Light emitting element and electronic device including the same

Abstract

The invention relates to a light emitting element and an electronic device including the same. The present invention provides a light-emitting element comprising: an anode; the cathode is opposite to the anode; and an intermediate layer interposed between the anode and the cathode and including a light emitting layer, in which the light emitting layer includes a first host, a second host, a first dopant, and a second dopant, the first host and the second host are bonded to each other to form an exciplex host, the first dopant is a metal complex, and the second dopant is a metal complex. The second dopant is a compound containing boron, and the light-emitting element satisfies the following conditions 1) to 3): 1) T1 (HE) gt; t1 (D1) gt; t1 (D2); 2) the knrS value is constant as the temperature rises from room temperature; and (3) the knrT value is increased along with the increase of the temperature from room temperature.

Description

Technical Field

[0001] Disclosed is a light-emitting element and an electronic device including the light-emitting element. Background Art

[0002] Compared with conventional elements, an organic light emitting device, as a self-luminous element, has a wide viewing angle, excellent contrast, short response time, and excellent brightness, driving voltage, and response speed characteristics.

[0003] The organic light emitting device may have a structure in which a first electrode is disposed on a substrate, and a hole transport region, a light-emitting layer, an electron transport region, and a second electrode are sequentially disposed on the first electrode. Holes injected from the first electrode move to the light-emitting layer through the hole transport region, and electrons injected from the second electrode move to the light-emitting layer through the electron transport region. Carriers such as the holes and the electrons recombine in the light-emitting layer region to generate excitons. The excitons generate light while changing from an excited state to a ground state. Summary of the Invention

[0004] Provided are a light-emitting element having an improved lifespan and an electronic device including the light-emitting element.

[0005] According to one aspect, provided is a light-emitting element including:

[0006] An anode;

[0007] A cathode facing the anode; and

[0008] An intermediate layer interposed between the anode and the cathode and including a light-emitting layer,

[0009] wherein the light-emitting layer includes a first host, a second host, a first dopant, and a second dopant,

[0010] The first host and the second host are combined with each other to form an exciplex host,

[0011] The first dopant is a metal complex,

[0012] The second dopant is a boron-containing compound,

[0013] The light-emitting element satisfies the following conditions 1) to 3):

[0014] 1) T1(HE)>T1(D1)>T1(D2);

[0015] 2) k nr S The value remains constant as the temperature increases from room temperature;

[0016] 3) k nr T The value increases as the temperature increases from room temperature,

[0017] wherein, in the said conditions 1) to the said condition 3),

[0018] T1(HE) is the lowest excited triplet energy level of the exciplex host,

[0019] T1(D1) is the lowest excited triplet energy level of the first dopant,

[0020] T1(D2) is the lowest excited triplet energy level of the second dopant,

[0021] k nr S is the non-radiative rate constant of the lowest excited singlet state of the exciplex host (nonradiative rate constant),

[0022] k nr T is the non-radiative rate constant of the lowest excited triplet state of the exciplex host.

[0023] According to another aspect, there is provided an electronic device including the light-emitting element.

[0024] The efficiency and lifespan of the light-emitting element according to one implementation example are excellent. Brief Description of the Drawings

[0025] Figure 1 is an energy level diagram of an exciplex host according to one implementation example.

[0026] Figure 2 is a diagram schematically showing the structure of a light-emitting element according to one implementation example.

[0027] Figure 3 is a cross-sectional view of an electronic device according to one implementation example.

[0028] Figure 4 is a cross-sectional view of an electronic device according to another implementation example.

[0029] Figure 5 is a photoluminescence spectrum diagram of compound HT-07, compound ET06, and their mixture.

[0030] Figure 6It is a graph of the photoluminescence intensity of the thin film of Test Example 1 measured in the nanosecond time region at different times.

[0031] Figure 7 It is a graph of the photoluminescence intensity of the thin film of Test Example 1 measured in the microsecond time region at different times. Detailed implementation mode

[0032] In this specification, "exciplex host" means a host formed by a combination of hosts that form an exciplex in a light-emitting layer or an exciplex formed by the combination of the hosts.

[0033] An exciplex refers to a complex of short-lived excited states formed between two molecules (for example, an electron donor and an electron acceptor).

[0034] In this specification, "high temperature" means a temperature higher than room temperature, referring to a temperature of about 40°C to 60°C.

[0035] In this specification, "k nr S value is constant as the temperature increases" means that the k nr S value changes within 2% based on the k nr S value.

[0036] According to one aspect of the light-emitting element, it includes:

[0037] An anode;

[0038] A cathode, facing the anode; and

[0039] An intermediate layer, sandwiched between the anode and the cathode and including a light-emitting layer,

[0040] wherein the light-emitting layer includes a first host, a second host, a first dopant, and a second dopant,

[0041] the first host and the second host are combined with each other to form an exciplex host,

[0042] the first dopant is a metal complex,

[0043] the second dopant is a boron-containing compound.

[0044] The first host may be a hole-transporting host, and the second host may be an electron-transporting host.

[0045] The difference in the highest occupied molecular orbital (HOMO) energy levels and the difference in the lowest unoccupied molecular orbital (LUMO) energy levels between the first main body and the second main body can be 0.2 eV or more, respectively.

[0046] For example, the difference in the HOMO energy levels between the first main body and the second main body can be greater than 0.2 eV and can be below the bandgap of the second main body.

[0047] For example, the difference in the LUMO energy levels between the first main body and the second main body can be greater than 0.2 eV and can be below the bandgap of the second main body.

[0048] Since the first main body and the second main body have the differences in HOMO and LUMO energy levels as described above, an exciplex can be formed. In one implementation example, the photoluminescence of the exciplex main body can exhibit both prompt fluorescence and delayed fluorescence. At this time, the energy difference ΔE ST between the lowest excited singlet state S1 and the lowest excited triplet state T1 of the exciplex main body can be 0.2 eV or less. All of the prompt fluorescence and the delayed fluorescence of the exciplex main body can be applied to the formation of excitons in the triplet excited state of the first dopant.

[0049] The first dopant can act as an energy transfer agent as a photosensitizer in the phosphorescent dopant series.

[0050] In the second dopant, the energy difference ΔE ST between the lowest excited singlet state S1 and the lowest excited triplet state T1 can be 0.2 eV or less, and it can be a delayed fluorescence emitter.

[0051] The light-emitting element satisfies the following condition 1) to the following condition 3):

[0052] 1) T1(HE) > T1(D1) > T1(D2);

[0053] 2) The k nr S value is constant as the temperature increases from room temperature;

[0054] 3) The k nr T value increases as the temperature increases from room temperature,

[0055] wherein, in the above condition 1) to the condition 3),

[0056] T1(HE) is the lowest excited triplet state energy level of the exciplex main body,

[0057] T1(D1) is the lowest excited triplet state energy level of the first dopant,

[0058] T1(D2) is the lowest excited triplet state energy level of the second dopant,

[0059] k nr S is the non-radiative rate constant of the lowest excited singlet state of the exciplex host,

[0060] k nr T is the non-radiative rate constant of the lowest excited triplet state of the exciplex host.

[0061] According to condition 1), the energy of the lowest excited triplet state T1 of the exciplex is greater than the energy of the lowest excited triplet state T1 of the first dopant, and the energy of the lowest excited triplet state T1 of the first dopant is greater than the energy of the lowest excited triplet state T1 of the second dopant. Thus, the energy of the lowest excited triplet state T1 of the exciplex can be easily transferred to the lowest excited triplet state T1 of the first dopant and the second dopant, so that the second dopant can emit delayed fluorescence.

[0062] Regarding condition 2) and condition 3), refer to Figure 1 for description.

[0063] Figure 1 is the energy level diagram of the exciplex host at room temperature according to an implementation example. Refer to Figure 1 , the exciplex host has the lowest excited singlet state S1 and the lowest excited triplet state T1. The exciton of the lowest excited singlet state S1 can undergo radiative decay, non-radiative decay, and intersystem crossing to the lowest excited triplet state T1. The exciton of the lowest excited triplet state T1 can undergo non-radiative decay and reverse intersystem crossing to the lowest excited singlet state S1.

[0064] The radiative decay, non-radiative decay, and intersystem crossing of the lowest excited singlet state S1 can be represented by the radiative rate constant k r S , the non-radiative rate constant k nr S and the intersystem crossing rate constant k ISC respectively. The non-radiative decay and reverse intersystem crossing of the lowest excited triplet state T1 can be represented by the non-radiative rate constant k nr Tand the reverse intersystem crossing rate constant k RISC is represented by

[0065] Condition 2) above indicates that the non-radiative rate constant of the lowest excited singlet state S1 of the exciplex host does not change with temperature. This can indicate that the excitons in the lowest excited singlet state do not affect the device efficiency with temperature. The lowest excited singlet state S1 indicates that since radiative decay and non-radiative decay compete with each other, if the non-radiative rate constant does not change with temperature, the radiative rate constant also does not change with temperature. Therefore, in the range from room temperature to 60 °C, the decay curves of the time-resolved photoluminescence of the prompt fluorescence of the exciplex host can overlap with each other.

[0066] Condition 3) above indicates that the non-radiative decay of the excitons in the lowest excited triplet state T1 of the exciplex host increases with increasing temperature. If the luminescence lifetime of the triplet excitons is short, the triplet excitons transferred by Dexter energy transfer to the second dopant can be reduced, thereby improving the device lifetime. If the lifetime of the device becomes longer at high temperatures, it can be beneficial for applications such as automotive displays.

[0067] According to one implementation example, the intermediate layer may further include: a hole transport region disposed between the anode and the light-emitting layer and including a hole injection layer, a hole transport layer, an electron blocking layer, or any combination thereof.

[0068] According to one implementation example, the intermediate layer may further include: an electron transport region disposed between the cathode and the light-emitting layer and including a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0069] According to one implementation example, the first host may include a compound represented by the following Chemical Formula 1.

[0070] <Chemical Formula 1>

[0071]

[0072] In Chemical Formula 1, R1, R2, and Ar1 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazone group, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphoric acid group or its salt, substituted or unsubstituted C1-C 60 alkyl group, substituted or unsubstituted C2-C 60 alkenyl group, substituted or unsubstituted C2-C 60 alkynyl group, substituted or unsubstituted C1-C 60 alkoxy group, substituted or unsubstituted C3-C 10 cycloalkyl group, substituted or unsubstituted C1-C10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) and -P(=O)(Q1)(Q2),

[0073] L1 is selected from substituted or unsubstituted C4-C 60 carbocyclic group and substituted or unsubstituted C1-C 60 heterocyclic group,

[0074] a1 and a2 are each independently an integer from 1 to 4,

[0075] b1 is an integer from 0 to 3,

[0076] selected from the substituted C1-C 60 alkyl, the substituted C2-C 60 alkenyl, the substituted C2-C 60 alkynyl, the substituted C1-C 60 alkoxy, the substituted C3-C 10 cycloalkyl, the substituted C1-C 10 heterocycloalkyl, the substituted C3-C 10 cycloalkenyl, the substituted C1-C 10 heterocycloalkenyl, the substituted C6-C 60 aryl, the substituted C6-C 60 aryloxy, the substituted C6-C 60 arylthio, the substituted C1-C 60 heteroaryl, the substituted monovalent non-aromatic fused polycyclic group, the substituted monovalent non-aromatic fused heteropolycyclic group, the substituted C4-C 60 carbocyclic group and the substituted C1-C 60 heterocyclic group, and at least one substituent is selected from:

[0077] Deuterium (-D), -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl and C1-C 60 alkoxy;

[0078] substituted by at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amidino, hydrazino, hydrazono, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), and -P(=O)(Q 11 )(Q 12 ) of C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl and C1-C 60 alkoxy;

[0079] C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic condensed heteropolycyclic group;

[0080] substituted by at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) in which at least one substitutes a C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic fused polycyclic group and monovalent non-aromatic fused heteropolycyclic group; and

[0081] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) and -P(=O)(Q 31 )(Q 32 ),

[0082] Said Q1 to said Q3, said Q 11 to said Q 13 、said Q 21 to said Q 23 and said Q31 to the said Q 33 Each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl and terphenyl.

