KR102287345B1 - Carbazole-based compound and organic light emitting device including the same - Google Patents

Abstract

A carbazole-based compound and an organic light-emitting device including the carbazole-based compound are provided.

Description

Carbazole-based compound and organic light emitting device including the same

A carbazole-based compound and an organic light emitting device including the same are provided.

An organic light emitting device is a self-luminous device, and has a wide viewing angle, excellent contrast, fast response time, excellent luminance, driving voltage and response speed characteristics, and multicolorization.

According to an example, the organic light emitting device may include an anode, a cathode, and an organic layer interposed between the anode and the cathode and including a light emitting layer. A hole transport region may be provided between the anode and the emission layer, and an electron transport region may be provided between the emission layer and the cathode. Holes injected from the anode move to the emission layer via the hole transport region, and electrons injected from the cathode move to the emission layer via the electron transport region. Carriers such as holes and electrons recombine in the emission layer to generate excitons. Light is generated as this exciton changes from an excited state to a ground state.

To provide a novel carbazole-based compound and an organic light emitting device employing the same.

According to one aspect, there is provided a carbazole-based compound represented by the following Chemical Formula 1:

<Formula 1>

In Formula 1,

X ₁ is O or S;

L _{1 To} L ₅ are each independently, a substituted or unsubstituted C ₁ -C ₆₀ alkylene group, a substituted or unsubstituted C ₂ -C ₆₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group , substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted A _{substituted or unsubstituted C 6} -C ₆₀ arylene group, a substituted or unsubstituted C ₂ -C ₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group (substituted or unsubstituted divalent non-aromatic condensed polycyclic group) and selected from a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;

a1 to a5 are each independently selected from an integer of 0 to 5;

R ₁ to R ₄ , R ₁₁ and R ₁₂ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group , hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphoric acid group or salt thereof, substituted or unsubstituted C ₁ -C ₆₀ alkyl group, substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, substituted or unsubstituted A substituted C ₂ -C ₆₀ alkynyl group, a substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, A substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ - C ₆₀ aryloxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or Among unsubstituted monovalent non-aromatic condensed heteropolycyclic groups, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) and -B(Q ₆ )(Q ₇ ) selected;

At least one of R ₂ to R ₄ is, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, or a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted a cyclic monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;

b1 to b4, b11, b12 and c1 are each independently selected from an integer of 1 to 4;

said substituted C ₁ -C ₆₀ alkylene group, substituted C ₂ -C ₆₀ alkenylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₂ -C ₁₀ heterocycloalkylene group, substituted C ₃ - C ₁₀ cycloalkenylene group, substituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₂ -C ₆₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic ring Group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C ₁ -C ₆₀ alkyl group, substituted C ₂ -C ₆₀ alkenyl group, substituted C ₂ -C ₆₀ alkynyl group, substituted C ₁ -C ₆₀ Alkoxy group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group, a substituted C ₆ -C ₆₀ arylthio group, a substituted C ₂ -C ₆₀ heteroaryl group, a substituted a non-aromatic condensed polycyclic group, And at least one substituent of the substituted monovalent non-aromatic condensed heteropolycyclic group is,

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ -C ₆₀ arylthio group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁₁ ) (Q ₁₂ ), -Si(Q ₁₃ )(Q ₁₄ )(Q _{15 ), C 1} -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, substituted with at least one of -B(Q ₁₆ )(Q _{17 )} , C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group;

C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl an oxy group, a C ₆ -C ₆₀ arylthio group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocyclo alkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₂₁ )(Q ₂₂ ), -Si(Q ₂₃ )(Q ₂₄ )(Q ₂₅ ) and -B(Q ₂₆ )(Q _{27 ), C 3} -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocyclo, substituted with at least one of -B(Q 26 )(Q 27 ). alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is non- -Aromatic heterocondensed polycyclic group; and

-N(Q ₃₁ )(Q ₃₂ ), -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) and -B(Q ₃₆ )(Q ₃₇ ); is selected from;

The Q ₁ to Q ₇ , Q ₁₁ to Q ₁₇ , Q ₂₁ to Q ₂₇ and Q ₃₁ to Q ₃₇ are each independently hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic condensed heteropolycyclic group.

According to another aspect, the first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode, including a light emitting layer, and including at least one type of carbazole-based compound represented by Chemical Formula 1;

Since the carbazole-based compound has excellent electrical properties and thermal stability, an organic light-emitting device employing the carbazole-based compound may have excellent power consumption, efficiency, luminance, and lifespan characteristics.

