroatom selected from N, O and S. The "halogen" in the present disclosure includes F, Cl, Br, and I.In addition, "ortho-" ("o-"), "meta-" ("m-"), and "para-" ("p-") are intended to refer to the substitution position of all substituents. An ortho configuration describes a compound having substituents adjacent to each other, e.g., at positions 1 and 2 on benzene. A meta configuration describes the next substitution position of the immediately adjacent substitution position, e.g. a compound having substituents at positions 1 and 3 on benzene. A para configuration shows the next substitution position of the meta position, e.g., a compound having substituents at positions 1 and 4 on benzene.Here, "a ring formed when linked to an adjacent substituent" means a substituted or unsubstituted (3- to 30-membered) mono- or polycyclic alicyclic aromatic ring formed by linking or linking two or more adjacent substituents, or a combination thereof, and this may preferably be a substituted or unsubstituted (3- to 26-membered) mono- or polycyclic alicyclic aromatic ring, or a combination thereof. Further, the formed ring may contain at least one heteroatom selected from the group consisting of B, N, O, S, Si and P, preferably N, O and S. According to one embodiment of the present disclosure, the number of ring skeleton atoms is 5 to 20; according to another embodiment of the present disclosure, the number of ring skeleton atoms is 5 to 15. In one embodiment, the fused ring may be, for example, a substituted or unsubstituted dibenzothiophene ring, a substituted or unsubstituted dibenzofuran ring, a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted fluorene ring, a substituted or unsubstituted benzothiophene ring, a substituted or unsubstituted benzofuran ring, a substituted or unsubstituted indole ring, a substituted or unsubstituted indene ring, a substituted or unsubstituted benzene ring, or a substituted or unsubstituted carbazole ring, etc.In addition, the term "substituted" in the term "substituted or unsubstituted" means that a hydrogen atom in a certain functional group is replaced with another atom or a functional group, i.e., a substituent. Unless otherwise stated, the substituents at positions where the substituents may be substituted may not be limited to hydrogen, and when two or more hydrogen atoms are replaced with a substituent, the substituents may be the same or different from each other. It also includes that the hydrogen atom is replaced by a group formed by a linkage of two or more substituents of the above substituents. For example, the "group formed by a linkage of two or more substituents" may be pyridine-triazine. That is, pyridine-triazine may be heteroaryl or interpreted as a substituent in which two heteroaryl groups are linked. For example, in the present disclosure, "phenylnaphthyl" means naphthalene substituted by a phenyl group and "naphthylphenyl" means benzene substituted by a naphthyl group. Preferably, the substituted alkyl, substituted alkenyl, substituted cycloalkyl, substituted heterocycloalkyl, substituted aryl(s), substituted heteroaryl(s), substituted alkoxy, substituted trialkylsilyl, substituted dialkylarylsilyl, substituted alkyldiarylsilyl, substituted triarylsilyl, substituted mono- or dialkylamino, substituted mono- or diarylamino, substituted alkylarylamino, and substituted fused ring of an aliphatic ring and an aromatic ring in the formulas of the present disclosure may each independently be replaced by at least one selected from the group consisting of: deuterium; halogen; cyano; carboxyl; nitro; hydroxyl; (C1-C30)alkyl; halo-(C1-C30)alkyl; (C2-C30)alkenyl; (C2-C30)alkynyl; (C1-C30)alkoxy; (C1-C30)alkylthio; (C3-C30)cycloalkyl; (C3-C30)cycloalkenyl; (3- to 7-membered)heterocycloalkyl; (C6-C30)aryloxy; (C6-C30)arylthio; (3- to 30-membered)heteroaryl unsubstituted or substituted by at least one (C6-C30)aryl; (C6-C30)aryl unsubstituted or substituted by at least one of (C1-C30)alkyl and (3- to 30-membered)heteroaryl; tri-(C1-C30)alkylsilyl; tri-(C6-C30)arylsilyl; di-(C1-C30)alkyl-(C6-C30)arylsilyl; (C1-C30)alkyldi-(C6-C30)arylsilyl; tri-(C6-C30)arylgermanyl; amino; mono- or di-(C1-C30)alkylamino; mono- or di-(C2-C30)alkenylamino; mono- or di-(C6-C30)arylamino which is unsubstituted or substituted by (C1-C30)alkyl; mono- or di-(3- to 30-membered)heteroarylamino; (C1-C30)alkyl-(C2-C30)alkenylamino; (C1-C30)alkyl-(C6-C30)arylamino; (C1-C30)alkyl-(3- to 30-membered)-heteroarylamino; (C2-C30)alkenyl-(C6-C30)arylamino; (C2-C30)alkenyl-(3- to 30-membered)-heteroarylamino; (C6-C30)aryl(3- to 30-membered)-heteroarylamino; (C1-C30)alkylcarbonyl; (C1-C30)alkoxycarbonyl; (C6-C30)arylcarbonyl; di-(C6-C30)arylboronyl; di(C1-C30)alkylboronyl; (C1-C30)alkyl-(C6-C30)arylboronyl; (C6-C30)-Ar-(C1-C30)-alkyl and (C1-C30)-alkyl-(C6-C30)-aryl, etc. can be substituted. For example, the substituents may be substituted by deuterium, cyano, methyl, phenyl, naphthyl, triphenylsilyl, pyridyl, dibenzofuranyl or dibenzothiophenyl, etc.When a substituent is not shown in the chemical formula or the compound structure of the present disclosure, this may mean that all positions that may be present as substituents are hydrogen or deuterium. That is, in the case of deuterium, an isotope of hydrogen, some hydrogen atoms may be deuterium, which is an isotope, and the deuterium content may be 0% to 100%. In the case where a substituent is not shown in the chemical formula or the compound structure of the present disclosure, if deuterium is not expressly excluded, hydrogen and deuterium may be mixed and used in the compound, such as when the content of deuterium is 0%, the content of hydrogen is 100%, and all the substituents are hydrogen. The deuterium is an element having a deuteron consisting of a proton and a neutron as an atomic nucleus which is one of isotopes of hydrogen and may be represented by hydrogen-2, and the element symbol may be D or 2 H. The isotope having the same atomic number (Z) and a different mass number (A) can also be interpreted as an element having the same number of protons and the different number of neutrons.Here, "combinations thereof" means that one or more of the components of the corresponding list are combined to form a known or chemically stable arrangement that one skilled in the art could devise from the corresponding list. For example, alkyl and deuterium can be combined to form partially or fully deuterated alkyl groups; halogen and alkyl can be combined to form halogenated alkyl substituents; and halogen, alkyl and aryl can be combined to form halogenated arylalkyl. For example, preferred combinations of substituents may contain up to 50 atoms excluding hydrogen and deuterium, or may contain up to 40 atoms excluding hydrogen and deuterium, or may contain up to 30 atoms excluding hydrogen and deuterium, or in many cases, preferred combinations of substituents may contain up to 20 atoms excluding hydrogen and deuterium.In the formulae of the present disclosure, when a plurality of substituents are indicated by the same symbol, each of the substituents represented by the same symbol may be the same or different from each other.Hereinafter, the organic electroluminescent device according to an embodiment will be described in detail.The organic electroluminescent device according to the present disclosure includes a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and at least one electron blocking layer between the first electrode and the light emitting layer, wherein the electron blocking layer includes a compound represented by the following formula 1, and the light emitting layer includes at least two kinds of compounds. In this case, it holds true that in formula 1 R 1 to R 10 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring comprising an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl or *-L 1- N(Ar 1)( Ar 2) with the proviso that at least one of R 1 to R 10*- is L 1- N(Ar 1)( Ar 2); L 1 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 1 and Ar 2 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl.In one embodiment, R 1 to R 10, which are not -L 1- N(Ar 1)( Ar 2) may each independently be hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably hydrogen, deuterium, a substituted or unsubstituted (C6-C25)aryl, or a substituted or unsubstituted (5- to 25-membered)heteroaryl, more preferably hydrogen, deuterium, a substituted or unsubstituted (C6-C18)aryl, or a substituted or unsubstituted (5- to 18-membered)heteroaryl. For example, R 1 to R 10 may each independently be hydrogen, deuterium, a phenyl unsubstituted or substituted by a cyano, a naphthyl unsubstituted or substituted by a phenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted quinolyl, or a substituted or unsubstituted dibenzofuranyl. In one embodiment, L 1 may be a single bond or a substituted or unsubstituted (C6-C30)arylene, preferably a single bond or a substituted or