[0083] Ar1 may be a substituted or unsubstituted carbazolyl group.

[0084] According to one embodiment, R1, R2 and Ar1 may each independently be selected from hydrogen, deuterium and the following chemical

[0085] formulas 2a to the following chemical formula 2c.

[0086]

[0087] In the above chemical formulas, H1 represents NR 100 , O or S, Z1 to Z5 and R 100 Each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl and terphenyl, az1 is an integer from 1 to 5, az2 and az3 are each independently integers from 1 to 4, az4 and az5 are each independently integers from 1 to 3, * represents a bond to an adjacent atom.

[0088] According to one embodiment, L1 may be selected from the following chemical formulas 3a to the following chemical formula 3c.

[0089]

[0090] In the above chemical formula, Z6 to Z9 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl, and terphenyl, az6 is an integer from 1 to 4, az7 is an integer from 1 to 7, az8 is an integer from 1 to 6, * and *' represent bonds to adjacent atoms.

[0091] According to one implementation example, the first host may include any one of the following compounds HT-01 to the following compound HT-09.

[0092]

[0093] According to one implementation example, the second host may include the compound represented by the following Chemical Formula 2.

[0094] <Chemical Formula 2>

[0095]

[0096] In the Chemical Formula 2, Ar 11 to Ar 13 refer to Ar1 in Chemical Formula 1.

[0097] The Ar 11 to the Ar 13 at least one of which may be tritylphenyl, triphenylsilylphenyl, or N-phenylcarbazolyl.

[0098] In the Chemical Formula 2, L 11 to L 13 refer to L1 in Chemical Formula 1.

[0099] In the Chemical Formula 2, b11 to b13 may each independently be an integer from 0 to 3.

[0100] According to one implementation example, Ar 11 to Ar13 may be independently selected from hydrogen, deuterium, and the following Chemical Formula 4a to the following Chemical Formula 4e, respectively.

[0101]

[0102] In the above chemical formulas, Z 10 to Z 19 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, biphenyl, and terphenyl, az17 is an integer from 1 to 7, az18 is an integer from 1 to 8, az19 is an integer from 1 to 5, and * represents a bond to an adjacent atom.

[0103] According to one embodiment, L 11 to L 13 may be independently selected from the following Chemical Formula 5a.

[0104]

[0105] In the above chemical formula, Z 20 is selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, biphenyl, and terphenyl, az20 is an integer from 1 to 4, and * and *' represent bonds to adjacent atoms.

[0106] According to one implementation example, the second host may include any one of the following compounds ET01 to the following compound ET12.

[0107]

[0108] According to one implementation example, in the light-emitting layer, the weight ratio of the first host to the second host may be from 1:9 to 9:1.

[0109] For example, the weight ratio of the first host to the second host may be from 3:7 to 7:3. The weight ratio of the first host to the second host may be from 4:5 to 5:4.

[0110] When the weight ratio of the first host to the second host is within the above range, the balance between electrons and holes may be appropriate.

[0111] According to one implementation example, the metal of the first dopant may be a transition metal.

[0112] According to one implementation example, the first dopant may include an organometallic compound represented by the following Chemical Formula 401.

[0113] <Chemical Formula 401>

[0114] M(L 401 ) xc1 (L 402 ) xc2

[0115] <Chemical Formula 402>

[0116]

[0117] In the Chemical Formula 401 and the Chemical Formula 402,

[0118] M is titanium (Ti), cobalt (Co), copper (Cu), zinc (Zn), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), rhenium (Re), platinum (Pt), gold (Au), osmium (Os), iridium (Ir) or rhenium (Re),

[0119] L 401 is a ligand represented by the Chemical Formula 402, xc1 is 1, 2 or 3, and when xc1 is 2 or more, two or more Ls 401 are the same as or different from each other,

[0120] L 402 is an organic ligand, xc2 is 0, 1, 2, 3 or 4, and when xc2 is 2 or more, two or more Ls 402 are the same as or different from each other,

[0121] X401 and X 402 each independently is nitrogen or carbon,

[0122] Ring A 401 and Ring A 402 each independently is a C3-C 60 carbocyclic group or a C1-C 60 heterocyclic group,

[0123] T 401 is a single bond, -O-, -S-, -C(=O)-, -N(Q 411 ), -C(Q 411 )(Q 412 ), -C(Q 411 )=C(Q 412 ), -C(Q 411 )= or =C=,

[0124] X 403 and X 404 each independently is a chemical bond, O, S, N(Q 413 ), B(Q 413 ), P(Q 413 ), C(Q 413 )(Q 414 ), or Si(Q 413 )(Q 414 ),

[0125] R 401 and R 402 each independently is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, a C1-C 10a alkyl group substituted or unsubstituted by at least one R 20 a C1-C 10a alkoxy group substituted or unsubstituted by at least one R 20 a C3-C 10a carbocyclic group substituted or unsubstituted by at least one R 60 a C1-C 10a heterocyclic group substituted or unsubstituted by at least one R 60 -Si(Q 401 )(Q 402 )(Q 403 ), -N(Q 401 )(Q 402 ), -B(Q 401 )(Q 402 ), -C(=O)(Q 401 ), -S(=O)2(Q 401 ), or -P(=O)(Q 401 )(Q 402),

[0126] Optionally, R 401 and R 402 can be connected to form a ring,

[0127] wherein Q 411 to Q 414 and Q 401 to Q 403 are each independently hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxy; cyano; nitro; C1-C 60 alkyl; C2-C 60 alkenyl; C2-C 60 alkynyl; C1-C 60 alkoxy; or a C3-C 60 carbocyclic group which is substituted or unsubstituted with deuterium, -F, cyano, C1-C 60 alkyl, C1-C 60 alkoxy, phenyl, biphenyl or any combination thereof; C1-C 60 heterocyclic group; C7-C 60 aralkyl or C2-C 60 heteroaralkyl,

[0128] xc11 and xc12 are each independently an integer from 0 to 10,

[0129] The * and *' in Chemical Formula 402 are respectively the binding sites to M in Chemical Formula 401.

[0130] For example, in Chemical Formula 402, i) X 401 can be nitrogen and X 402 can be carbon; or ii) both X 401 and X 402 can be nitrogen.

[0131] As another example, in Chemical Formula 401, when xc1 is 2 or more, two or more L 401 in the two ring A 401 are optionally connected to each other through T 402 as a linking group, or the two ring A 402 are optionally connected to each other through T 403 as a linking group. The descriptions of T 402 and T 403 refer to the description of T 401 in this specification respectively.

[0132] The L in Chemical Formula 401 402 can be any organic ligand. For example, the L 402may include a halogen group, a diketone group (e.g., an acetylacetonate group), a carboxylic acid group (e.g., a picolinate group), -C(=O), an isonitrile group, a -CN group, a phosphorus group (e.g., a phosphine group, a phosphite group, etc.) or any combination thereof.

[0133] According to one implementation example, the first dopant may include any one of the following Compounds 1 to 16.

[0134]

[0135]

[0136] According to one implementation example, the second dopant may include a compound represented by the following Chemical Formula 4.

[0137] <Chemical Formula 4>

[0138]

[0139] In Chemical Formula 4, Y1 to Y3 may each independently be O, S, N(R 24 ), B(R 24 ), C(R 24 )(R 25 ), or Si(R 24 )(R 25 ), c may be 0 or 1, A 11 to A 13 may each independently be selected from C5-C 30 carbocyclic groups and C1-C 30 heterocyclic groups, R 21 to R 25 refer to R1 in Chemical Formula 1. R 21 to R 25 may optionally combine with each other to form a substituted or unsubstituted C5-C 30 carbocyclic group and a substituted or unsubstituted C1-C 30 heterocyclic group. When c is 0, it means that Y1 does not exist. a21 to a23 may each independently be an integer selected from 0 to 10.

[0140] According to one implementation example, Chemical Formula 4 may be represented by any one of the following Chemical Formula 4-1 and Chemical Formula 4-2.

[0141] <Chemical Formula 4-1>

[0142]

[0143] <Chemical Formula 4-2>

[0144]

[0145] In the above chemical formulae, Y2 to Y5 may each independently be O, S, N(R 44 ), B(R 44 ), C(R 44 )(R 45 ) or Si(R 44 )(R 45 ), and the definitions of R 31a to R 31d , R 32a to R 32d , R 33a to R 33c , R 34a to R 34d , R 35a to R 35c , R 44 and R 45 are the same as the definition of R 21 in Chemical Formula 4.

[0146] According to one implementation example, R 31a to R 31d , R 32a to R 32d , R 33a to R 33c , R 34a to R 34d , R 35a to R 35c , R 44 and R 45 may each independently be selected from C1-C 60 alkyl and the following Chemical Formulae 6a to 6c.

[0147]

[0148] In the above chemical formulae, Z 21 to Z 24 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl, and terphenyl,

[0149] az21 to az23 can each independently be an integer from 1 to 5, az24 can be an integer from 1 to 8, and * indicates a bond to an adjacent atom.

[0150] According to one implementation example, the second dopant may include any one of the following compounds D-01 to the following compound D-12.

[0151]

[0152]

[0153] According to one implementation example, the light-emitting layer may be a fluorescent light-emitting layer.

[0154] According to one implementation example, the light-emitting layer may be a blue light-emitting layer.

[0155] The present invention provides an electronic device including: a thin-film transistor and the above-described light-emitting element, wherein the thin-film transistor includes a source electrode, a drain electrode, an active layer, and a gate electrode, and a first electrode of the light-emitting element is electrically connected to at least one of the source electrode and the drain electrode of the thin-film transistor. The first electrode of the light-emitting element may be an anode.

[0156] In this specification, "organic layer" is a term referring to all single layers and / or multiple layers interposed between the first electrode and the second electrode in the organic light-emitting element. The substances included in the layers of the "organic layer" are not limited to organic substances.

[0157] [Explanation of Figure 2

[0158] Figure 2 is a cross-sectional view schematically showing a light-emitting element 10 according to one implementation example of the present invention. The light-emitting element 10 includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0159] Hereinafter, the structure and manufacturing method of the light-emitting element 10 according to one implementation example of the present invention will be described as follows with reference to Figure 2

[0160] [First electrode 110]

[0161] A substrate may be additionally disposed on Figure 2 ​​The lower part of the first electrode 110 or the upper part of the second electrode 150. As the substrate, a glass substrate or a plastic substrate can be used. Alternatively, the substrate can be a flexible substrate, for example, it can include plastics with excellent heat resistance and durability such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0162] The first electrode 110, for example, can be formed by providing a first electrode material on the upper part of the substrate using a deposition method or a sputtering method, etc. When the first electrode 110 is an anode, a high work function material that can easily inject holes can be used as the first electrode material.

[0163] The first electrode 110 can be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. To form the first electrode 110 as a transmissive electrode, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), or any combination thereof can be used as the first electrode material. Alternatively, to form the first electrode 110 as a semi-transmissive electrode or a reflective electrode, magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or any combination thereof can be used as the first electrode material.

[0164] The first electrode 110 can have a single-layer structure consisting of a single layer or a multi-layer structure including multiple layers. For example, the first electrode 110 can have a three-layer structure of ITO / Ag / ITO.

[0165] [Intermediate layer 130]

[0166] An intermediate layer 130 is arranged on the upper part of the first electrode 110. The intermediate layer 130 includes a light-emitting layer.

[0167] The intermediate layer 130 can also include a hole transport region arranged between the first electrode 110 and the light-emitting layer and an electron transport region arranged between the light-emitting layer and the second electrode 150.

[0168] The intermediate layer 130 may include, in addition to various organic substances, metal-containing compounds such as organometallic compounds, inorganic substances such as quantum dots, and the like.