1 is a cross-sectional view schematically illustrating an organic light emitting diode according to an exemplary embodiment.
2 is a view showing an emission spectrum and a UV absorption spectrum of Compound 2.
3 is a view showing an emission spectrum and a UV absorption spectrum of Compound 3.

The carbazole-based compound is represented by the following Chemical Formula 1:

<Formula 1>

In Formula 1, X ₁ is O or S.

In Formula 1, L ₁ to L ₅ are each independently, a substituted or unsubstituted C ₁ -C ₆₀ alkylene group, a substituted or unsubstituted C ₂ -C ₆₀ alkenylene group, or a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group , a substituted or unsubstituted C ₆ -C ₆₀ arylene group, a substituted or unsubstituted C ₂ -C ₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group (substituted or unsubstituted divalent non-aromatic condensed) polycyclic group) and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group (substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group).

For example, in Formula 1, L ₁ to L ₅ are each independently

A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acetonitrile group Naphthylene group, fluorenylene group, spiro-fluorenylene group, phenalenylene group, phenanthrenylene group, anthracenylene group, fluoranthrenylene group (fluoranthrenylene), triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, perylenylene, pentaphenyl pentaphenylene, hexacenylene, pyrrolylene, imidazolylene, pyrazolylene, pyridinylene, pyrazinylene, pyrimidi Nylene group (pyrimidinylene), pyridazinylene group (pyridazinylene), isoindolylene group (isoindolylene), indolylene group (indolylene), indazolylene group (indazolylene), purinylene group (purinylene), quinolinylene group (quinolinylene) , isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene , cinnolinylene, carbazolylene, phenanthridinylen e), acridinylene group, phenanthrolinylene group, phenazinylene group, benzooxazolylene group, benzoimidazolylene group, furanylene group, Benzofuranylene group, thiophenylene group, benzothiophenylene group, thiazolylene group, isothiazolylene group, benzothiazolylene group, isoxazolylene group (isoxazolylene), oxazolylene group, triazolylene group, tetrazolylene group, oxadiazolylene group, triazinylene group, dibenzofuranylene group, dibenzothiophenylene group ), a benzocarbazolylene group, a dibenzocarbazolylene group, an imidazopyrimidinylene group, and an imidazopyridinylene group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, C ₆ -C ₂₀ aryl group, phenyl group-substituted phenyl group, C ₂ -C ₂₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group , a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, substituted with at least one of a monovalent non-aromatic condensed heteropolycyclic group and -Si(Q ₃₃ )(Q ₃₄ )(Q _{35 )} , heptalenylene group, indacenylene group, acenaphthylene group, fluorenylene group, spiro-fluorenylene group, phenalenylene group, phenanthrenylene group, anthracenylene group, fluoranthrenylene group, triphenylenylene group , pyrenylene group, chrysenylene group, naphthacenylene group, picenylene group, perylenylene group, pentaphenylene group, hexacenylene group, pyrrolylene group, imidazolylene group, pyrazolylene group, pyridinylene group, pyrazinylene group , pyrimidinylene group, pyridazinylene group, isoindolylene group, indolylene group, indazolylene group, purinylene group, quinolinylene group, isoquinolinylene group, benzoquinolinylene group, phthalazinylene group, Naphthyridinylene group, quinoxalinylene group, quinazolinylene group, cinolinylene group, carbazolylene group, phenanthridinylene group, acridinylene group, phenanthrolinylene group, phenazinylene group, benzoxazolylene group, benzoimi Dazolylene group, furanylene group, benzofuranylene group, thiophenylene group, benzothiophenylene group, thiazolylene group, isothiazolylene group, benzothiazolylene group, isoxazolylene group, oxazolylene group, triazolylene group, tetra a zolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, an imidazopyrimidinylene group, and an imidazopyridinylene group; is selected from

Q ₃₃ to Q ₃₅ are each independently hydrogen, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, carbazole Diary, benzocarbazolyl group, dibenzocarbazolyl group, pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group phthalazinyl group, quinoxalinyl group , it may be selected from a cinolinyl group and a quinazolinyl group.

According to one embodiment, L ₁ to L ₅ in Formula 1 may be each independently one of Formulas 2-1 to 2-37:

In Formulas 2-1 to 2-37,

Y ₁ is O, S, S(=O), S(=O) ₂ , C(Z ₃ )(Z ₄ ), N(Z ₅ ), or Si(Z ₆ )(Z ₇ );

Z _{1 To} Z ₇ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxyl group Acid group or salt thereof, sulfonic acid group or salt thereof, phosphoric acid group or salt thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, phenyl group-substituted phenyl group, naphthyl group, anthracenyl group, triphenylenyl group , pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, and -Si(Q ₃₃ )(Q ₃₄ )(Q ₄₅ );

wherein Q ₃₃ to Q ₄₅ are each independently hydrogen, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, carba Zolyl group, benzocarbazolyl group, dibenzocarbazolyl group, pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group phthalazinyl group, quinoxali selected from a nyl group, a cinolinyl group, and a quinazolinyl group;

d1 is selected from an integer from 1 to 4;

d2 is selected from an integer of 1 to 3;

d3 is selected from an integer of 1 to 6;

d4 is selected from an integer from 1 to 8;

d5 is 1 or 2;

d6 is selected from an integer from 1 to 5;

* is a binding site with a neighboring atom.