unsubstituted (C6-C25)arylene, more preferably a single bond or a substituted or unsubstituted (C6-C18)arylene. For example, L may be 1 a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted p-biphenylene, a substituted or unsubstituted m-biphenylene, or a substituted or unsubstituted o-biphenylene.In one embodiment, Ar 1 and Ar 2 may each independently be a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl, more preferably a substituted or unsubstituted (C6-C18)aryl or a substituted or unsubstituted (5- to 18-membered)heteroaryl. For example, Ar 1 and Ar 2 may each independently be a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted dimethyl fluorenyl, a substituted or unsubstituted diethyl fluorenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted carbazolyl, or a substituted or unsubstituted benzonaphthothiophenyl. Wherein the substituents may be substituted, for example, by at least one of deuterium, tert-butyl, amino, phenyl, p-biphenyl, m-terphenyl, fluorenyl, triphenylsilyl, naphthyl, phenanthrenyl, pyridyl which is unsubstituted or substituted by phenyl, dibenzothiophenyl, dibenzofuranyl and carbazolyl.In one embodiment, the compound represented by Formula 1 can be more specifically exemplified by, but is not limited to, the following compounds: The compound represented by formula 1 according to the present disclosure can be synthesized by referring to synthetic methods known to those skilled in the art, for example, in Korean Patent Application Laid-Open No. 2019-0101739, U.S. Patent Application Publication No. US2017 / 0025609A1 etc. are prepared but not limited thereto.According to one embodiment, the light emitting layer comprises at least one compound represented by the following formula 2 and at least one compound represented by the following formula 3. Here, in formula 2, L 3 to L 5 each independently represent a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene; Ar 3 to Ar 5 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -N(Ar 11)( Ar 12) ; and Ar 11 and Ar 12 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; with the proviso that in formula 2, the case where all of L 3 to L 5 are a single bond and all of Ar 3 to Ar 5 are hydrogen is excluded.In one embodiment, L 3 to L 5 may each independently be a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (5- to 30-membered)heteroarylene, preferably a single bond, a substituted or unsubstituted (C6-C25)arylene or a substituted or unsubstituted (5- to 25-membered)heteroarylene, more preferably a single bond, a substituted or unsubstituted (C6-C18)arylene or a substituted or unsubstituted (5- to 18-membered)heteroarylene. For example, L 3 to L 5 may each independently be a single bond or a phenylene which is unsubstituted or substituted by phenyl or pyridyl, a substituted or unsubstituted naphthylene, a substituted or unsubstituted phenanthrenylene, a substituted or unsubstituted o-biphenylene, a substituted or unsubstituted m-biphenylene, a substituted or unsubstituted p-biphenylene, a substituted or unsubstituted pyridylene, or a substituted or unsubstituted carbazolylene.In one embodiment, Ar 3 to Ar 5 may each independently be a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -N(Ar 11)( Ar 12), preferably a substituted or unsubstituted (C1-C10)alkyl, a substituted or unsubstituted (C6-C25)aryl, a substituted or unsubstituted (5- to 25-membered)heteroaryl, a substituted or unsubstituted tri-(C6-C25)-arylsilyl or -N(Ar 11)( Ar 12), more preferably a substituted or unsubstituted (C1-C4)-alkyl, a substituted or unsubstituted (C6-C18)-aryl, a substituted or unsubstituted (5- to 18-membered)heteroaryl, a substituted or unsubstituted tri-(C6-C18)-arylsilyl or -N(Ar 11)( Ar 12). Where Ar 11 and Ar 12 may each independently be a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl, more preferably a substituted or unsubstituted (C6-C18)aryl or a substituted or unsubstituted (5- to 18-membered)heteroaryl. For example, Ar 3 to Ar 5 may each independently be a phenyl unsubstituted or substituted by deuterium or cyano, an isopropyl unsubstituted or substituted by phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted o-quaterphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted chrysenyl, fluorenyl, which is unsubstituted or substituted by at least one methyl, fluorenyl, which is unsubstituted or substituted by at least one phenyl, a substituted or unsubstituted 9,9,10,10-tetramethylphenanthrenyl, a substituted or unsubstituted triphenylsilyl, a substituted or unsubstituted pyridyl, carbazolyl, dibenzofuranyl, which is unsubstituted or substituted by deuterium, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted phenanthrolinyl, a substituted or unsubstituted dibenzoselenophenyl or a substituted or unsubstituted naphthobenzoselenophenyl. For example, wherein the substituents may be further substituted by at least one of deuterium, methyl and phenyl.For example, Ar 11 and Ar 12 may each independently be a phenyl unsubstituted or substituted by diphenylamino, a substituted or unsubstituted naphthyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted dibenzothiophenyl, or a substituted or unsubstituted dibenzofuranyl.According to one embodiment, at least one of Ar 3 to Ar 5 may be represented by any one of the following Formulas 2-1 to 2-3. It is understood that in formula 2-1, X 1 and Y 1 are each independently -N=, -NR 25-, - O- or -S-, provided that one of X 1 and Y 1- is N= and the other of X 1 and Y 1- is NR 25-, - O- or -S-; R 21 is a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; R 22 to R 25 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino or a substituted or unsubstituted (C1-C30)alkyl-(C6-C30)arylamino or may be linked to the adjacent substituents to one or more rings; a and b each independently represent an integer having a value of 1 or 2 and c represents an integer having a value of 1 to 3; and when a to c represent an integer having a value of 2 or more, each R 22 to each R 24 may be the same or different from each other; * indicates a linkage position linked to L 5 in formula 2. Here, in formula 2-2, Y represents -O-, -S- or -NR 39 ; R 39 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and R 31 to R 38 each independently represents a linking position linked to the L 5 in formula 2; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to form one or more rings. Here, in formula 2-3, T represents -O-, -S-, -CR 45 R 46, - NR 47 or -Se-; R 45 to R 47 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl or a substituted or unsubstituted (C6-C30)aryl; R 41 to R 44 are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl or -N(Ar 21)( Ar 22) or may be linked to the adjacent substituents to form one or more rings; Ar 21 and Ar 22 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; d and g each independently represent an integer having a value of 1 to 4; and e and f each independently represent an integer having a value of 1 or 2; when d to g represent an integer having a value of 2 or more, each R 41 to each R 44 may be the same or different from each other; and * indicates a linkage position linked to L 5 in formula 2.In one embodiment, the compound represented by formula 2-3 may be represented by the following formula 2-3-1 or 2-3-2.Here, in formulae 2-3-1 and 2-3-2, T, R 41 to R 44 and d to g are as defined in formula 2-3.In formula 2-1, R 21 may be a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, for example, a phenyl which is unsubstituted or substituted by deuterium, a substituted or unsubstituted naphthyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl or a substituted or unsubstituted pyridyl.In formula 2-1, R 22 to R 25 may each independently be hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably hydrogen, deuterium, a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl, more preferably hydrogen, deuterium, a substituted or unsubstituted (C6-C18)aryl or a substituted or unsubstituted (5- to 18-membered)heteroaryl. For example, R 22 to R 25 may each independently be hydrogen, deuterium, a phenyl unsubstituted or substituted by naphthyl or triphenylsilyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted p-terphenyl, fluorenyl unsubstituted or substituted by at least one methyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted benzonaphthofuranyl, or a substituted or unsubstituted benzonaphthothiophenyl.In Formula 2-2, one of R 31 to R 38 may be a linking position linked to L 5 in Formula 2.In formula 2-3, T may be -O- or -S-.In Formula 2-3, R 41 to R 44 may each independently be hydrogen or deuterium, a substituted or unsubstituted (C6-C30)aryl or -N(Ar 21)( Ar 22), for example, hydrogen, deuterium, a substituted or unsubstituted phenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted naphthyl, or a substituted or unsubstituted diphenylamine. For example, Ar 21 and Ar 22 may each independently be a substituted or unsubstituted