[0169] In addition, the intermediate layer 130 may include: i) two or more emitting units stacked in order between the first electrode 110 and the second electrode 150; and ii) a charge generation layer disposed between the two emitting units. When the intermediate layer 130 includes the emitting units and the charge generation layer as described above, the light-emitting element 10 may be a tandem light-emitting element.

[0170] [Hole transport region in the intermediate layer 130]

[0171] The hole transport region may have the following structure: i) a single-layer structure consisting of a single layer composed of a single substance; ii) a single-layer structure consisting of a single layer containing a plurality of different substances; or iii) a multi-layer structure including a plurality of layers containing a plurality of different substances.

[0172] The hole transport region may include a hole injection layer, a hole transport layer, a light-emission assisting layer, an electron blocking layer, or any combination thereof.

[0173] For example, the hole transport region may have a multi-layer structure of a hole injection layer / hole transport layer, a hole injection layer / hole transport layer / light-emission assisting layer, a hole injection layer / light-emission assisting layer, a hole transport layer / light-emission assisting layer, or a hole injection layer / hole transport layer / electron blocking layer stacked in order from the first electrode 110.

[0174] The hole transport region may include a compound represented by the following Chemical Formula 201, a compound represented by the following Chemical Formula 202, or any combination thereof.

[0175] <Chemical Formula 201>

[0176]

[0177] <Chemical Formula 202>

[0178]

[0179] In Chemical Formula 201 and Chemical Formula 202,

[0180] L 201 to L204 may each independently be a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 ,

[0181] L 205 may be *-O-*', *-S-*', *-N(Q 201 )-*', a C1-C 10a alkylene group which is substituted or unsubstituted by at least one R 20 , a C2-C 10a alkenylene group which is substituted or unsubstituted by at least one R 20 , a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 ,

[0182] xa1 to xa4 may each independently be one of the integers from 0 to 5,

[0183] xa5 may be one of the integers from 1 to 10,

[0184] R 201 to R 204 and Q 201 may each independently be a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 ,

[0185] R 201 and R 202 may optionally be joined to each other by a single bond, a C1-C5 alkylene group which is substituted or unsubstituted by at least one R 10a or a C2-C5 alkenylene group which is substituted or unsubstituted by at least one R 10a to form a C8-C 10a polycyclic group which is substituted or unsubstituted by at least one R 60 (e.g., a carbazole group, etc.) (e.g., refer to the following compound HT16, etc.),

[0186] R 203 and R 204 may optionally be joined to each other by a single bond, a C1-C5 alkylene group which is substituted or unsubstituted by at least one R 10aA substituted or unsubstituted C1-C5 alkylene group or one substituted by at least one R 10a A substituted or unsubstituted C2-C5 alkenylene group is connected to each other to form a group substituted by at least one R 10a A substituted or unsubstituted C8-C 60 Polycyclic group

[0187] na1 can be one of the integers from 1 to 4.

[0188] For example, the chemical formula 201 and the chemical formula 202 may each include at least one of the groups represented by the following chemical formula CY201 to the following chemical formula CY217.

[0189]

[0190] In the chemical formula CY201 to the chemical formula CY217, for R 10b and R 10c The descriptions are respectively referred to the description of R in this specification 10a , and the ring CY 201 to the ring CY 204 can independently be a C3-C 20 carbocyclic group or a C1-C 20 heterocyclic group, and at least one hydrogen in the chemical formula CY201 to the chemical formula CY217 can be substituted or unsubstituted by R as described in this specification 10a .

[0191] According to one implementation example, the ring CY in the chemical formula CY201 to the chemical formula CY217 201 to the ring CY 204 can independently be a benzene group, a naphthalene group, a phenanthrene group or an anthracene group.

[0192] According to another embodiment, the chemical formula 201 and the chemical formula 202 may each include at least one of the groups represented by the chemical formula CY201 to the chemical formula CY203.

[0193] According to still another embodiment, the chemical formula 201 may each include at least one of the groups represented by the chemical formula CY201 to the chemical formula CY203 and at least one of the groups represented by the chemical formula CY204 to the chemical formula CY217.

[0194] According to still another implementation example, in the chemical formula 201, xa1 can be 1, R 201 can be a group represented by one of the chemical formula CY201 to the chemical formula CY203, xa2 can be 0, R 202It may be a group represented by one of the chemical formulas CY204 to CY207.

[0195] According to another implementation example, each of the chemical formulas 201 and 202 may not include a group represented by the chemical formulas CY201 to CY203.

[0196] According to another implementation example, each of the chemical formulas 201 and 202 may not include a group represented by the chemical formulas CY201 to CY203, but may include at least one of the groups represented by the chemical formulas CY204 to CY217.

[0197] As another example, each of the chemical formulas 201 and 202 may not include a group represented by the chemical formulas CY201 to CY217.

[0198] For example, the hole transport region may include one of the following compounds HT1 to HT46, m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated-NPB, TAPC, HMTPD, 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA: 4,4',4"-tris(N-carbazolyl)triphenylamine), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA: Polyaniline / Dodecylbenzenesulfonic acid), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS: Poly(3,4-ethylenedioxythiophene) / Poly(4-styrenesulfonate)), polyaniline / camphor sulfonic acid (PANI / CSA: Polyaniline / Camphor sulfonic acid), polyaniline / poly(4-styrenesulfonate) (PANI / PSS: Polyaniline / Poly(4-styrenesulfonate)) or any combination thereof.

[0199]

[0200]

[0201]

[0202]

[0203]

[0204] The thickness of the hole transport region may be about to about (e.g., about to about ). When the hole transport region includes a hole injection layer, a hole transport layer, or any combination thereof, the thickness of the hole injection layer may be about to about (e.g., about to about ), and the thickness of the hole transport layer may be about to about (e.g., about to about ). When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer satisfy the ranges described above, satisfactory hole transport characteristics can be obtained without substantially increasing the driving voltage.

[0205] The light emission assisting layer is a layer that functions to increase the light emission efficiency by compensating for the optical resonance distance caused by the wavelength of the light emitted from the light emitting layer, and the electron blocking layer is a layer that functions to prevent electrons from leaking from the light emitting layer to the hole transport region. The substances that can be included in the hole transport region described above can be included in the light emission assisting layer and the electron blocking layer.

[0206] [p-dopant]

[0207] In addition to the substances described above, the hole transport region may include a charge generation substance for improving conductivity. The charge generation substance may be uniformly or non-uniformly dispersed (e.g., in the form of a single layer composed of the charge generation substance) in the hole transport region.

[0208] The charge generation substance may be, for example, a p-dopant.

[0209] For example, the lowest unoccupied molecular orbital (LUMO) energy level of the p-dopant may be -3.5 eV or less.

[0210] According to one implementation example, the p-dopant may include a quinone derivative, a cyano-containing compound, a compound containing element EL1 and element EL2, or any combination thereof.

[0211] Examples of the quinone derivative may include TCNQ, F4-TCNQ, etc.

[0212] Examples of the cyano-containing compound may include HAT-CN, a compound represented by the following Chemical Formula 221, etc.

[0213]

[0214] <Chemical Formula 221>

[0215]

[0216] In the Chemical Formula 221,

[0217] R 221 to R 223 may independently of one another be a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 group.

[0218] At least one of the R 221 to the R 223 may independently of one another be a C3-C 60 carbocyclic group or a C1-C 60 heterocyclic group which is substituted by the following groups: cyano group; -F; -Cl; -Br; -I; a C1-C 20 alkyl group which is substituted by a cyano group, -F, -Cl, -Br, -I or any combination thereof; or any combination thereof.

[0219] In the compound containing element EL1 and element EL2, element EL1 may be a metal, a metalloid or a combination thereof, and element EL2 may be a non-metal, a metalloid or a combination thereof.

[0220] Examples of the metal may include: alkali metals (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metals (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); transition metals (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); post-transition metals (e.g., zinc (Zn), indium (In), tin (Sn), etc.); and lanthanide metals (e.g., lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), etc.).

[0221] Examples of the metalloid may include silicon (Si), antimony (Sb), tellurium (Te), etc.

[0222] Examples of the non-metal may include oxygen (O), halogens (e.g., F, Cl, Br, I, etc.), etc.

[0223] For example, the compound containing element EL1 and element EL2 may include metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, metal iodides, etc.), metalloid halides (e.g., metalloid fluorides, metalloid chlorides, metalloid bromides, metalloid iodides, etc.), metal tellurides, or any combination thereof.

[0224] Examples of the metal oxides may include tungsten oxides (e.g., WO, W2O3, WO2, WO3, W2O5, etc.), vanadium oxides (e.g., VO, V2O3, VO2, V2O5, etc.), molybdenum oxides (MoO, Mo2O3, MoO2, MoO3, Mo2O5, etc.), rhenium oxides (e.g., ReO3, etc.), etc.

[0225] Examples of the metal halides may include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, lanthanide metal halides, etc.

[0226] Examples of the alkali metal halides may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, etc.

[0227] Examples of the alkaline earth metal halides may include BeF2, MgF2, CaF2, SrF2, BaF2, BeCl2, MgCl2, CaCl2, SrCl2, BaCl2, BeBr2, MgBr2, CaBr2, SrBr2, BaBr2, BeI2, MgI2, CaI2, SrI2, BaI2, etc.

[0228] Examples of the transition metal halides may include halides of titanium (e.g., TiF4, TiCl4, TiBr4, TiI4, etc.), halides of zirconium (e.g., ZrF4, ZrCl4, ZrBr4, ZrI4, etc.), halides of hafnium (e.g., HfF4, HfCl4, HfBr4, HfI4, etc.), halides of vanadium (e.g., VF3, VCl3, VBr3, VI3, etc.), halides of niobium (e.g., NbF3, NbCl3, NbBr3, NbI3, etc.), halides of tantalum (e.g., TaF3, TaCl3, TaBr3, TaI3, etc.), halides of chromium (e.g., CrF3, CrCl3, CrBr3, CrI3, etc.), halides of molybdenum (e.g., MoF3, MoCl3, MoBr3, MoI3, etc.), halides of tungsten (e.g., WF3, WCl3, WBr3, WI3, etc.), halides of manganese (e.g., MnF2, MnCl2, MnBr2, MnI2, etc.), halides of technetium (e.g., TcF2, TcCl2, TcBr2, TcI2, etc.), halides of rhenium (e.g., ReF2, ReCl2, ReBr2, ReI2, etc.), halides of iron (e.g., FeF2, FeCl2, FeBr2, FeI2, etc.), halides of ruthenium (e.g., RuF2, RuCl2, RuBr2, RuI2, etc.), halides of osmium (e.g., OsF2, OsCl2, OsBr2, OsI2, etc.), halides of cobalt (e.g., CoF2, CoCl2, CoBr2, CoI2, etc.), halides of rhodium (e.g., RhF2, RhCl2, RhBr2, RhI2, etc.), halides of iridium (e.g., IrF2, IrCl2, IrBr2, IrI2, etc.), halides of nickel (e.g., NiF2, NiCl2, NiBr2, NiI2, etc.), halides of palladium (e.g., PdF2, PdCl2, PdBr2, PdI2, etc.), halides of platinum (e.g., PtF2, PtCl2, PtBr2, PtI2, etc.), halides of copper (e.g., CuF, CuCl, CuBr, CuI, etc.), halides of silver (e.g., AgF, AgCl, AgBr, AgI, etc.), halides of gold (e.g., AuF, AuCl, AuBr, AuI, etc.), and the like.

[0229] Examples of the post-transition metal halides may include halides of zinc (e.g., ZnF2, ZnCl2, ZnBr2, ZnI2, etc.), halides of indium (e.g., InI3, etc.), halides of tin (e.g., SnI2, etc.), and the like.

[0230] Examples of the lanthanide metal halides may include YbF, YbF2, YbF3, SmF3, YbCl, YbCl2, YbCl3, SmCl3, YbBr, YbBr2, YbBr3, SmBr3, YbI, YbI2, YbI3, SmI3, etc.

[0231] Examples of the metalloid halides may include halides of antimony (e.g., SbCl5, etc.).