According to another embodiment, L ₁ to L ₅ in Formula 1 are each independently

Phenylene group, naphthylene group, phenanthrenylene group, anthracenylene group, triphenylenylene group, carbazolylene group, pyridinylene group, pyrimidinylene group, triazinylene group, quinazolinylene group, quinolinylene group, isoquinylene group a nolinylene group, a naphthyridinylene group and an oxadiazolylene group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a phenyl group-substituted phenyl group, a naphthyl group, an anthracenyl group, a triphenylenyl group, and a phenylene group substituted with at least one of a phenanthrenyl group , naphthylene group, phenanthrenylene group, anthracenylene group, triphenylenylene group, carbazolylene group, pyridinylene group, pyrimidinylene group, triazinylene group, quinazolinylene group, quinolinylene group, isoquinolinyl group a ren group, a naphthyridinylene group, and an oxadiazolylene group; may be selected from, but is not limited thereto.

According to another embodiment, L ₁ to L ₅ in Formula 1 may be each independently selected from Formula 3-1 to 3-33, but are not limited thereto:

In Formulas 3-1 to 3-33, * and *' independently represent bonding sites with neighboring atoms.

In Formula 1, a1 represents _{the number of L 1} , and may be 0, 1, 2, 3, 4, or 5, for example, 0, 1, or 2, and as another example, may be 0 or 1. When a1 is 0, L ₁ is a single bond. When a1 is 2 or more, two or more L ₁ may be the same as or different from each other. Descriptions of a2 to a5 may be understood with reference to the description of a1 and the structure of Formula 1.

According to one embodiment, a1 to a5 in Formula 1 may each independently be 0, 1 or 2, for example, 0 or 1, but is not limited thereto.

In Formula 1, R ₁ to R ₄ , R ₁₁ and R ₁₂ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group A group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group , substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, substituted or unsubstituted C ₂ -C ₁₀ Heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted a C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, a substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic ring group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) and -B(Q ₆ )( Q ₇ );

At least one of R ₂ to R ₄ is, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, or a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted It may be selected from a cyclic monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

For example, in Formula 1, R ₁ to R ₄ , R ₁₁ and R ₁₂ may each independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, An amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C ₁ -C ₂₀ alkyl group, a substituted or unsubstituted C ₁ - C ₂₀ alkoxy group, substituted or unsubstituted C ₆ -C ₂₀ aryl group, substituted or unsubstituted C ₂ -C ₂₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and substituted or unsubstituted selected from the monovalent non-aromatic condensed heteropolycyclic group;

At least one of R ₂ to R ₄ is, independently of each other, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent ratio -It may be selected from a condensed aromatic polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

According to one embodiment, in Formula 1, R ₁ to R ₄ , R ₁₁ and R ₁₂ are each independently

hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts;

A phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group ), fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group (phenalenyl), phenanthrenyl group (phenanthrenyl), anthracenyl group, fluoran Tenyl group (fluoranthenyl), triphenylenyl group (triphenylenyl), pyrenyl group (pyrenyl), chrysenyl group (chrysenyl), naphthacenyl group (naphthacenyl), picenyl group (picenyl), perylenyl group (perylenyl), penta phenyl group, hexacenyl group, pentacenyl group, rubicenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group ), furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl , pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, Purinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl , quinazolinyl group, cinnolinyl group, carbazolyl group ( carbazolyl), phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl (benzothiophenyl), isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl ), triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, imidazopyridinyl, imidazopyrimidinyl, pyrido a benzofuranyl group, a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante nyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group , isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, Carbazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group , triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, imidazopyridinyl group, imidazopyrimidinyl group and -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) substituted with at least one of a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a flu Orenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group , naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridi Nyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridi Nyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, carbazolyl group, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazole Diary, benzoxazolyl group, isobenzooxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group , imidazopyridinyl group, imidazopyrimidinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrimidobenzothiophenyl group; and

-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;

The Q ₃ to Q ₅ and Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, flu Orenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinyl group It may be selected from a nolinyl group, a quinazolinyl group, and a quinoxalinyl group.