phenyl.According to one embodiment, the compound represented by formula 2 can be more specifically exemplified by, but is not limited to, the following compounds: In the above compounds, D n, represents that n hydrogen atoms are replaced by deuterium, where n is an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms that can be replaced in each compound.The compound represented by formula 2 according to the present disclosure can be prepared by referring to synthetic methods known to those skilled in the art, for example, synthetic methods disclosed in Korean Patent Application Laid-Open Nos. 2018-0099487, 2021-0098316, and 2022-0051794, etc., but is not limited thereto. Here, in formula 3, X 1 to X 3 each independently represent N or CR 11 provided that at least one of X 1 to X 3 represents N; L 7 to L 9 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene; R 11 represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or a substituted or unsubstituted fused ring consisting of an aliphatic (C3-C30) ring and an aromatic (C6-C30) ring; Ar 7 to Ar 9 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -L 21- N(Ar 21)( Ar 22) ; L 21 is a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 21 and Ar 22 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl.In one embodiment, at least two of X 1 to X 3 may be N.In one embodiment, all of X 1 to X 3 may be N.In one embodiment, L 7 to L 9 may each independently be a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (5- to 30-membered)heteroarylene, preferably a single bond, a substituted or unsubstituted (C6-C25)arylene or a substituted or unsubstituted (5- to 25-membered)heteroarylene, more preferably a single bond, a substituted or unsubstituted (C6-C18)arylene or a substituted or unsubstituted (5- to 18-membered)heteroarylene. For example, L 7 to L 9 may each independently represent a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylphenylene, a substituted or unsubstituted phenylnaphthylene, a substituted or unsubstituted phenanthrenylene, a substituted or unsubstituted dibenzofuranylene or a substituted or unsubstituted dibenzothiophenylene, wherein the substituents may be substituted, for example, by at least one deuterium.In one embodiment, Ar 7 to Ar 9 may each independently be a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl, more preferably a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 18-membered)heteroaryl.In one embodiment, at least one of Ar 7 to Ar 9 may be a substituted or unsubstituted (5- to 30-membered)heteroaryl, preferably at least two of Ar 7 to Ar 9 may be a substituted or unsubstituted (5- to 30-membered)heteroaryl. For example, Ar 7 to Ar 9 may each independently be a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted triphenylsilyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted benzophenanthrenyl, a substituted or unsubstituted chrysenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted fluoranthenyl, or a substituted or unsubstituted benzonaphthofuranyl. Wherein the substituents may be substituted by, for example, at least one of deuterium, cyano, phenyl and naphthyl.According to one embodiment, at least one of Ar 7 to Ar 9 in Formula 3 may be represented by any one of the following Formulae 2-2, 3-1, and 3-2. Here, in formula 2-2, Y represents -O-, -S- or -NR 39 ; R 39 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and R 31 to R 38 each independently represents a linking position linked to L 7 to L 9 in formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to form one or more rings. Here, in formulae 3-1 and 3-2, R 51 to R 64 each independently represent a linking position linked to L 7 to L 9 in formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted tri-(C1-C30)-alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)-alkenylamino, a substituted or unsubstituted (C1-C30)-alkyl-(C2-C30)-alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino, a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)-heteroarylamino, a substituted or unsubstituted (C1-C30)-alkyl-(3- to 30-membered)-heteroarylamino, a substituted or unsubstituted (C2-C30)-alkenyl-(C6-C30)-arylamino, a substituted or unsubstituted (C2-C30)-alkenyl-(3- to 30-membered)-heteroarylamino or a substituted or unsubstituted (C6-C30)-aryl-(3- to 30-membered)-heteroarylamino.In Formula 2-2, one of R 31 to R 38 may be a linking position linked to L 7 to L 9 in Formula 3.In Formula 3-1, one of R 51 to R 60 may be a linking position linked to L 7 to L 9 in Formula 3.In Formula 3-2, one of R 51 to R 58 and R 61 to R 64 may be a linking position linked to L 7 to L 9 in Formula 3.According to one embodiment, the compound represented by formula 3 can be more specifically exemplified by, but is not limited to, the following compounds: In the above compounds, D n, represents that n hydrogen atoms are replaced by deuterium, where n is an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms that can be replaced in each compound.The compound represented by formula 3 according to the present disclosure can be prepared by referring to synthetic methods known to those skilled in the art, for example, synthetic methods disclosed in Korean Patent Application Laid-Open Nos. 2022-0051794, 2021-0124018, and 2021-010943, etc., but is not limited thereto.According to another embodiment, the present disclosure provides an organic electroluminescent compound represented by the following formula 1-1. In this case, it holds true that in formula 1-1 R 1 to R 10 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring composed of an aliphatic (C3-C30) ring and an aromatic (C6-C30) ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl or *-L 1- N(Ar 1)( Ar 2) with the proviso that at least one of R 1 to R 10*- is L 1- N(Ar 1)( Ar 2); L 1 is a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 1 and Ar 2 are each independently a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; with the proviso that when R 1, R 2, R 4, R 5, R is 8 or R is 9*- L is 1- N(Ar is 1)( Ar is 2) the following conditions are satisfied: (1) when R is 5 or R is 8*- L is 1- N(Ar is 1)( Ar is 2) at least one of Ar1and Ar2phenyl which is unsubstituted or substituted by deuterium; (2) When R is 1 or R is 2*- L is 1- N(Ar is 1)( Ar is 2) at least one of Ar is 1 and Ar is 2 a substituted or unsubstituted dibenzofuranyl or a substituted or unsubstituted carbazolyl; or all of Ar is 1 and Ar is 2 a substituted or unsubstituted (3- to 30-membered)heteroaryl; and (3) when R is 4 or R is 9*- L is 1- N(Ar is 1)( Ar is 2) all of Ar is 1 and Ar is 2 a substituted or unsubstituted (3- to 30-membered)heteroaryl; or at least one of Ar is 1 and Ar is 2 a substituted or unsubstituted carbazolyl.According to one embodiment, the organic electroluminescent compound represented by formula 1-1 may be more specifically exemplified by, but is not limited to, the following compounds: According to another embodiment, the present disclosure provides an organic electroluminescent compound represented by the following formula 3'. It is true here that 3' in formulaX 1 to X 3 each independently represent N or CR 11 provided that at least one of X 1 to X 3 is N; R 11 represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl or a substituted or unsubstituted fused ring comprising a (C3-C30)-aliphatic ring and a (C6-C30)-aromatic ring; L 7 to L 9 each independently represent a single bond, a substituted or unsubstituted (C6-C30)-arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 7 to Ar 9 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -L 21- N(Ar 21)( Ar 22) with the proviso that at least one of Ar 7 to Ar 9 is formula 2-2. Here, in formula 2-2, Y represents -O- or -S-; and R 31 to R 38 each independently represents a linking position linked to L 7 to L 9 in formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to form one or more rings; with the proviso that when one of L 7 to L 9 is a phenylene which is unsubstituted or substituted by deuterium or cyano, at least one of Ar 7 to Ar 9 is a binaphthyl which is unsubstituted or substituted by deuterium or cyano, and when one of L 7 to L 9 is a naphthylene which is unsubstituted or substituted by deuterium or cyano, at least one of Ar 7 to Ar 9 is a phenylnaphthyl which is unsubstituted or substituted by deuterium or cyano.In one embodiment, in formula 3', when one of L is 7 to L is 9 phenylene unsubstituted or substituted by deuterium or cyano, at least one of Ar may be 7 to Ar 9 a substituent unsubstituted or substituted by deuterium or cyano, as shown below. wherein * indicates a linking position linked by L 7 to.In one embodiment, in formula 3', when one of L 7 to L 9 is a naphthylene unsubstituted or substituted by deuterium or cyano, at least one of Ar 7 to Ar 9 may be a substituent unsubstituted or substituted by deuterium or cyano as shown below. wherein * indicates a linkage position linked to L 7 to L 9.In one embodiment, the compound