[0232] Examples of the metal tellurides may include alkali metal tellurides (e.g., Li2Te, Na2Te, K2Te, Rb2Te, Cs2Te, etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, BaTe, etc.), transition metal tellurides (e.g., TiTe2, ZrTe2, HfTe2, V2Te3, Nb2Te3, Ta2Te3, Cr2Te3, Mo2Te3, W2Te3, MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu2Te, CuTe, Ag2Te, AgTe, Au2Te, etc.), post-transition metal tellurides (e.g., ZnTe, etc.), lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, etc.), etc.

[0233] [Light-emitting layer in the intermediate layer 130]

[0234] When the light-emitting element 10 is a full-color light-emitting element, the light-emitting layer may be patterned into a red light-emitting layer, a green light-emitting layer, and / or a blue light-emitting layer according to independent sub-pixels. Alternatively, the light-emitting layer may have a structure in which two or more layers of a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer are stacked in a contacting or spaced-apart manner, or a structure in which two or more of a red light-emitting substance, a green light-emitting substance, and a blue light-emitting substance are mixed without distinguishing layers, thereby emitting white light.

[0235] The light-emitting layer may include a host and a dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or any combination thereof.

[0236] Generally based on about 100 parts by weight of the host, the content of the dopant in the light-emitting layer may be about 0.01 part by weight to about 15 parts by weight.

[0237] Alternatively, the light-emitting layer may include quantum dots.

[0238] In addition, the light-emitting layer may include a delayed fluorescence material. The delayed fluorescence material may function as a host or a dopant in the light-emitting layer.

[0239] The thickness of the light-emitting layer may be about to about (e.g., about to about ). When the thickness of the light-emitting layer satisfies the above range, excellent light-emitting characteristics can be exhibited without substantially increasing the driving voltage.

[0240] [Host in the light-emitting layer]

[0241] The host may include the above-mentioned first host and second host.

[0242] In addition to the above-mentioned first host and second host, for example, the host may further include a compound represented by the following Chemical Formula 301.

[0243] [Chemical Formula 301]

[0244] [Ar 301 xb11 -[(L 301 ) xb1 -R 301 xb21

[0245] In Chemical Formula 301,

[0246] Ar 301 and L 301 are each independently a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 ,

[0247] xb11 is 1, 2 or 3,

[0248] xb1 is one of integers from 0 to 5,

[0249] R 301 is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, a C1-C 10a alkyl group which is substituted or unsubstituted by at least one R 60 , a C2-C 10a alkenyl group which is substituted or unsubstituted by at least one R 60 , a C2-C 10a alkynyl group which is substituted or unsubstituted by at least one R 60 alkynyl group, substituted or unsubstituted by at least one R​​10a Substituted or unsubstituted C1-C 60 alkoxy group, at least one R 10a substituted or unsubstituted C3-C 60 carbocyclic group, at least one R 10a substituted or unsubstituted C1-C 60 heterocyclic group, -Si(Q 301 )(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O)2(Q 301 ) or -P(=O)(Q 301 )(Q 302 ), xb21 is one of the integers from 1 to 5,

[0250] For the descriptions of Q 301 to Q 303 , refer to the description of Q1 in this specification respectively.

[0251] For example, when xb11 in the chemical formula 301 is 2 or more, two or more Ar 301 can be connected to each other by a single bond.

[0252] As another example, the host may include a compound represented by the following chemical formula 301-1, a compound represented by the following chemical formula 301-2, or any combination thereof.

[0253] <Chemical formula 301-1>

[0254]

[0255] <Chemical formula 301-2>

[0256]

[0257] In the chemical formula 301-1 and the chemical formula 301-2,

[0258] Ring A 301 to Ring A 304 are each independently a C3-C 10a carbocyclic group substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group substituted or unsubstituted by at least one R 60 ,

[0259] X301 is O, S, N[(L 304 ) xb4 -R 304 , C(R 304 )(R 305 ) or Si(R 304 )(R 305 ),

[0260] xb22 and xb23 are each independently 0, 1 or 2,

[0261] For the description of L 301 , xb1 and R 301 , refer to the descriptions in this specification respectively,

[0262] For the description of L 302 to L 304 , refer to the description of the said L 301 independently of each other. For the description of xb2 to xb4, refer to the description of the said xb1 independently of each other,

[0263] For the description of R 302 to R 305 and R 311 to R 314 , refer to the description of the said R 301 respectively.

[0264] As another example, the host may include an alkaline earth metal complex, a late transition metal complex or any combination thereof. For example, the host may include a Be complex (e.g., the following compound H55), a Mg complex, a Zn complex or any combination thereof.

[0265] As another example, the host may include one of the following compounds H1 to compound H128, 9,10-di(2-naphthyl)anthracene (ADN: 9,10-Di(2-naphthyl)anthracene), 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN: 2-Methyl-9,10-bis(naphthalen-2-yl)anthracene), 9,10-di(2-naphthyl)-2-t-butyl-anthracene (TBADN: 9,10-di(2-naphthyl)-2-t-butyl-anthracene), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP: 4,4'-bis(N-carbazolyl)-1,1'-biphenyl), 1,3-di-9-carbazolylbenzene (mCP: 1,3-di-9-carbazolylbenzene), 1,3,5-tri(carbazol-9-yl)benzene (TCP: 1,3,5-tri(carbazol-9-yl)benzene), or any combination thereof.

[0266]

[0267]

[0268]

[0269]

[0270]

[0271]

[0272]

[0273] [Phosphorescent dopant]

[0274] The first dopant described above may include a phosphorescent dopant.

[0275] According to one embodiment, the content of the first dopant may be 10 wt% to 15 wt% (based on 100 parts by weight of the entire host). When the content of the first dopant is within the above range, the efficiency life of the light-emitting element is excellent.

[0276] [Thermally activated delayed fluorescence (TADF) material]

[0277] The light-emitting layer may include a thermally activated delayed fluorescence (TADF) material.

[0278] The second dopant described above may include a thermally activated delayed fluorescence (TADF) material.

[0279] According to one implementation example, the content of the second dopant may be 0.5 wt% to 2.5 wt% (based on 100 parts by weight of the entire main body). When the content of the second dopant is within the above range, the efficiency life of the light-emitting element is excellent.

[0280] [Electron transport region in the intermediate layer 130]

[0281] The electron transport region may have the following structure: i) a single-layer structure consisting of a single layer composed of a single substance; ii) a single-layer structure consisting of a single layer containing a plurality of different substances from each other; or iii) a multi-layer structure including a plurality of layers containing a plurality of different substances from each other.

[0282] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0283] For example, the electron transport region may have a structure such as an electron transport layer / electron injection layer or a hole blocking layer / electron transport layer / electron injection layer stacked in sequence starting from the light-emitting layer.

[0284] The electron transport region (for example, the hole blocking layer or the electron transport layer in the electron transport region) may include a metal-free compound containing at least one π electron-deficient nitrogen-containing C1-C 60 cyclic group. 60

[0285] For example, the electron transport region may include a compound represented by the following Chemical Formula 601.

[0286] [Chemical Formula 601]

[0287] [Ar 601 xe11 -[(L 601 ) xe1 -R 601 xe21

[0288] In Chemical Formula 601,

[0289] Ar 601 and L 601 may each independently be a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C3-C 10a ​​Substituted or unsubstituted C1-C 60 heterocyclic group,

[0290] xe11 can be 1, 2 or 3,

[0291] xe1 can be 0, 1, 2, 3, 4 or 5,

[0292] R 601 can be a C3-C 10a carbocyclic group substituted or unsubstituted by at least one R 60 a C1-C 10a heterocyclic group substituted or unsubstituted by at least one R 60 -Si(Q 601 )(Q 602 )(Q 603 )、-C(=O)(Q 601 )、-S(=O)2(Q 601 ) or -P(=O)(Q 601 )(Q 602 ),

[0293] For the description of said Q 601 to said Q 603 reference can be made respectively to the description of Q1 in this specification,

[0294] xe21 can be 1, 2, 3, 4 or 5,

[0295] Said Ar 601 、said L 601 and said R 601 at least one of them can independently of each other be a π-deficient nitrogen-containing C1-C 10a ring group substituted or unsubstituted by at least one R 60 .

[0296] For example, in said Chemical Formula 601, when xe11 is more than 2, two or more Ars 601 can be connected to each other by a single bond.

[0297] As another example, in said Chemical Formula 601, Ar 601 can be a substituted or unsubstituted anthracene group.

[0298] As still another example, said electron transport region can include a compound represented by the following Chemical Formula 601-1.

[0299] <Chemical Formula 601-1>

[0300]

[0301] In said Chemical Formula 601-1,

[0302] X 614 may be N or C(R 614 ), X 615 may be N or C(R 615 ), X 616 may be N or C(R 616 ), X 614 to X 616 at least one of which may be N,

[0303] Regarding L 611 to L 613 the descriptions may respectively refer to the descriptions of the said L 601 .

[0304] Regarding xe611 to xe613, the descriptions may respectively refer to the description of the said xe1,

[0305] Regarding R 611 to R 613 the descriptions may respectively refer to the descriptions of the said R 601 .

[0306] R 614 to R 616 may independently of one another be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C1-C 20 alkyl, C1-C 20 alkoxy, a C3-C 10a carbocyclic group which is substituted or unsubstituted by at least one R 60 or a C1-C 10a heterocyclic group which is substituted or unsubstituted by at least one R 60 .

[0307] For example, in the said Chemical Formula 601 and the said Chemical Formula 601-1, xe1 and xe611 to xe613 may independently of one another be 0, 1 or 2.

[0308] The said electron transport region may include one of the following compounds ET1 to the following compound ET45, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP: 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), 4,7-diphenyl-1,10-phenanthroline (Bphen: 4,7-Diphenyl-1,10-phenanthroline), Alq3, BAlq, TAZ, NTAZ or any combination thereof.

[0309]

[0310]

[0311]

[0312] The thickness of the electron transport region may be about to about (e.g., about to about ). In the case where the electron transport region includes a hole blocking layer, an electron transport layer, or any combination thereof, the thickness of the hole blocking layer or the electron transport layer may be independently about to about (e.g., about to about ). The thickness of the electron transport layer may be about to about (e.g., about to about ). When the thickness of the hole blocking layer and / or the electron transport layer satisfies the ranges described above, satisfactory electron transport characteristics can be obtained without substantially increasing the driving voltage.

[0313] In addition to the materials described above, the electron transport region (e.g., the electron transport layer in the electron transport region) may further include a metal-containing material.

[0314] The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The metal ion of the alkali metal complex may be a Li ion, a Na ion, a K ion, a Rb ion, or a Cs ion, and the metal ion of the alkaline earth metal complex may be a Be ion, a Mg ion, a Ca ion, a Sr ion, or a Ba ion. The ligands coordinated with the metal ions of the alkali metal complex and the alkaline earth metal complex may independently include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0315] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, the following compound ET-D1(LiQ) or the following compound ET-D2.

[0316]

[0317] The electron transport region may include an electron injection layer that facilitates the injection of electrons from the second electrode 150. The electron injection layer may be in direct contact with the second electrode 150.

[0318] The electron injection layer may have the following structures: i) a single-layer structure consisting of a single layer composed of a single substance; ii) a single-layer structure consisting of a single layer containing a plurality of different substances; or iii) a multi-layer structure having a plurality of layers containing a plurality of different substances.

[0319] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0320] The alkali metal may include Li, Na, K, Rb, Cs, or any combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba, or any combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd, or any combination thereof.

[0321] The alkali metal compound, the alkaline earth metal compound, and the rare earth metal compound may include oxides, halides (e.g., fluorides, chlorides, bromides, iodides, etc.), tellurides, or any combination thereof of the alkali metal, the alkaline earth metal, and the rare earth metal, respectively.

[0322] The alkali metal compound may include alkali metal oxides such as Li2O, Cs2O, K2O, etc., alkali metal halides such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, etc., or any combination thereof. The alkaline earth metal compound may include, for example, BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying 0 < x < 1), Ba x Ca 1-xAlkaline earth metal oxides such as O (where x is a real number satisfying 0 < x < 1). The rare earth metal-containing compound may include YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, TbF3, YbI3, ScI3, TbI3, or any combination thereof. Alternatively, the rare earth metal-containing compound may include lanthanide metal tellurides. Examples of the lanthanide metal tellurides may include LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, La2Te3, Ce2Te3, Pr2Te3, Nd2Te3, Pm2Te3, Sm2Te3, Eu2Te3, Gd2Te3, Tb2Te3, Dy2Te3, Ho2Te3, Er2Te3, Tm2Te3, Yb2Te3, Lu2Te3, etc.

[0323] The alkali metal complex, the alkaline earth metal complex, and the rare earth metal complex may include: i) one of the ions of the alkali metal, alkaline earth metal, and rare earth metal as described above; and ii) as ligands bound to the metal ion, for example, hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0324] The electron injection layer may be composed only of the alkali metal, alkaline earth metal, rare earth metal, alkali metal-containing compound, alkaline earth metal-containing compound, rare earth metal-containing compound, alkali metal complex, alkaline earth metal complex, rare earth metal complex, or any combination thereof as described above, or may further include an organic substance (for example, the compound represented by the chemical formula 601).

[0325] According to one implementation example, the electron injection layer may i) consist of an alkali metal-containing compound (for example, an alkali metal halide), or ii) consist of a) an alkali metal-containing compound (for example, an alkali metal halide); and b) an alkali metal, alkaline earth metal, rare earth metal, or any combination thereof. For example, the electron injection layer may be a KI:Yb co-deposited layer, an RbI:Yb co-deposited layer, a LiF:Yb co-deposited layer, etc.

[0326] When the electron injection layer further includes an organic substance, the alkali metal, alkaline earth metal, rare earth metal, alkali metal-containing compound, alkaline earth metal-containing compound, rare earth metal-containing compound, alkali metal complex, alkaline earth metal complex, rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix including the organic substance.

[0327] The thickness of the electron injection layer may be about to about about to about When the thickness of the electron injection layer satisfies the range described above, satisfactory electron injection characteristics can be achieved without substantially increasing the driving voltage.

[0328] [Second electrode 150]

[0329] A second electrode 150 is disposed on the upper portion of the intermediate layer 130 described above. The second electrode 150 may be a cathode serving as an electron injection electrode. In this case, a metal, alloy, conductive compound, or any combination thereof having a low work function may be used as the material for the second electrode 150.

[0330] The second electrode 150 may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ytterbium (Yb), silver-ytterbium (Ag-Yb), ITO, IZO, or any combination thereof. The second electrode 150 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0331] The second electrode 150 may have a single-layer structure of a single layer or a multi-layer structure including multiple layers.

[0332] [Cover layer]

[0333] A first cover layer may be disposed outside the first electrode 110, and / or a second cover layer may be disposed outside the second electrode 150. Specifically, the light-emitting element 10 may have a structure in which a first cover layer, a first electrode 110, an intermediate layer 130, and a second electrode 150 are stacked in sequence; a structure in which a first electrode 110, an intermediate layer 130, a second electrode 150, and a second cover layer are stacked in sequence; or a structure in which a first cover layer, a first electrode 110, an intermediate layer 130, a second electrode 150, and a second cover layer are stacked in sequence.

[0334] The light generated in the light-emitting layer in the intermediate layer 130 of the light-emitting element 10 may be extracted toward the outside through the first electrode 110 and the first cover layer that are a semi-transmissive electrode or a transmissive electrode, and the light generated in the light-emitting layer in the intermediate layer 130 of the light-emitting element 10 may be extracted toward the outside through the second electrode 150 and the second cover layer that are a semi-transmissive electrode or a transmissive electrode.

[0335] The first covering layer and the second covering layer can increase the external light-emitting efficiency based on the principle of constructive interference. As a result, the light extraction efficiency of the light-emitting element 10 is increased, so that the light-emitting efficiency of the light-emitting element 10 can be improved.

[0336] Each of the first covering layer and the second covering layer may include a substance having a refractive index (at 589 nm) of about 1.6 or more.

[0337] The first covering layer and the second covering layer may be independently an organic covering layer including an organic substance, an inorganic covering layer including an inorganic substance, or an organic-inorganic composite covering layer including an organic substance and an inorganic substance.

[0338] At least one of the first covering layer and the second covering layer may independently include a carbocyclic compound, a heterocyclic compound, an amino-containing compound, porphine derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, alkali metal complexes, alkaline earth metal complexes, or any combination thereof. The carbocyclic compound, the heterocyclic compound, and the amino-containing compound may be selectively substituted with substituents containing O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof. According to one implementation example, at least one of the first covering layer and the second covering layer may independently include an amino-containing compound.

[0339] For example, at least one of the first covering layer and the second covering layer may independently include a compound represented by Chemical Formula 201, a compound represented by Chemical Formula 202, or any combination thereof.

[0340] According to another implementation example, at least one of the first covering layer and the second covering layer may independently include one of the compounds HT28 to HT33, one of the following compounds CP1 to CP6, β-NPB, or any combination thereof.

[0341]

[0342] [Electronic device]

[0343] The light-emitting element 10 can be included in various electronic devices. For example, the electronic device including the light-emitting element 10 can be a light-emitting device, an authentication device, etc. Specifically, the electronic device can be a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor or outdoor lighting and / or signaling lamp, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a portable phone, a tablet computer, a phablet, a personal digital assistant (PDA), a wearable device, a notebook computer, a digital camera, a video camera, a viewfinder, a microdisplay, a 3D display, a virtual reality or augmented reality display, a vehicle, a video wall including a plurality of tiled displays, a theater or stadium screen, a light therapy device, and a signboard.

[0344] In addition to the light-emitting element 10, the electronic device (e.g., a light-emitting device) may further include: i) a color filter; ii) a color conversion layer; or iii) a color filter and a color conversion layer. The color filter and / or the color conversion layer can be disposed in the traveling direction of at least one of the lights emitted from the light-emitting element 10. For example, the light emitted from the light-emitting element 10 can be blue light or white light. The description of the light-emitting element 10 refers to the above description. According to one implementation example, the color conversion layer may include quantum dots.

[0345] The electronic device may include a first substrate. The first substrate may include a plurality of sub-pixel regions, the color filter may include a plurality of color filter regions respectively corresponding to the plurality of sub-pixel regions, and the color conversion layer may include a plurality of color conversion regions respectively corresponding to the plurality of sub-pixel regions.

[0346] A pixel defining film is disposed between the plurality of sub-pixel regions to define each sub-pixel region.

[0347] The color filter may further include a plurality of color filter regions and a light-blocking pattern disposed between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light-blocking pattern disposed between the plurality of color conversion regions.

[0348] The multiple color filter regions (or multiple color conversion regions) include: a first region that emits first color light; a second region that emits second color light; and / or a third region that emits third color light, wherein the first color light, the second color light, and / or the third color light may have different maximum emission wavelengths from each other. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. For example, the multiple color filter regions (or multiple color conversion regions) may include quantum dots. Specifically, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include quantum dots. For the description of quantum dots, refer to the records in this specification. Each of the first region, the second region, and / or the third region may further include a scatterer.

[0349] For example, the light-emitting element 10 may emit first light, the first region may absorb the first light and emit first-1 color light, the second region may absorb the first light and emit second-1 color light, and the third region may absorb the first light and emit third-1 color light. At this time, the first-1 color light, the second-1 color light, and the third-1 color light may have different maximum emission wavelengths from each other. Specifically, the first light may be blue light, the first-1 color light may be red light, the second-1 color light may be green light, and the third-1 color light may be blue light.

[0350] In addition to the light-emitting element 10 described above, the electronic device may further include a thin-film transistor. The thin-film transistor may include a source electrode, a drain electrode, and an active layer, wherein any one of the source electrode and the drain electrode may be electrically connected to any one of the first electrode 110 and the second electrode 150 of the light-emitting element 10.

[0351] The thin-film transistor may further include a gate electrode, a gate insulating film, and the like.

[0352] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, or the like.

[0353] The electronic device may further include a sealing portion for sealing the light-emitting element 10. The sealing portion may be disposed between the color filter and / or the color conversion layer and the light-emitting element 10. The sealing portion may allow light from the light-emitting element 10 to be extracted to the outside while preventing external air and moisture from penetrating into the light-emitting element 10. The sealing portion may be a sealing substrate including a transparent glass substrate or a plastic substrate. The sealing portion may be a thin film encapsulation layer including one or more organic layers and / or inorganic layers. In the case where the sealing portion is a thin film encapsulation layer, the electronic device may be flexible.

[0354] On the sealing portion, in addition to the color filter and / or the color conversion layer, various functional layers may be additionally disposed according to the use of the electronic device. Examples of the functional layer may include a touch screen layer, a polarization layer, etc. The touch screen layer may be a pressure-sensitive touch screen layer, a capacitive touch screen layer, or an infrared touch screen layer. For example, the authentication device may be a biometric authentication device for authenticating an individual using biometric information of a living body (e.g., a fingertip, a pupil, etc.).

[0355] In addition to the light-emitting element 10 described above, the authentication device may further include a biometric information collection unit.

[0356] The electronic device may be applied to various displays, light sources, illuminations, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic manuals, electronic dictionaries, electronic game consoles, medical instruments (e.g., electronic thermometers, sphygmomanometers, blood glucose meters, pulse measurement devices, pulse wave measurement devices, electrocardiogram display devices, ultrasonic diagnostic devices, endoscope display devices), fish finders, various measuring instruments, meters (e.g., meters for vehicles, airplanes, ships), projectors, etc.

[0357] [Regarding Figure 3 and Figure 4 description]

[0358] Figure 3 is a cross-sectional view of an electronic device according to an implementation example of the present invention.

[0359] Figure 3 The electronic device of includes a substrate 100, a thin film transistor TFT, a light-emitting element 10, and an encapsulation portion 300 for sealing the light-emitting element 10.

[0360] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 may be disposed on the substrate 100. The buffer layer 210 serves to prevent impurities from penetrating through the substrate 100 and provides a flat surface on the upper portion of the substrate 100.

[0361] The thin film transistor (TFT) may be disposed on the buffer layer 210. The thin film transistor (TFT) may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0362] The active layer 220 may include an inorganic semiconductor such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and includes a source region, a drain region, and a channel region.

[0363] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be disposed on the upper portion of the active layer 220, and the gate electrode 240 may be disposed on the upper portion of the gate insulating film 230.

[0364] An interlayer insulating film 250 may be disposed on the upper portion of the gate electrode 240. The interlayer insulating film 250 is disposed between the gate electrode 240 and the source electrode 260 and between the gate electrode 240 and the drain electrode 270, respectively, so as to insulate the gate electrode 240 from the source electrode 260 and the gate electrode 240 from the drain electrode 270.

[0365] The source electrode 260 and the drain electrode 270 may be disposed on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source region and the drain region of the active layer 220, and the source electrode 260 and the drain electrode 270 may be disposed in contact with the exposed source region and drain region of the active layer 220.

[0366] The thin film transistor (TFT) as described above may be electrically connected to the light-emitting element 10 to drive the light-emitting element 10, and may be covered and protected by a passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or a combination thereof. The light-emitting element 10 may be disposed on the passivation layer 280. The light-emitting element 10 includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0367] The first electrode 110 may be disposed on the passivation layer 280. The passivation layer 280 is disposed in such a manner as not to completely cover the drain electrode 270 but to expose a predetermined region of the drain electrode 270, and the first electrode 110 may be disposed to be connected to the exposed drain electrode 270.

[0368] A pixel defining film 290 including an insulator may be disposed on the first electrode 110. The pixel defining film 290 exposes a predetermined region of the first electrode 110, and the intermediate layer 130 may be formed in the exposed region. The pixel defining film 290 may be a polyimide-based organic film or a polyacrylic-based organic film. Although not shown in Figure 3, but more than a part of the intermediate layer 130 may extend to the upper part of the pixel defining film 290 and be arranged in the form of a common layer.