represented by formula 3' may be more specifically exemplified by, but is not limited to, the following compounds: In the above compounds, D n, represents that n hydrogen atoms are replaced by deuterium, where n is an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms that can be replaced in each compound.Described below is an organic electroluminescent device comprising the above-mentioned compound represented by formulae 1 to 3, 1-1 and 3'.An organic electroluminescent device according to an embodiment includes a first electrode and a second electrode opposing each other on a substrate, at least one light emitting layer disposed between the first electrode and the second electrode, and at least one electron blocking layer disposed between the first electrode and the light emitting layer.According to an embodiment, the first electrode may be an anode and the second electrode may be a cathode. In this case, the first electrode and the second electrode can each be formed as a transmissive conductive material, transflective conductive material or reflective conductive material. The organic electroluminescent device may be of the top emission type, bottom emission type or both-side emission type depending on the type of material from which the first electrode and the second electrode are formed.The electron blocking layer is located between the first electrode and the light emitting layer, preferably between the hole transport layer and the light emitting layer, and more preferably the electron blocking layer is in contact with the light emitting layer. The electron blocking layer may improve the efficiency of the organic electroluminescent device by suppressing the transfer of electrons injected from the cathode to the anode without recombination in the light emitting layer, according to an example. In addition, it can prevent emission leakage by blocking the overflow of electrons from the light emitting layer and retaining excitons in the light emitting layer.According to one embodiment, the electron blocking layer contains a compound represented by Formula 1, and the light emitting layer may contain a compound represented by Formula 2 as a first host compound and a compound represented by Formula 3 as a second host compound. Here, the weight ratio of the first host compound to the second host compound in the light-emitting layer may be in the range of about 1:99 to about 99:1, preferably about 10:90 to about 90:10, more preferably about 30:70 to about 70:30, more preferably about 40:60 to about 60:40, and even more preferably about 50:50.According to one embodiment, the organic electroluminescent device comprises at least one compound among compounds H1-1 to H1-161 as an electron blocking layer material, and at least one compound among compounds H3-1 to H3-743 and H4-1 to H4-484, and at least one compound among compounds H5-1 to H5-402 as a host material of the light emitting layer, wherein these host materials may be contained in the same light emitting layer or may be contained in different light emitting layers, respectively.According to one embodiment, the present invention provides an organic electroluminescent device comprising an organic electroluminescent compound represented by Formula 1-1.According to one embodiment, the present invention provides an organic electroluminescent device comprising an organic electroluminescent compound represented by formula 3'.An organic electroluminescent device according to an embodiment includes, in addition to the electron blocking layer and the light emitting layer, a hole injection layer, a hole transport layer, a hole auxiliary layer, an electron transport layer, and an electron injection layer as an organic layer disposed between a first electrode and a second electrode, and may further include one or more layers selected from an auxiliary light emitting layer, an intermediate layer, a hole blocking layer, and an electron buffer layer. The organic layer may further include an amine-based compound and / or an azine-based compound in addition to the light-emitting material of the present disclosure. Specifically, the hole injection layer, the hole transport layer, the hole auxiliary layer, the light emitting layer, the light emitting auxiliary layer, or the electron blocking layer may include an amine-based compound, for example, an arylamine-based compound, a styrylamine-based compound, or the like, as a hole injection material, a hole transport material, a hole auxiliary material, a light emitting material, an auxiliary light emitting material, and an electron blocking material. In addition, the electron transport layer, electron injection layer, electron buffer layer, and hole blocking layer may contain an azine-based compound as an electron transport material, an electron injection material, an electron buffer material, and a hole blocking material. In addition, the organic layer may further include at least one metal selected from the group consisting of Group 1 metals, Group 2 metals, 4th period transition metals, 5th period transition metals, lanthanides, and organic metals of the d-transition elements of the periodic table, or at least one complex compound including such a metal.Between the anode and the light emitting layer, a hole injection layer, a hole transport layer, an electron blocking layer, or a combination thereof may be used. The hole-injection layer may be formed in a multi-layered manner to lower the hole-injection barrier (or hole-injection voltage) from the anode to the hole-transport layer or electron-blocking layer, and two compounds may be used simultaneously in each of the plurality of layers. The hole injection layer can also be doped as a p-dopant.The hole transport layer or the electron blocking layer can be formed in multilayer form according to one embodiment, wherein a plurality of compounds can be used in each layer.The hole auxiliary layer is located between the hole transport layer and the electron blocking layer (or the light emitting layer) and may have the effect of facilitating or blocking the hole transport speed (or hole injection speed), thereby controlling charge balance to effectively lower the driving voltage of the organic electroluminescent device. When the organic electroluminescent device comprises two or more hole transport layers, the hole transport layer additionally contained may also be used as a hole auxiliary layer or an electron blocking layer.Between the light emitting layer and the cathode, an electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof may be used. The electron buffer layer may be formed in a multi-layered manner to control electron injection and improve the interfacial properties between the light emitting layer and the electron injection layer, and two compounds may be used simultaneously in each of the plurality of layers. The hole blocking layer may be disposed between the electron transport layer (or electron injection layer) and the light emitting layer and blocks arrival of holes at the cathode, thereby improving the probability of recombination of electrons and holes in the light emitting layer. The hole blocking layer or the electron transport layer can likewise be formed in a multilayer manner, it being possible for a plurality of compounds to be used in each layer. In addition, the electron injection layer may be doped as an n-type dopant.The organic electroluminescent device of the present disclosure may further include the auxiliary light emitting layer disposed between the anode and the light emitting layer or between the cathode and the light emitting layer. When the auxiliary light-emitting layer is disposed between the anode and the light-emitting layer, it can be used for promoting hole injection and / or hole transport or for preventing overflow of electrodes. When the auxiliary light-emitting layer is disposed between the cathode and the light-emitting layer, it can be used for promoting electron injection and / or electron transport or for preventing overflow of holes. The auxiliary light emitting layer, the hole auxiliary layer, or the electron blocking layer may improve the efficiency and / or the life of the organic electroluminescent device.The organic electroluminescent material according to an embodiment may be used as a light emitting material for a white organic light emitting device. The white organic light emitting device has various proposed structures such as a side-by-side parallel arrangement method, a stacked arrangement method, a color conversion material (CCM) method, etc., depending on the arrangement of red (R), green (G), yellowish green (YG), or blue (B) light emitting units. In addition, the compound or the organic electroluminescent material according to an embodiment may also be applied to the organic electroluminescent device including a quantum dot (QD).In the organic electroluminescent device of the present disclosure, preferably, at