[0369] The second electrode 150 may be arranged on the intermediate layer 130, and the cover layer 170 may be additionally formed on the second electrode 150. The cover layer 170 may be formed to cover the second electrode 150.

[0370] The encapsulation part 300 may be arranged on the cover layer 170. The encapsulation part 300 may be arranged on the light-emitting element 10 and serve to protect the light-emitting element 10 from the influence of moisture or oxygen. The encapsulation part 300 may include: an inorganic film including silicon nitride (SiN x ), silicon oxide (SiO x ), indium tin oxide, indium zinc oxide, or a combination thereof; an organic film including polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyformaldehyde, polyarylate, hexamethyldisiloxane, acrylic resin (e.g., polymethyl methacrylate, polyacrylic acid, etc.), epoxy resin (e.g., aliphatic glycidyl ether (AGE)), or any combination thereof; or a combination of an inorganic film and an organic film.

[0371] Figure 4 is a cross-sectional view of an electronic device according to another implementation example of the present invention.

[0372] Except that the light-blocking pattern 500 and the functional region 400 are additionally arranged on the upper part of the encapsulation part 300, Figure 4 the electronic device is the same as the Figure 3 electronic device. The functional region 400 may be: i) a color filter region; ii) a color conversion region; or iii) a combination of a color filter region and a color conversion region. According to one implementation example, Figure 4 the light-emitting element 10 included in the electronic device may be a series light-emitting element.

[0373] [Manufacturing Method]

[0374] Each layer included in the hole transport region, the light-emitting layer, and each layer included in the electron transport region may be formed in a predetermined region by using various methods such as vacuum deposition method, spin coating method, casting method, Langmuir-Blodgett (LB) method, inkjet printing method, laser printing method, laser induced thermal imaging (LITI) method, etc.

[0375] In the case of forming each layer included in the hole transport region, the light-emitting layer, and each layer included in the electron transport region by a vacuum deposition method, the deposition conditions can be selected within a deposition temperature range of about 100°C to about 500°C, a degree of vacuum of about 10 -8 torr to about 10 -3 torr, and a deposition rate range of about / sec to about / sec (sec), taking into account the materials to be included in the layer to be formed and the structure of the layer to be formed.

[0376] [Definition of Terms]

[0377] In this specification, the C3-C 60 carbocyclic group means a ring group having 3 to 60 carbon atoms composed only of carbon as ring-forming atoms, and the C1-C 60 heterocyclic group means a ring group having 1 to 60 carbon atoms including heteroatoms as ring-forming atoms in addition to carbon. The C3-C 60 carbocyclic group and the C1-C 60 heterocyclic group may be a monocyclic group composed of one ring or a polycyclic group in which two or more rings are condensed with each other. For example, the number of ring-forming atoms of the C1-C 60 heterocyclic group may be 3 to 61.

[0378] In this specification, the ring group includes both the C3-C 60 carbocyclic group and the C1-C 60 heterocyclic group.

[0379] In this specification, the π-electron-rich C3-C 60 cyclic group (πelectron-rich C3-C 60 cyclic group) means a ring group having 3 to 60 carbon atoms that does not include *-N=*' as a ring-forming part, and the π-electron-deficient nitrogen-containing C1-C 60 cyclic group (πelectron-deficient nitrogen-containing C1-C 60 cyclic group) means a heterocyclic group having 1 to 60 carbon atoms that includes *-N=*' as a ring-forming part.

[0380] For example,

[0381] the C3-C 60The carbocyclic group can be: i) group T1; or ii) a condensed ring group in which two or more groups T1 are condensed with each other (e.g., a cyclopentadiene group, an adamantyl group, a norbornyl group, a benzene group, a pentenyl group, a naphthalene group, an azulene group, an indacene group, an acenaphthene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a benzo[9,10]phenanthrene group, a pyrene group, a perylene group, a pentaphene group, a heptalene group, a tetracene group, a picene group, a hexacene group, a pentacene group, a rubicene group, a coronene group, an ovalene group, an indene group, a fluorene group, a spirobifluorene group, a benzofluorene group, an indenophenanthrene group or an indenoanthracene group),

[0382] The C1-C 60 The heterocyclic group can be: i) group T2; ii) a condensed ring group in which two or more groups T2 are condensed with each other; or iii) a condensed ring group in which one or more groups T2 and one or more groups T1 are condensed with each other (e.g., a pyrrole group, a thiophene group, a furan group, an indole group, a benzindole group, a naphthindole group, an isoindole group, a benzisoindole group, a naphthoisoindole group, a benzosilole group, a benzothiophene group, a benzofuran group, a carbazole group, a dibenzosilole group, a dibenzothiophene group, a dibenzofuran group, an indolocarbazole group, an indolocarbazole group, a benzofurancarbazole group, a benzothiophencarbazole group, a benzosilolecarbazole group, a benzindolocarbazole group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a benzonaphthosilole group, a benzofurandibenzofuran group, a benzofurandibenzothiophene group, a benzothiophendibenzothiophene group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzisoxazole group, a benzothiazole group, a benzisothiazole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a phenanthroline group, a cinnoline group, a phthalazine group, a naphthyridine group, an imidazopyridine group, an imidazopyrimidine group, an imidazotriazine group, an imidazopyrazine group, an imidazopyridazine group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azadibenzothiophene group, an azadibenzofuran group, etc.),

[0383] The π - electron - rich C3-C 60The ring group can be: i) group T1; ii) a condensed ring group formed by the condensation of two or more groups T1 with each other; iii) group T3; iv) a condensed ring group formed by the condensation of two or more groups T3 with each other; or v) a condensed ring group formed by the condensation of one or more groups T3 and one or more groups T1 with each other (for example, the C3-C 60 carbocyclic group, 1H-pyrrole group, silole group, borole group, 2H-pyrrole group, 3H-pyrrole group, thiophene group, furan group, indole group, benzoindole group, naphthoindole group, isoindole group, benzoisoindole group, naphthoisoindole group, benzosilole group, benzothiophene group, benzofuran group, carbazole group, dibenzosilole group, dibenzothiophene group, dibenzofuran group, indolocarbazole group, indolo[2,3-a]carbazole group, benzofuro[2,3-a]carbazole group, benzothieno[2,3-a]carbazole group, benzosilolo[2,3-a]carbazole group, benzoindolo[2,3-a]carbazole group, benzocarbazole group, benzonaphthofuran group, benzonaphthothiophene group, benzonaphthosilole group, benzofuro[2,3-a]dibenzofuran group, benzofuro[2,3-a]dibenzothiophene group, benzothieno[2,3-a]dibenzothiophene group, etc.),

[0384] The π-deficient nitrogen-containing C1-C 60 The ring group can be: i) group T4; ii) a condensed ring group formed by the condensation of two or more groups T4 with each other; iii) a condensed ring group formed by the condensation of one or more groups T4 and one or more groups T1 with each other; iv) a condensed ring group formed by the condensation of one or more groups T4 and one or more groups T3 with each other; or v) a condensed ring group formed by the condensation of one or more groups T4, one or more groups T1 and one or more groups T3 with each other (for example, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzisoxazole group, benzothiazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzoisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazoline group, benzoquinazoline group, phenanthroline group, cinnoline group, phthalazine group, naphthyridine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzosilole group, azadibenzothiophene group, azadibenzofuran group, etc.),

[0385] The group T1 can be a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclobutene group, a cyclopentene group, a cyclopentadiene group, a cyclohexene group, a cyclohexadiene group, a cycloheptene group, an adamantane group, a norbornane (or bicyclo[2.2.1]heptane) group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.2]octyl group or a benzene group,

[0386] The group T2 can be a furan group, a thiophene group, a 1H-pyrrole group, a silole group, a borole group, a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an aza-silole group, an aza-borole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a tetrazine group, a pyrrolidine group, an imidazolidine group, a dihydropyrrole group, a piperidine group, a tetrahydropyridine group, a dihydropyridine group, a hexahydropyrimidine group, a tetrahydropyrimidine group, a dihydropyrimidine group, a piperazine group, a tetrahydropyrazine group, a dihydropyrazine group, a tetrahydropyridazine group or a dihydropyridazine group,

[0387] The group T3 can be a furan group, a thiophene group, a 1H-pyrrole group, a silole group or a borole group,

[0388] The group T4 can be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an aza-silole group, an aza-borole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group or a tetrazine group.

[0389] The terms "ring group", "C3-C" in this specification 60 carbocyclic group, "C1-C" 60 heterocyclic group, "electron-rich C3-C" 60 ring group or "electron-poor nitrogen-containing C1-C" 60A ring group can refer to a group, a monovalent group or a polyvalent group (e.g., a divalent group, a trivalent group, a tetravalent group, etc.) that is condensed with any ring group according to the structure of the chemical formula in which the term is used. For example, a "benzene group" can be a benzo group, a phenyl group, a phenylene group, etc., which can be easily understood by those of ordinary skill in the art according to the structure of the chemical formula including the "benzene group".

[0390] For example, monovalent C3-C 60 carbocyclic groups and monovalent C1-C 60 Examples of heterocyclic groups can include C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic groups and monovalent non-aromatic condensed heteropolycyclic groups, divalent C3-C 60 carbocyclic groups and divalent C1-C 60 Examples of heterocyclic groups can include C3-C 10 subcycloalkyl, C1-C 10 subheterocycloalkyl, C3-C 10 subcycloalkenyl, C1-C 10 subheterocycloalkenyl, C6-C 60 subaryl, C1-C 60 subheteroaryl, divalent non-aromatic condensed polycyclic groups and substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic groups.

[0391] In this specification, C1-C 60 alkyl refers to a straight-chain or branched-chain aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples thereof include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl, tert-decyl, etc. C1-C in this specification 60 alkylene refers to a divalent group having the same structure as the C1-C 60 alkyl.

[0392] In this specification, C2-C 60 alkenyl refers to a group having a C2-C 60A monovalent hydrocarbon group having one or more carbon-carbon double bonds in the middle or at the end of the alkyl group, specific examples thereof including vinyl, propenyl, butenyl, etc. In this specification, C2-C 60 An alkenylene group refers to a divalent group having the same structure as the C2-C 60 alkenyl group.

[0393] In this specification, C2-C 60 An alkynyl group refers to a monovalent hydrocarbon group having one or more carbon-carbon triple bonds in the middle or at the end of the C2-C 60 alkyl group, specific examples thereof including ethynyl, propynyl, etc. C2-C in this specification 60 An alkynylene group refers to a divalent group having the same structure as the C2-C 60 alkynyl group.

[0394] In this specification, C1-C 60 An alkoxy group refers to a monovalent group having the chemical formula -OA 101 (wherein A 101 is the C1-C 60 alkyl group), specific examples thereof including methoxy, ethoxy, isopropoxy, etc.

[0395] In this specification, C3-C 10 A cycloalkyl group refers to a monovalent saturated hydrocarbon ring group having 3 to 10 carbon atoms, specific examples thereof including cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornyl (or bicyclo[2.2.1]heptanyl), bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.2]octyl, etc. C3-C in this specification 10 A cycloalkylene group refers to a divalent group having the same structure as the C3-C 10 cycloalkyl group.

[0396] In this specification, C1-C 10 A heterocycloalkyl group refers to a monovalent ring group having 1 to 10 carbon atoms and including at least one heteroatom as a ring-forming atom in addition to carbon atoms, specific examples thereof including 1,2,3,4-oxatriazolidinyl, tetrahydrofuranyl, tetrahydrothienyl, etc. C1-C in this specification 10 A heterocycloalkylene group refers to a divalent group having the same structure as the C1-C 10 heterocycloalkyl group.

[0397] In this specification, C3-C 10 Cycloalkenyl refers to a monovalent cyclic group having 3 to 10 carbon atoms, which means a group having at least one carbon-carbon double bond in the ring but not having aromaticity. Specific examples thereof include cyclopentenyl, cyclohexenyl, cycloheptenyl, etc. In this specification, C3-C 10 Subcycloalkenyl refers to a divalent group having the same structure as the C3-C 10 cycloalkenyl.

[0398] In this specification, C1-C 10 Heterocycloalkenyl refers to a monovalent cyclic group having 1 to 10 carbon atoms in which at least one heteroatom is included as a ring-forming atom in addition to carbon atoms, and having at least one double bond in the ring. The C1-C 10 Specific examples of the heterocycloalkenyl include 4,5-dihydro-1,2,3,4-oxadiazolyl, 2,3-dihydrofuryl, 2,3-dihydrothienyl, etc. In this specification, C1-C 10 Subheterocycloalkenyl refers to a divalent group having the same structure as the C1-C 10 heterocycloalkenyl.

[0399] In this specification, C6-C 60 Aryl refers to a monovalent group having a carbocyclic aromatic system with 6 to 60 carbon atoms, C6-C 60 Arylene refers to a divalent group having a carbocyclic aromatic system with 6 to 60 carbon atoms. The C6-C 60 Specific examples of the aryl include phenyl, bicyclopentadienyl, naphthyl, azulene, indacenyl, acenaphthylenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, yl, perylenyl, pentaphenyl, heptacenyl, tetracenyl, picenyl, hexaphenyl, pentaphenyl, rubicenyl, coronenyl, ovalenyl, etc. In the C6-C 60 aryl and C6-C 60 arylene, in the case where two or more rings are included, the two or more rings may be condensed with each other.

[0400] In this specification, C1-C 60 Heteroaryl refers to a monovalent group having a heteroaromatic system with 1 to 60 carbon atoms in which at least one heteroatom is included as a ring-forming atom in addition to carbon atoms, C1-C 60 Subheteroaryl refers to a divalent group having a heteroaromatic system with 1 to 60 carbon atoms in which at least one heteroatom is included as a ring-forming atom in addition to carbon atoms. The C1-C 60Specific examples of the heteroaryl group include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, benzoquinolinyl, isoquinolinyl, benzoisoquinolinyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, cinnolinyl, phenanthrolinyl, phthalazinyl, naphthyridinyl, etc. In the C1-C 60 heteroaryl group and C1-C 60 In the case where the heteroaryl group and C1-C heteroarylene group include two or more rings, the two or more rings may be condensed with each other.

[0401] In the present specification, the monovalent non-aromatic condensed polycyclic group means a monovalent group in which two or more rings are condensed with each other, and which includes only carbon atoms as ring-forming atoms and has non-aromaticity in the whole molecule (for example, having 8 to 60 carbon atoms). Specific examples of the monovalent non-aromatic condensed polycyclic group include indenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, indenophenanthrenyl, indenanthracenyl, etc. In the present specification, the divalent non-aromatic condensed polycyclic group means a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

[0402] In the present specification, the monovalent non-aromatic condensed heteropolycyclic group refers to a monovalent group in which two or more rings are condensed with each other, and which includes at least one heteroatom as a ring-forming atom in addition to carbon atoms and has non-aromaticity as a whole molecule (for example, having 1 to 60 carbon atoms). Specific examples of the monovalent non-aromatic condensed heteropolycyclic group include pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthylindolyl, isoindolyl, benzisoindolyl, naphthylisoindolyl, benzosilolyl, benzothienyl, benzofuryl, carbazolyl, dibenzosilolyl, dibenzothienyl, dibenzofuryl, azacarbazolyl, azafuryl, azadibenzosilolyl, azadibenzothienyl, azadibenzofuryl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, oxadiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, benzoxadiazolyl, benzothiadiazolyl, imidazopyridyl, imidazopyrimidinyl, imidazotriazinyl, imidazopyrazinyl, imidazopyridazinyl, indolocarbazolyl, indolocarbazolyl, benzofurocarbazolyl, benzothienocarbazolyl, benzosilolocarbazolyl, benzindolocarbazolyl, benzocarbazolyl, benzonaphthofuryl, benzonaphthothienyl, benzonaphthosilolyl, benzofurodibenzofuryl, benzofurodibenzothienyl, benzothienodibenzothienyl, etc. In the present specification, the divalent non-aromatic condensed heteropolycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group.

[0403] In the present specification, C6-C 60 aryloxy means -OA 102 (wherein A 102 is the C6-C 60 aryl), and the C6-C 60 arylthio means -SA 103 (wherein A 103 is the C6-C 60 aryl).

[0404] In the present specification, "C7-C 60 aralkyl" means -A 104 A 105 (wherein A 104 is C1-C 54 alkylene and A 105 is C6-C 59 aryl), and in the present specification, C2-C 60 heteroaralkyl means -A 106 A 107 (wherein A106 is a C1-C 59 alkylene group, A 107 is a C1-C 59 heteroaryl).

[0405] In this specification, "R 10a " may be:

[0406] deuterium (-D), -F, -Cl, -Br, -I, hydroxyl, cyano or nitro;

[0407] substituted or unsubstituted by deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 carbocyclic group, C1-C 60 heterocyclic group, C6-C 60 aryloxy, C6-C 60 arylthio, C7-C 60 aralkyl, C2-C 60 heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or any combination thereof, and is a substituted or unsubstituted C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl or C1-C 60 alkoxy;

[0408] substituted or unsubstituted by deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 60 carbocyclic group, C1-C 60 heterocyclic group, C6-C 60 aryloxy, C6-C 60 arylthio, C7-C 60 aralkyl, C2-C 60 heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q22 ), -B(Q 21 )(Q 22 ), -C(=O)(Q 21 ), -S(=O)2(Q 21 ), -P(=O)(Q 21 )(Q 22 ), or any combination thereof, substituted or unsubstituted C3-C 60 carbocyclic group, C1-C 60 heterocyclic group, C6-C 60 aryloxy, C6-C 60 arylthio, C7-C 60 aralkyl or C2-C 60 heteroaralkyl; or

[0409] -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)2(Q 31 ), or -P(=O)(Q 31 )(Q 32 ).

[0410] In this specification, Q1 to Q3, Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 can each independently be: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxy; cyano; nitro; C1-C 60 alkyl; C2-C 60 alkenyl; C2-C 60 alkynyl; C1-C 60 alkoxy; or

[0411] substituted or unsubstituted C3-C 60 carbocyclic group, C1-C 60 heterocyclic group, C7-C 60 aralkyl or C2-C 60 heteroaralkyl, substituted with deuterium, -F, cyano, C1-C 60 alkyl, C1-C 60 alkoxy, phenyl, biphenyl, or any combination thereof.

[0412] In this specification, a heteroatom refers to any atom other than a carbon atom. Examples of the heteroatom include O, S, N, P, Si, B, Ge, Se, or any combination thereof.

[0413] In this specification, the third-row transition metals include hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), etc.

[0414] In this specification, "Ph" refers to a phenyl group, "Me" refers to a methyl group, "Et" refers to an ethyl group, "tert-Bu" or "Bu t " refers to a tert-butyl group, and "OMe" refers to a methoxy group.

[0415] In this specification, "biphenyl" refers to "a phenyl group substituted by a phenyl group". The "biphenyl" belongs to the "substituted phenyl group" with a substituent of "C6-C 60 aryl".

[0416] In this specification, "terphenyl" refers to "a phenyl group substituted by a biphenyl group". The "terphenyl" belongs to the "substituted phenyl group" with a substituent of "a C6-C 60 aryl-substituted C6-C 60 aryl".

[0417] In the definition of the substituent, the maximum number of carbon atoms is exemplary. For example, the maximum number of carbon atoms in a C1-C 60 alkyl being 60 is exemplary, and the definition of the alkyl is equally applicable to a C1-C 20 alkyl. The same applies to other cases.

[0418] In this specification, unless otherwise defined, * and *' mean the bonding sites between adjacent atoms in the corresponding chemical formula.

[0419] [Examples]

[0420] Time-resolved photoluminescence analysis of exciplex host

[0421] Test Example 1

[0422] The compound HT-07 as the first host and the compound ET06 as the second host were co-deposited on a quartz substrate at a weight ratio of 5:5, thereby forming a film with a thickness.

[0423] Figure 5 is the photoluminescence spectrogram of the compound HT-07, the compound ET06, and their mixture. Refer to Figure 5The wavelength of the photoluminescence spectrum of the mixture of compound HT-07 and compound ET06 is shifted to longer wavelengths compared to the wavelengths of the photoluminescence spectra of compound HT-07 and compound ET06 individually. From this, it can be seen that an exciplex is formed by the mixing of compound HT-07 and compound ET06.

[0424] Regarding the thin film of Test Example 1 above, using a streak camera (Hamamatsu Corporation, N2 laser, 377 nm excitation wavelength, 465 nm emission wavelength), the photoluminescence intensities at different times were measured at 25 °C, 40 °C, and 60 °C respectively in the nanosecond time region, and are shown in Figure 6 . In Figure 6 , the photoluminescence that appears in the nanosecond time region corresponds to the prompt luminescence (i.e., fluorescence) of the exciplex host formed from the first host and the second host in response to the excitation light. From Figure 6 , the radiative rate constant of the lowest excited singlet state of the exciplex host can be obtained from the decay slope of the photoluminescence curve.

[0425] Referring to Figure 6 , the time-resolved photoluminescence decay curves of the thin film of Test Example 1 above overlap in the nanosecond time region and show the same decay slope for the prompt photoluminescence at the three temperatures. From this, it can be seen that the radiative rate constant of the exciton in the lowest excited singlet state of the exciplex host does not change with temperature, but is the same. The exciton in the lowest excited singlet state of the exciplex host can undergo intersystem crossing to the ground state by radiative decay and non-radiative decay as well as the lowest excited triplet state. Since the radiative rate constant of the exciton is constant with temperature, it can be inferred that the non-radiative rate constant and the intersystem crossing rate constant also do not change with temperature, but are constant.

[0426] Also, regarding the thin film of Test Example 1 above, using the method described above, the photoluminescence intensities at different times were measured at 25 °C, 40 °C, and 60 °C respectively in the microsecond time region, and are shown in Figure 7 . In Figure 7 , the photoluminescence that appears in the microsecond time region corresponds to the delayed fluorescence of the exciplex host formed from the first host and the second host in response to the excitation light. Such delayed fluorescence is generated from the exciton of the reverse intersystem crossing from the lowest excited triplet state to the lowest excited singlet state of the exciplex host.

[0427] Excitons in the lowest excited triplet state of the exciplex host can emit delayed fluorescence after nonradiative decay to the ground state or after reverse intersystem crossing to the lowest excited singlet state. Refer to Figure 7 the curve graph of, which shows that the decay slope of the delayed fluorescence increases with increasing temperature. The increase in the decay slope of the delayed fluorescence can indicate an increase in the decay rate of the delayed fluorescence, and it can be inferred from the increase in the decay rate of the delayed fluorescence that the reverse intersystem crossing of the excitons in the lowest excited triplet state will decrease and the nonradiative decay will increase.

[0428] For the thin film of Test Example 1 above, the measured photoluminescence quantum yield (PLQY) is shown in Table 1. The photoluminescence quantum yield shown in Table 1 is expressed as the sum of the quantum yields of ordinary fluorescence (prompt fluorescence) and delayed fluorescence.

[0429]

Table 1

[0430] Measured temperature PLQY (%) <![CDATA[Φ PF (%)]]> <![CDATA[Φ DF (%)]]> 25℃ 36.4 23.6 12.8 40℃ 34.5 23.6 10.9 60℃ 31.7 23.6 8.1

[0431] Referring to Table 1, it can be seen that the photoluminescence efficiency of the host thin film in Test Example 1 decreases with increasing temperature.

[0432] Measurement of triplet exciton lifetime of exciplex host

[0433] Test Example 2

[0434] Except for using compound HT-07 as the first host and compound ET05 as the second host, a thin film was formed using the same method as in Test Example 1.