least one layer (hereinafter, "a surface layer") selected from a chalcogenide layer, a halogenated metal layer, and a metal oxide layer may be disposed on one or more inner surfaces of one or both electrodes of a pair of electrodes. More specifically, a layer of chalcogenide (including oxides) of silicon and aluminum is preferably disposed on an anode surface of a layer of electroluminescent medium, and a layer of halogenated metal or a layer of metal oxide is preferably disposed on a cathode surface of a layer of electroluminescent medium. The surface layer can maintain the operating stability for the organic electroluminescent device. Preferably, the chalcogenide includes SiO X(1 ≤X≤2), AIO X(1 ≤X≤1.5), SiON, SiAION, etc., the halogenated metal includes LiF, MgF 2, CaF 2, a rare earth metal fluoride, etc., and the metal oxide includes Cs 2 O, Li 2 O, MgO, SrO, BaO, CaO, etc.The organic electroluminescent device may be an organic electroluminescent device having a tandem structure according to an embodiment of the present disclosure. In the case of a tandem organic electroluminescent device, according to an embodiment, a single light emitting unit (light emitting unit) may be formed in a structure in which two or more units are connected by a charge generation layer. The organic electroluminescent device may include a plurality of two or more light emitting units, for example, a plurality of three or more light emitting units having a first electrode and a second electrode opposing each other on a substrate, and a light emitting layer disposed between the first electrode and the second electrode and emitting light in a specific wavelength range. According to an embodiment, the organic electroluminescent device may include a plurality of light emitting units, and each of the light emitting units may include a hole transport zone, a light emitting layer, and an electron transport zone, and the hole transport band may include a hole injection layer and a hole transport layer, and the electron transport zone may include an electron transport layer and an electron injection layer. According to an embodiment, three or more light emitting layers may be included in the light emitting unit. A plurality of light emitting units may emit the same color or different colors. In addition, a light emitting unit may include one or more light emitting layers, and the plurality of light emitting layers may be light emitting layers of the same color or different colors. This may include one or more charge generation layers located between each light emitting unit. The charge generation layer refers to the layer in which holes and electrons are generated upon application of a voltage. In the presence of three or more light emitting units, a charge generation layer may be provided between each light emitting unit. Here, the plurality of charge generation layers may be the same or different from each other. By disposing the charge generation layer between light emitting units, current efficiency in each light emitting unit is increased, and charges can be easily distributed. In particular, the charge generation layer is provided between two adjacent stacks and may serve to drive a tandem organic electroluminescent device having only a pair of anode and cathode without a separate internal electrode between the stacks.The charge generation layer may be composed of an n-type charge generation layer and a p-type charge generation layer, and the n-type charge generation layer may be doped with an alkali metal, an alkaline earth metal, or a compound of an alkali metal and an alkaline earth metal. The alkali metal may include one selected from the group consisting of Li, Na, K, Rb, Cs, Fr, Yb, and combinations thereof, and the alkaline earth metal may include one selected from the group consisting of Be, Mg, Ca, Sr, Ba, Ra, and combinations thereof. The p-type charge generation layer may be made of a metal or an organic material doped with a p-type dopant. For example, the metal may be made of one or two or more alloys selected from the group consisting of Al, Cu, Fe, Pb, Zn, Au, Pt, W, In, Mo, Ni, and Ti. In addition, commonly used materials may be used as a p-type dopant and host materials used in the p-type doped organic material.In addition, in the organic electroluminescent device of the present disclosure, a mixed region of an electron transport compound and a reductive dopant or a mixed region of a hole transport compound and an oxidative dopant may be disposed on at least one surface of a pair of electrodes. In this case, the electron transport compound is reduced to an anion, thereby making it easier to inject and transport electrons from the mixed region into an electroluminescent medium. Further, the hole transport compound is oxidized to a cation, thereby making it easier to inject and transport holes from the mixed region into the electroluminescent medium. Preferably, the oxidative dopant includes various Lewis acid and acceptor compounds, and the reductive dopant includes alkali metals, alkali metal compounds, alkaline earth metals, rare earth metals, and mixtures thereof. In addition, a reductive dopant layer may be used as the charge generating layer to produce an organic electroluminescent device having two or more light emitting layers and emitting white light.An organic electroluminescent device according to an embodiment may further comprise at least one dopant in the light emitting layer.The dopant contained in the organic electroluminescent device of the present disclosure may be at least one phosphorescent or fluorescent dopant, preferably a phosphorescent dopant. The phosphorescent dopant material applied to the organic electroluminescent device of the present disclosure is not particularly limited, but may preferably be one or more metalated complex compounds of one or more metal atoms selected from iridium (Ir), osmium (Os), copper (Cu), and platinum (Pt), more preferably one or more ortho-metalated complex compounds of one or more metal atoms selected from iridium (Ir), osmium (Os), copper (Cu), and platinum (Pt), and even more preferably one or more ortho-metalated iridium complex compounds.The dopant contained in the organic electroluminescent device of the present disclosure may use the compound represented by the following formula 101, but is not limited thereto. In formula 101, L is selected from one of the following structures 1 to 3: where, in structures 1 to 3, R 100 to R 103 each independently represent hydrogen, deuterium, a halogen, (C1-C30)alkyl which is unsubstituted or substituted by deuterium and / or halogen, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a cyano, a substituted or unsubstituted (3- to 30-membered)heteroaryl or a substituted or unsubstituted (C1-C30)alkoxy or, with the substituents adjacent to one or more rings, for example to one or more rings with a pyridine, for example a substituted or unsubstituted quinoline, a substituted or unsubstituted benzofuropyridine, a substituted or unsubstituted benzothienopyridine, a substituted or unsubstituted indenopyridine, a substituted or unsubstituted benzofuroquinoline, a substituted or unsubstituted benzothienoquinoline or a substituted or unsubstituted indenoquinoline; R 104 to R 107 each independently represent hydrogen, deuterium, a halogen, (C1-C30)alkyl which is unsubstituted or substituted by deuterium and / or halogen, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a cyano or a substituted or unsubstituted (C1-C30)alkoxy or are substituted or unsubstituted (C1-C30)alkoxy by one or more substituents adjacent to one or more substituted or unsubstituted rings, for example, one or more substituted or unsubstituted rings may be linked to a benzene, for example a substituted or unsubstituted naphthalene, a substituted or unsubstituted fluorene, a substituted or unsubstituted dibenzothiophene, a substituted or unsubstituted dibenzofuran, a substituted or unsubstituted indenopyridine, a substituted or unsubstituted benzofuropyridine or a substituted or unsubstituted benzothienopyridine; R 201 to R 220 are each independently hydrogen, deuterium, a halogen, (C1-C30)alkyl which is unsubstituted or substituted by deuterium and / or halogen, a substituted or unsubstituted (C3-C30)cycloalkyl or a substituted or unsubstituted (C6-C30)aryl or may be linked to one or more adjacent substituents to one or more substituted or unsubstituted rings; and s is an integer from 1 to 3.Specifically, the specific examples of the dopant compound include, but are not limited to, the following: The organic electroluminescent device of the present disclosure may be produced by forming a first electrode or a second electrode on a substrate and then forming an organic layer using a dry deposition method such as vacuum deposition, sputtering, plasma or ion plating, or a wet deposition method such as inkjet printing, nozzle printing, slot coating, spin