[0435] Test Example 3

[0436] Except for using compound HT-07 as the first host and compound ET04 as the second host, a thin film was formed using the same method as in Test Example 1.

[0437] Test Example 4

[0438] Except for using compound HT-07 as the first host and compound ET02 as the second host, a thin film was formed using the same method as in Test Example 1.

[0439] For Test Examples 1 to 4 above, using the method described above, the time-resolved photoluminescence intensity was measured in the microsecond time region, and therefrom the exciton lifetime of the lowest excited triplet state of the exciplex host was calculated and shown in Table 2.

[0440] A short exciton lifetime of the lowest excited triplet state indicates a fast reverse intersystem crossing from T1 to S1, and a long exciton lifetime indicates a slow reverse intersystem crossing from T1 to S1.

[0441]

Table 2

[0442]

[0443] Manufacture of light-emitting element

[0444] Example 1

[0445] As the anode, 15Ω / cm 2 Corning's ITO glass substrate The glass substrate was cut into a size of 50 mm x 50 mm x 0.5 mm, ultrasonically cleaned with isopropyl alcohol and pure water for 10 minutes respectively, then irradiated with ultraviolet rays for 10 minutes, and cleaned by exposure to ozone, thereby setting the glass substrate in a vacuum deposition apparatus.

[0446] The compound m-MTDATA is vacuum deposited on the substrate to form a The hole injection layer is then coated with NPB. A hole transport layer is formed by vacuum deposition with a thickness of 1000 Å.

[0447] The host combination of the above-mentioned Experimental Example 1 (compound HT-07 as the first host, compound ET06 as the second host), compound 5 as the first dopant, and compound D-02 as the second dopant were co-deposited on the above-mentioned hole transport layer in a weight ratio of 65%:25%:10%:1%, thereby forming Thickness of the luminous layer.

[0448] Then, a film with a thickness of The ETL1 serves as an electron transport layer compound.

[0449] The thickness of the vacuum deposited layer on the electron transport layer is A cathode was formed by adding Al, thereby manufacturing a light-emitting element.

[0450] Comparative Example 1

[0451] A light-emitting element was manufactured in the same manner as in Example 1, except that the host combination of Experimental Example 2 was used as the first host and the second host of the light-emitting layer.

[0452] Comparative Example 2

[0453] A light-emitting element was manufactured in the same manner as in Example 1, except that the host combination of Experimental Example 3 was used as the first host and the second host of the light-emitting layer.

[0454] Comparative Example 3

[0455] A light-emitting element was fabricated in the same manner as in Example 1, except that the host combinations of Test Example 4 were used as the first host and the second host of the light-emitting layer.

[0456] For the light-emitting elements of Example 1 and Comparative Examples 1 to 3, the luminous efficiency (cd / A) and the lifetime (LT 95 ) were measured at 1000 nits using a Keithley MU236 and a luminance meter PR650. The results are shown in Table 3. For the lifetime (LT 95 ), the time required for the luminance to reach 95% of the initial luminance at 25 °C and 40 °C was measured, and it was expressed as a relative value (%) with respect to the lifetime (LT 95 ) of Example 1 at 25 °C.

[0457]

Table 3

[0458]

[0459] Referring to Table 3, at 25 °C and 40 °C, the lifetimes of the light-emitting elements of Example 1 were all superior to those of the light-emitting elements of Comparative Examples 1 to 3.

Claims

1. A light emitting element, comprising: anode; a cathode, opposite to the anode; as well as an intermediate layer, sandwiched between the anode and the cathode and comprising a light-emitting layer, The light-emitting layer includes a first main body, a second main body, a first dopant and a second dopant. The first host and the second host are combined with each other to form an exciplex host, The first dopant is a metal complex, The second dopant is a compound containing boron, The light emitting element satisfies the following conditions 1) to 3): 1)T1(HE)>T1(D1)>T1(D2); 2) k nr S The value is constant as the temperature increases from room temperature; 3) k nr T The value increases as the temperature rises from room temperature. Among them, in the conditions 1) to 3), T1(HE) is the lowest excited triplet energy level of the exciplex host, T1(D1) is the lowest excited triplet energy level of the first dopant, T1(D2) is the lowest excited triplet energy level of the second dopant, k nr S is the nonradiative rate constant of the lowest excited singlet state of the exciplex host, k nr T is the nonradiative rate constant for the lowest excited triplet state of the exciplex host.

2. The light-emitting element according to claim 1, wherein The exciplex host exhibits both transient and delayed fluorescence.

3. The light-emitting element according to claim 2, wherein: In the range from room temperature to 60° C., the decay curves of the time-resolved photoluminescence of the transient fluorescence overlap with each other.

4. The light-emitting element according to claim 2, wherein In the range from room temperature to 60° C., the higher the temperature, the faster the decay rate of the time-resolved photoluminescence of the delayed fluorescence.

5. The light-emitting element according to claim 1, wherein The first host is a hole-transporting host, and the second host is an electron-transporting host.

6. The light-emitting element according to claim 1, wherein The difference between the energy level of the highest occupied molecular orbital of the first host and the energy level of the highest occupied molecular orbital of the second host is greater than 0.2 eV.

7. The light-emitting element according to claim 1, wherein The difference between the energy level of the lowest unoccupied molecular orbital of the first host and the energy level of the lowest unoccupied molecular orbital of the second host is greater than 0.2 eV.

8. The light-emitting element according to claim 1, wherein The intermediate layer further includes: a hole transport region, which is arranged between the anode and the light-emitting layer and includes a hole injection layer, a hole transport layer, an electron blocking layer or any combination thereof.

9. The light-emitting element according to claim 1, wherein The intermediate layer further includes: an electron transport region, which is arranged between the cathode and the light-emitting layer and includes a hole blocking layer, an electron transport layer, an electron injection layer or any combination thereof.

10. The light emitting element according to claim 1, wherein The first host may include a compound represented by the following Chemical Formula 1: <Chemical Formula 1> In the chemical formula 1, R1, R2 and Ar1 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) and -P(=O)(Q1)(Q2), L1 is selected from substituted or unsubstituted C4-C 60 Carbocyclic groups and substituted or unsubstituted C1-C 60 Heterocyclic groups, a1 and a2 are independently integers from 1 to 4, b1 is an integer from 0 to 3, Selected from the substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 heteroaryl, substituted monovalent non-aromatic condensed polycyclic group, substituted monovalent non-aromatic condensed heteropolycyclic group, substituted C4-C 60 The carbocyclic group and the substituted C1-C 60 At least one substituent in the heterocyclic group is selected from: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 Alkoxy; is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 Alkoxy; C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 )以及-P(=O)(Q 31 )(Q 32 ), Q1 to Q3, Q 11 To the Q 13 Q 21 To the Q 23 And the Q 31 To the Q 33 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

11. The light emitting element according to claim 10, wherein Ar1 is a substituted or unsubstituted carbazolyl group.

12. The light emitting element according to claim 1, wherein The second host includes a compound represented by the following Chemical Formula 2: <Chemical Formula 2> In the chemical formula 2, Ar 11 To Ar 13 Referring to Ar1 in the chemical formula 1, L 11 To L 13 Referring to L1 in the chemical formula 1, b11 to b13 are integers of 0 to 3 independently of each other.

13. The light emitting element according to claim 12, wherein The Ar 11 To the Ar 13 At least one of the groups is a tritylphenyl group, a triphenylsilylphenyl group or an N-phenylcarbazolyl group.

14. The light emitting element according to claim 1, wherein The first dopant includes an organic metal compound represented by the following chemical formula 401: <Chemical Formula 401> M(L 401 ) xc1 (L 402 ) xc2 <Chemical Formula 402> In the chemical formula 401 and the chemical formula 402, M is titanium, cobalt, copper, zinc, zirconium, ruthenium, rhodium, palladium, rhenium, platinum, gold, osmium, iridium or rhenium, L 401 is a ligand represented by the chemical formula 402, xc1 is 1, 2 or 3, and when xc1 is 2 or more, two or more L 401 Same or different from each other, L 402 is an organic ligand, xc2 is 0, 1, 2, 3 or 4, and when xc2 is 2 or more, two or more L 402 Same or different from each other, X 401 and X 402 independently of one another are nitrogen or carbon, Ring A 401 and Ring A 402 Independently of each other, C3-C 60 Carbocyclic group or C1-C 60 Heterocyclic groups, T 401 is a single bond, -O-, -S-, -C(=O)-, -N(Q 411 )-、-C(Q 411 )(Q 412 )-、-C(Q 411 )=C(Q 412 )-、 -C(Q 411 )=or=C=, X 403 and X 404 Independently of each other, chemical bonds, O, S, N (Q 413 )、B(Q 413 )、P(Q 413 )、C(Q 413 )(Q 414 ) or Si(Q 413 )(Q 414 ), R 401 and R 402 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, 10a Substituted or unsubstituted C1-C 20 Alkyl, with at least one R 10a Substituted or unsubstituted C1-C 20 Alkoxy, with at least one R 10a Substituted or unsubstituted C3-C 60 A carbocyclic group, with at least one R 10a Substituted or unsubstituted C1-C 60 Heterocyclic group, -Si(Q 401 )(Q 402 )(Q 403 )、-N(Q 401 )(Q 402 )、-B(Q 401 )(Q 402 )、-C(=O)(Q 401 )、-S(=O)2(Q 401 ) or -P(=O)(Q 401 )(Q 402 ), Selectively, R 401 and R 402 can be connected to form a ring, The Q 411 To the Q 414 And the Q 401 To the Q 403 independently of each other are hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or deuterated, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl or any combination thereof substituted or unsubstituted C3-C 60 Carbocyclic group; C1-C 60 Heterocyclic group; C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl, xc11 and xc12 are independently an integer from 0 to 10, * and *' in the chemical formula 402 are binding sites with M in the chemical formula 401, respectively.

15. The light emitting element according to claim 14, wherein M is Pt.

16. The light emitting element according to claim 1, wherein The second dopant includes a compound represented by the following Chemical Formula 4: <Chemical Formula 4> In the chemical formula 4, Y1 to Y3 are independently O, S, N (R 24 )、B(R 24 )、C(R 24 )(R 25 ) or Si(R 24 )(R 25 ), C is 0 or 1, A 11 To A 13 are independently selected from C5-C 30 Carbocyclic groups and C1-C 30 Heterocyclic groups, R 21 To R 25 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) and -P(=O)(Q1)(Q2), and R 21 To R 25 Can selectively combine with each other to form substituted or unsubstituted C5-C 30 Carbocyclic groups and substituted or unsubstituted C1-C 30 Heterocyclic groups, a21 to a23 are independently selected from integers from 0 to 10, Selected from the substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 heteroaryl, substituted monovalent non-aromatic condensed polycyclic group, substituted monovalent non-aromatic condensed heteropolycyclic group, substituted C4-C 60 The carbocyclic group and the substituted C1-C 60 At least one substituent in the heterocyclic group is selected from: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 Alkoxy; is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 Alkoxy; C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 )以及-P(=O)(Q 31 )(Q 32 ), Q1 to Q3, Q 11 To the Q 13 Q 21 To the Q 23 And the Q 31 To the Q 33 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

17. An electronic device comprising: The light-emitting element according to claim 1.

18. The electronic device according to claim 17, further comprising: Thin Film Transistor, Wherein, the thin film transistor includes a source electrode and a drain electrode, The anode of the light emitting element is electrically connected to the source electrode or the drain electrode.

19. The electronic device according to claim 17, further comprising: Color filters, color conversion layers, touch screen layers, polarizing layers, or any combination thereof.

20. The electronic device according to claim 17, wherein: The electronic device is one of a flat panel display, a curved display, a computer monitor, a medical display, a television, a billboard, indoor or outdoor lighting and / or signaling, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a portable phone, a tablet computer, a tablet phone, a personal digital assistant, a wearable device, a notebook computer, a digital camera, a video camera, a viewfinder, a microdisplay, a 3D display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays spliced ​​together, a theater or stadium screen, a light therapy device, and a sign.

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