coating, dip coating or flood coating and then forming a second electrode or a first electrode thereon. When using a wet film forming method, a thin film can be formed by dissolving or diffusing materials forming each layer in a suitable solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc. The solvent may be any solvent in which the materials constituting each layer can be dissolved or diffused and in which there are no problems in film formability.In forming a layer by the organic electroluminescent material, the layer according to an embodiment may be formed by the above-listed methods, and may often be formed by co-deposition or mixture deposition. Co-deposition is a mixed deposition method in which two or more materials are placed in respective individual crucible sources and a current is simultaneously applied to both cells to evaporate the materials; mixed deposition is a mixed deposition method in which two or more materials are mixed in a crucible source before deposition and then a current is applied to a cell to evaporate the materials.According to an embodiment, the present disclosure may provide a display device including a compound represented by Formulae 1 to 3 as an organic electroluminescent material. In addition, the organic electroluminescent device of the present disclosure may be used for manufacturing display devices such as smartphones, tablets, notebooks, PCs, televisions, or display devices for cars, or lighting devices such as exterior or interior lighting.[Example 1] Synthesis of Compound H1-149Compound 1-1 (6.6 g, 25.91 mmol), Compound 1-2 (10 g, 23.56 mmol), Tris(dibenzylidenaceton)dipalladium (0) (Pd 2( dba) 3) (1,07 g, 1.178 mmol), sodium tert-butoxide (NaOt-Bu) (3.4 g, 35.34 mmol), and s-phos (0.96 g, 2.356 mmol) were added to 120 ml of o-xylene, and then stirred at 120° C. for 2 hours. After completion of the reaction, the mixture was cooled to room temperature, filtered through celite, and distilled under reduced pressure. Next, it was separated by column chromatography to give Compound H1-149 (7.1 g, yield: 50%). <row><cell>H1-149< / cell><cell>600,7< / cell><cell>165.3°C< / cell>< / row><head xml:id="_ce8b230858">[Example 2] Synthesis of Compound H1-146< / head><p xml:id="_ce8b230859"><figure xml:id="_ce8b230860" n="0001" type="chem" style="portrait" facs="0451"><graphic height="54" width="143" source="DE102024134697A1_0451.tif" url=" / 99599253-0016-45f0-aac4-858e55d580db_DE102024134697A1_0451" / ><media mimeType="image / tif" url="DE102024134697A1_0451.tif" / >< / figure><p xml:id="_ce8b230861" n="0105">Compound 2-1 (2.4 g, 8.482 mmol), Compound 1-2 (3 g, 7.068 mmol), Pd <hi rend="subscript">2< / hi>( dba) <hi rend="subscript">3< / hi>(0,32 g, 0.353 mmol), NaOt-Bu (1 g, 10.60 mmol) and s-phos (0.29 g, 0.706 mmol) were added to 35 ml of o-xylene and then stirred at 120° C. for 2 hours. After completion of the reaction, the mixture was cooled to room temperature, filtered through celite, and distilled under reduced pressure. Next, it was separated by column chromatography to give Compound H1-146 (4.2 g, yield: 87%).<title desc="title" / ><row><cell>H1-146< / cell><cell>676,8< / cell><cell>268.8°C< / cell>< / row><head xml:id="_ce8b230876">[Example 3] Synthesis of Compound H1-161< / head><p xml:id="_ce8b230877"><figure xml:id="_ce8b230878" n="0001" type="chem" style="portrait" facs="0452"><graphic height="41" width="124" source="DE102024134697A1_0452.tif" url=" / 99599253-0016-45f0-aac4-858e55d580db_DE102024134697A1_0452" / ><media mimeType="image / tif" url="DE102024134697A1_0452.tif" / >< / figure><p xml:id="_ce8b230879" n="0106">Compound 3-1 (10.0 g, 30.0 mmol), Compound 3-2 (10.53 g, 31.5 mmol), Pd <hi rend="subscript">2< / hi>( dba) <hi rend="subscript">3< / hi>(1,4 g, 1.5 mmol), S-phos (1.2 g, 3.0 mmol) and NaOtBu (4.3 g, 45.0 mmol) were added to 150 ml of o-xylene, and then stirred at 120° C. under reflux for 1 hour. After completion of the reaction, the mixture was cooled to room temperature, after which the layers were separated (EA / H <hi rend="subscript">2< / hi> O). Next, it was filtered with celite and then silica to produce a solid. Thereafter, it was filtered to give Compound H1-161 (2.4 g, yield: 14%).<title desc="title" / ><row><cell>H1-161< / cell><cell>586,7< / cell><cell>208°C< / cell>< / row><head xml:id="_ce8b230895">[Example 4] Synthesis of Compound H1-147< / head><p xml:id="_ce8b230896"><figure xml:id="_ce8b230897" n="0001" type="chem" style="portrait" facs="0453"><graphic height="39" width="146" source="DE102024134697A1_0453.tif" url=" / 99599253-0016-45f0-aac4-858e55d580db_DE102024134697A1_0453" / ><media mimeType="image / tif" url="DE102024134697A1_0453.tif" / >< / figure><p xml:id="_ce8b230898" n="0107">Compound 4-1 (3.3 g, 11.4 mol), Compound 1-2 (4.65 g, 11.4 mmol), NaOtBu (1.64 g, 17.1 mmol), S-Phos (374 mg, 0.912 mmol), Pd <hi rend="subscript">2< / hi>( dba) <hi rend="subscript">3< / hi>(522 mg, 0.57 mmol), and 57 ml of xylene were placed in a flask, and then dissolved, and stirred under reflux at 160° C. for 30 minutes. After completion of the reaction, the organic layer is extracted with ethyl acetate and the residual moisture is removed with magnesium sulfate. The residue was dried and separated by column chromatography to give Compound H1-147 (4 g, yield: 51%).<title desc="title" / ><row><cell>H1-147< / cell><cell>676,82< / cell><cell>275.3°C< / cell>< / row><p xml:id="_ce8b230913" n="0108">Hereinafter, the manufacturing method for an organic electroluminescent device comprising the compound according to the present disclosure and an organic electroluminescent material comprising the same and the device characteristics thereof will be explained in order to understand the present disclosure in detail.<head xml:id="_ce8b230914">[Device Example 1] Production of an OLED comprising the compound according to the present disclosure< / head><p xml:id="_ce8b230915" n="0109">An OLED according to the present disclosure was produced. First, a transparent electrode indium tin oxide (ITO) thin film (10 Ω / sq) on a glass substrate for an OLED (GEOMATEC CO., LTD., Japan) was subjected to ultrasonic washing with acetone and isopropyl alcohol in sequence, and thereafter, stored in isopropyl alcohol, and then used. Thereafter, the ITO substrate was mounted on a substrate holder of a vacuum vapor deposition apparatus. Then, compound HI-1 was introduced into one cell of the vacuum vapor deposition apparatus, and compound HT-1 was introduced into another cell. The two materials were evaporated at different rates, and compound HI-1 was deposited in a doping amount of 3 wt% based on the total amount of compounds HI-1 and HT-1 to form a hole injection layer having a thickness of 10 nm. Then, compound HT-1 was deposited on the hole injection layer to form a first hole transport layer having a thickness of 80 nm. Then, compound HT2-1was introduced into another cell of the vacuum vapor deposition apparatus and evaporated by applying an electric current to the cell, thereby forming a second hole transport layer having a thickness of 55 nm on the first hole transport layer. Then, compound H1-42 was introduced as an electron blocking layer material, and an electron blocking layer having a thickness of 5 nm was deposited on the second hole transport layer. The first host compound and the second host compound described in Table 1 below were introduced as hosts into the two cells of the vacuum vapor deposition apparatus, and compound D-39 was introduced as a dopant into another cell, after which the two host materials were evaporated at a rate of 1:1, and the dopant material was simultaneously evaporated at a different rate and deposited at a dopant amount of 3% by weight based on the total amount of the hosts and the dopant to form a light emitting layer having a thickness of 40 nm on the electron blocking layer. Next, compound ETL-1 and compound EIL-1 were evaporated as electron transport materials in a weight ratio of 50:50 to deposit an electron transport layer having a thickness of 35 nm on the light emitting layer. Next, compound EIL-1 for an electron injection layer was deposited on the electron transport layer to a thickness of 2 nm, and then an Al cathode was deposited on the electron injection layer to a thickness of 80 nm using another vacuum vapor deposition apparatus. Thus, an OLED was produced. Each compound used for all of the materials was purified by vacuum sublimation at 10 <hi rend="superscript">-6< / hi> torr.<head xml:id="_ce8b230917">[Device Examples 2 to 22] Production of OLEDs Comprising the Compound according to the Present Disclosure< / head><p xml:id="_ce8b230918" n="0110">OLEDs were produced in the same manner as Device Example 1 except that the compounds shown in Tables 1 to 4 below were used as the material for the second hole transport layer and the host material of the light emitting layer.<head xml:id="_ce8b230919">[Comparative Examples 1 to 22] Production of OLEDs without electron blocking layer< / head><p xml:id="_ce8b230920" n="0111">OLEDs were fabricated in the same manner as Device Example 1 except that the compounds shown in Tables 1 to 4 below were used as the material for the second hole transport layer and the host material of the light emitting layer, no electron blocking layer was contained, and a second hole transport layer was deposited to a thickness of 60 nm.<p xml:id="_ce8b230921" n="0112">The driving voltage, the luminous efficiency, and the light emission color at a luminance of 5000 nit, and the time required to reduce the luminance from 100% to 95% at a luminance of 10,000 nit (lifetime: T95) of the OLED devices of Device Examples 1 to 22 and Comparative Examples 1 to 22 manufactured as described above were measured, and the results thereof are shown in Tables 1 to 4 below. Table 1<title desc="title">Table 1Device Example 1HT2-1H 1-42H4-157H5-883,934,6Red Red395Comparative Example 1HT2-1-H4-157H5-883,734,2Red Red288Device Example 2HT2-1H 1-42H4-191H5-1313,735,0Red Red353Comparative Example 2HT2-1-H4-191H5-1313,633,9Red Red178Device Example 3HT2-1H 1-42H4-247H5-1043,735,1Red Red162Comparative Example 3HT2-1-H4-247H5-1043,732,6Red Red107Device Example 4HT2-1H 1-42H4-246H5-513,634,9Red Red379Comparative Example 4HT2-1-H4-246H5-513,533,4Red Red279Device Example 5HT2-1H 1-42H4-160H5-863,735,8Red Red387Comparative Example 5HT2-1-H4-160H5-863,635,1Red Red314Table 2Table 2Device Example 6HT2-2H1-42H4-246H5-513,733,0Red Red348Comparative Example 6HT2-2-H4-246H5-513,532,7Red Red267Device Example 7HT2-2H1-42H4-160H5-863,733,8Red Red346Comparative Example 7HT2-2-H4-160H5-863,633,6Red Red308Device Example 8HT2-2H1-42H3-89H5-863,933,9Red Red318Comparative Example 8HT2-2-H3-89H5-863,833,4Red Red261Device Example 9HT2-2H1-42H4-286H5-1313,633,9Red Red338Comparative Example 9HT2-2-H4-286H5-1313,532,6Red Red256Device Example 10HT2-2H1-42H4-283H5-1313,833,4Red Red270Comparative Example 10HT2-2-H4-283H5-1313,732,1Red Red169Device Example 11HT2-2H1-42H4-246H5-1183,634,2Red Red433Comparative Example 11HT2-2-H4-246H5-1183,532,7Red Red314Device Example 12HT2-2H1-42H4-246H5-523,634,5Red Red256Comparative Example 12HT2-2-H4-246H5-523,432,8Red Red142Device Example 13HT2-2H 1-42H4-246H5-1583,733,6Red Red325Comparative Example 13HT2-2-H4-246H5-1583,633,1Red Red278Table 3Table 3Device Example 14HT2-3H 1-42H3-89H5-864,030,7Red Red428Comparative Example 14HT2-3-H3-89H5-863,830,6Red Red392Device Example 15HT2-3H 1-42H4-286H5-1313,730,9Red Red415Comparative Example 15HT2-3-H4-286H5-1313,630,2Red Red289Device Example 16HT2-3H 1-42H4-283H5-1313,929,7Red Red275Comparative Example 16HT2-3-H4-283H5-1313,830,0Red Red168Device Example 17HT2-3H 1-42H4-246H5-1183,731,1Red Red428Comparative Example 17HT2-3-H4-246H5-1183,629,7Red Red289Device Example 18HT2-3H 1-42H4-246H5-523,631,0Red Red275Comparative Example 18HT2-3-H4-246H5-523,529,6Red Red125Device Example 19HT2-3H 1-42H4-246H5-1313,630,7Red Red363Comparative Example 19HT2-3-H4-246H5-1313,529,6Red Red224Table 4Table 4Device-Example 20HT2-4H 1-42H4-246H5-1183,733,5Red Red512Comparative Example 20HT2-4-H4-246H5-1183,631,7Red Red360Device Example 21HT2-4H 1-42H4-246H5-523,633,3Red Red331Comparative Example 21HT2-4-H4-246H5-523,531,4Red Red86Device - Example 22HT2-4H 1-42H4-246H5-513,633,1Red Red445Comparative Example 22HT2-4-H4-246H5-513,531,4Red Red254From the above Tables 1 to 4, it can be confirmed that organic electroluminescent devices (Device Examples 1 to 22) containing a compound according to the present disclosure as an electron blocking layer material and containing a specific combination of compounds according to the present disclosure as a host material are a luminous efficiency equal to or greater than that of organic electroluminescent devices (Comparative Examples 1 to 22) containing no electron blocking layer, and particularly exhibit significantly improved durability properties.[Device Examples 23 to 28] Production of OLEDs Comprising the Compound according to the Present DisclosureOLEDs were fabricated in the same manner as Device Example 1 except that the compounds shown in Table 5 below were used as the material for the second hole transport layer and the host material of the light emitting layer, no electron blocking layer was contained, and the second hole transport layer was deposited to a thickness of 60 nm.[Comparative Example 23] Production of an OLED without an electron blocking layerAn OLED was produced in the same manner as Device Example 1 except that the compounds shown in Table 5 below were used as the material for the second hole transport layer and the host material of the light emitting layer, no electron blocking layer was contained, and the second hole transport layer was deposited to a thickness of 60 nm; in addition, the second host compound described in Table 5 was introduced into a cell with the vacuum vapor deposition apparatus, and compound D-39 was introduced as a dopant into another cell, and then deposited to a dopant amount of 3 wt % based on the total amount of the hosts and the dopant to form a light emitting layer having a thickness of 40 nm on the second hole transport layer.The driving voltage, the luminous efficiency, and the light emission color at a luminance of 5000 nit, and the time required to reduce the luminance from 100% to 95% at a luminance of 10,000 nit (lifetime: T95) of the OLED devices of Device Examples 23 to 28 and Comparative Example 23 manufactured as described above were measured, and the results thereof are shown in Table 5 below. Table 5 Table 5Device Example 23HT2-5H1-132H5-863,832,1Red Red350Device Example 24HT2-5H1-135H5-863,732,7Red Red414Device Example 25HT2-5H1-147H5-863,631,7Red Red353Device Example 26HT2-2H1-161H5-863,733,0Red Red789Device Example 27HT2-2H1-146H5-863,732,9Red Red459Device Example 28HT2-2H1-149H5-863,732,2Red Red170Comparative Example 23HT2-5-H5-864,526,6Red Red25From Table 5 above, it is apparent that organic electroluminescent devices (Device Examples 23 to 28) containing a specific combination of compounds according to the present disclosure as a material for the light emitting layer exhibit a lower driving voltage and a higher luminous efficiency, and particularly exhibit significantly improved durability properties as compared with Comparative Example 23.The compounds used in Device Examples and Comparative Examples are shown in detail in Table 6 below. Table 6 Table 6Hole Injection Layer / First Hole Transport LayerSecond Hole Transport LayerElectron Blocking LayerLight-emitting LayerElectron-transport layer / electron-injection layerReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedKR 10-2306966

[0003] KR 2019-0101739

[0031] US2017 / 0025609 A1

[0031] KR 2018-0099487

[0050] KR 2021-0098316

[0050] KR 2022-0051794 [0050, 0065]KR 2021-0124018

[0065] KR 2021-010943

[0065]

Claims

An organic electroluminescent device comprising: a first electrode; a second electrode; a light emitting layer between the first electrode and the second electrode; and at least one electron blocking layer between the first electrode and the light emitting layer, wherein the electron blocking layer comprises a compound represented by the following formula 1, and the light emitting layer comprises at least two kinds of compounds: wherein R 1 to R 10 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30) ring and an aromatic (C6-C30) ring, a substituted or unsubstituted (C6-C30) aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted tri-(C1-C30) alkylsilyl, a substituted or unsubstituted di-(C1-C30) alkyl-(C6-C30) arylsilyl, a substituted or unsubstituted (C1-C30) alkyldi-(C6-C30) arylsilyl, a substituted or unsubstituted tri-(C6-C30) arylsilyl or *-L 1- N(Ar 1)( Ar 2) ; with the proviso that at least one of R is 1 to R is 10*- L is 1- N(Ar is 1)( Ar is 2) ; L is 1 a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 1 and Ar 2 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl.The organic electroluminescent device of claim 1, wherein the organic electroluminescent device comprises at least one hole assist layer between the first electrode and the electron blocking layer.The organic electroluminescent device according to claim 1, wherein the light emitting layer comprises at least one compound represented by the following formula 2 and at least one compound represented by the following formula 3: wherein L 3 to L 5 each independently represent a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene; Ar 3 to Ar 5 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -N(Ar 11)( Ar 12) ; and Ar 11 and Ar 12 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; A compound having the proviso that in formula 2, the case where all of L 3 to L 5 are a single bond and all of Ar 3 to Ar 5 are hydrogen is excluded, wherein X 1 to X 3 are each independently N or CR 11 ; with the proviso that at least one of X 1 to X 3 is N; R NER34 is hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or a substituted or unsubstituted fused ring comprising an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring; L 7 to L 9 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; Ar 7 to Ar 9 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3-30 membered) heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or -L 21- N(Ar 21)( Ar 22) ; L 21 is a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3-30 membered)heteroarylene; and Ar 21 and Ar 22 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl.The organic electroluminescent device of claim 3, wherein at least one of Ar 3 to Ar 5 in formula 2 is represented by any one of the following formulae 2-1 to 2-3: wherein X 1 and Y 1 are each independently -N=, -NR 25-, - O- or -S-, provided that one of X 1 and Y 1- is N= and the other of X 1 and Y 1- is NR25-, -O- or -S-; R 21 represents a linking position linked to L 3 to L 5 in Formula 2, or a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3-30 membered)heteroaryl; R 22 to R 25 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3-30 membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)-alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino, or may be linked to the adjacent substituents to one or more rings; a and b each independently represent an integer having a value of 1 or 2, and c represents an integer having a value of 1 to 3; and when a to c represent an integer having a value of 2 or more, each R 22 until each R 24 may be the same or different from each other; * indicates a linking position linked to L 3 to L 5 in formula 2; wherein Y represents -O-, -S- or -NR 39 ; R 39 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3-30 membered)heteroaryl; and R 31 to R 38 each independently represent a linking position linked to L 3 to L 5 in formula 2; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)-alkyl-(C6-C30)-arylsilyl, a substituted or unsubstituted (C1-C30)-alkyldi-(C6-C30)-arylsilyl, a substituted or unsubstituted tri-(C6-C30)-arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to form one or more rings; wherein T is -O-, -S-, -CR 45 R 46, - NR 47 or -Se-; R 45 to R 47 are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl or a substituted or unsubstituted (C6-C30)aryl; R 41 to R 44 are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl or -N(Ar 21)( Ar 22) or may be linked to the adjacent substituents to form one or more rings; Ar 21 and Ar 22 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; d and g each independently represent an integer having a value of 1 to 4; and e and f each independently represent an integer having a value of 1 or 2; when d to g represent an integer having a value of 2 or more, each R 41 to each R 44 may be the same or different from each other; and * indicates a linkage position linked to L 3 to L 5 in formula 2.The organic electroluminescent device according to claim 3, wherein at least one of Ar 7 to Ar 9 in formula 3 is represented by any one of the following formulae 2-2, 3-1, and 3-2: wherein Y represents -O-, -S-, or -NR 39 ; R 39 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3-30 membered)heteroaryl; and R 31 to R 38 each independently represents a linking position linked to L 7 to L 9 in formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to one or more rings; wherein R 51 to R 64 each independently represent a linkage position linked to L 7 to L 9 in formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)-alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30) ring and an aromatic (C6-C30) ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)-alkenylamino, a substituted or unsubstituted (C1-C30)-alkyl-(C2-C30)-alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino, a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)-heteroarylamino, a substituted or unsubstituted (C1-C30)-alkyl-(3- to 30-membered)-heteroarylamino, a substituted or unsubstituted (C2-C30)-alkenyl-(C6-C30)-arylamino, a substituted or unsubstituted (C2-C30)alkenyl-(3- to 30-membered)heteroarylamino or a substituted or unsubstituted (C6-C30)aryl-(3- to 30-membered)heteroarylamino.The organic electroluminescent device according to claim 1, wherein the compound represented by formula 1 is selected from the following compounds: The organic electroluminescent device according to claim 3, wherein the compound represented by formula 2 is selected from the following compounds: wherein in the above compounds D n means that n hydrogen atoms are replaced by deuterium, n being an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms which can be replaced in each compound.The organic electroluminescent device according to claim 3, wherein the compound represented by formula 3 is selected from the following compounds: wherein in the above compounds D n means that n hydrogen atoms are replaced by deuterium, n being an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms which can be replaced in each compound.An organic electroluminescent compound represented by the following formula 1-1: wherein R 1 to R 10 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of a (C3-C30)aliphatic ring and a (C6-C30)aromatic ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or *-L 1- N(Ar 1)( Ar 2) with the proviso that at least one of R is 1 to R is 10*- L is 1- N(Ar 1)( Ar is 2); L 1 is a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 1 and Ar 2 are each independently a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; with the proviso that when R 1, R 2, R 4, R 5, R is 8 or R is 9*- L is 1- N(Ar is 1)( Ar is 2) the following conditions are satisfied: (1) when R is 5 or R is 8*- L is 1- N(Ar is 1)( Ar is 2) at least one of Ar1and Ar2phenyl which is unsubstituted or substituted by deuterium; (2) When R is 1 or R is 2*- L is 1- N(Ar is 1)( Ar is 2) at least one of Ar is 1 and Ar is 2 a substituted or unsubstituted dibenzofuranyl or a substituted or unsubstituted carbazolyl; or all of Ar is 1 and Ar is 2 a substituted or unsubstituted (3- to 30-membered)heteroaryl; and (3) when R is 4 or R is 9*- L is 1- N(Ar is 1)( Ar is 2) all of Ar is 1 and Ar is 2 a substituted or unsubstituted (3- to 30-membered)heteroaryl; or at least one of Ar is 1 and Ar is 2 a substituted or unsubstituted carbazolyl.The organic electroluminescent compound according to claim 9, wherein the organic electroluminescent compound represented by formula 1-1 is selected from the following compounds: An organic electroluminescent device comprising an organic electroluminescent compound according to claim 9.An organic electroluminescent compound represented by the following formula 3': wherein X 1 to X 3 are each independently N or CR 11 provided that at least one of X 1 to X 3 is N; R 11 is hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl or a substituted or unsubstituted fused ring of a (C3-C30)aliphatic ring and a (C6-C30)aromatic ring; L 7 to L 9 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and Ar 7 to Ar 9 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted fused ring of an aliphatic (C3-C30)ring and an aromatic (C6-C30)ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, or -L 21- N(Ar 21)( Ar 22) provided that at least one of Ar is 7 to Ar 9 Formula 2-2; wherein Y is -O- or -S-; and R 31 to R 38 each independently represent a linkage position linked to L 7 to L 9 in Formula 3; or hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri-(C1-C30)alkylsilyl, a substituted or unsubstituted di-(C1-C30)alkyl-(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi-(C6-C30)arylsilyl, a substituted or unsubstituted tri-(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)-alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)-arylamino or a substituted or unsubstituted (C1-C30)-alkyl-(C6-C30)-arylamino or may be linked to the adjacent substituents to one or more rings; with the proviso that when one of L 7 to L 9 is a phenylene which is unsubstituted or substituted by deuterium or cyano, at least one of Ar 7 to Ar 9 is a binaphthyl which is unsubstituted or substituted by deuterium or cyano, and when one of L 7 to L 9 is a naphthylene which is unsubstituted or substituted by deuterium or cyano, at least one of Ar 7 to Ar 9 is a phenylnaphthyl which is unsubstituted or substituted by deuterium or cyano.The organic electroluminescent compound according to claim 12, wherein the organic electroluminescent compound represented by formula 3' is selected from the following compounds: wherein in the above compounds D n means that n hydrogen atoms are replaced by deuterium, n being an integer having a value of 1 or more, the upper limit of n depending on the number of hydrogen atoms which can be replaced in each compound.An organic electroluminescent device comprising an organic electroluminescent compound according to claim 12.

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