According to another embodiment _{, at least one of R 2} to R ₄ in Formula 1 is, independently of each other,

Triphenylenyl group, carbazolyl group, pyrrolyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyri Dazinyl group, isoindoleyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cy Nolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzothiazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxa Diazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrimido benzothiophenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a triphenylenyl group, a carbazolyl group, a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group , pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group , naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzothiazolyl group, isobenzothiazolyl group, benzoxazolyl group, iso benzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; can be selected from

According to another embodiment _{, at least one of R 2} to R ₄ in Formula 1 is, independently of each other,

Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; may be selected from, but is not limited thereto.

According to another embodiment _{, at least one of R 2} to R ₄ in Formula 1 is each independently selected from the group consisting of:

thiophenyl group, furanyl group, carbazolyl group, acridinyl, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group and dibenzocarbazolyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group and a dibenzocarbazolyl group; can be selected from

According to another embodiment _{, at least one of R 2} to R ₄ in Formula 1 is each independently selected from the group consisting of:

phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, Phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, penta a cenyl group, a rubycenyl group, a coronenyl group and an ovalenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-flu Orenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group and ovalenyl group; can be selected from

According to another embodiment _{, at least one of R 2} to R ₄ in Formula 1 is, independently of each other,

Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; may be selected from, but is not limited thereto.

For example, in Formula 1, R ₁ to R ₄ , R ₁₁ and R ₁₂ are each independently

hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts;

Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5; and

-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;

Wherein Q _{3 To} Q ₅ are each independently, C ₁ -C ₂₀ Alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group,

At least one of R ₂ to R ₄ may be each independently selected from Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5, but is not limited thereto. :

In Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5,

Y ₃₁ is O, S, C(Z ₃₃ )(Z ₃₄ ), N(Z ₃₅ ) or Si(Z ₃₆ )(Z ₃₇ );

Z ₃₁ to Z ₃₇ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group an acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a C ₁ -C ₂₀ alkyl group-substituted phenyl group, a phenyl group-substituted phenyl group, Naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridi a nyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, and -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ );

wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group;

e2 is 1 or 2;

e3 is selected from an integer from 1 to 3;

e4 is selected from an integer from 1 to 4;

e5 is selected from an integer from 1 to 5;

e6 is selected from an integer from 1 to 6;

e7 is selected from an integer from 1 to 7;

* is a binding site with a neighboring atom.

In Formula 1, b1 represents _{the number of R 1} , and may be 1, 2, 3, or 4, for example, 1 or 2, or as another example, 1. When b1 is two or more, two or more R ₁ may be the same as or different from each other. The description of b2 to b4 may be understood with reference to the description of b1 and the structure of Formula 1.

According to one embodiment, b1 to b4 in Formula 1 may each independently be 1 or 2, for example, 1, but is not limited thereto.

In Formula 1, c1 represents the number of -[(L ₁ ) _a1 -(R ₁ ) _b1 ], and may be 1, 2, 3 or 4, for example, 1 or 2, or 1 as another example. When c1 is 2 or more, two or more -[(L ₁ ) _a1 -(R ₁ ) _b1 ] may be the same as or different from each other.

According to one embodiment, in Formula 1, c1 may be 1, a1 may be 0, and R ₁ may be hydrogen.

According to another embodiment, _{both R 11} and R ₁₂ in Formula 1 may be hydrogen.

According to another embodiment, in Formula 1, a1 is 0, c1, b11 and b12 are 1, and R ₁ , R ₁₁ and R ₁₂ are each independently hydrogen, deuterium, -F, -Cl, -Br , -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, It may be selected from a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and a triazinyl group, but is not limited thereto.

According to another embodiment, in Formula 1, a2 and a3 may be 0, and R ₂ and R ₃ may be hydrogen.

According to another embodiment, in Formula 1, a3 and a4 may be 0, and R ₃ and R ₄ may be hydrogen.

According to another embodiment, in Formula 1, a2 and a4 may be 0, and R ₂ and R ₄ may be hydrogen.

According to another embodiment, the carbazole-based compound may be represented by the following Chemical Formula 1A or 1B:

<Formula 1A>

<Formula 1B>

In Formula 1A _{, the descriptions of X 1} , L ₃ , L ₅ , a3, a5, b2, b3, R ₁₁ , R ₁₂ , b11 and b12 are the same as those described in claim 1,

R ₂ and R ₃ are a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted Cyclic C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensation It is selected from a polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

For example, in Formulas 1A and 1B,

L ₃ and L ₅ are independently of each other,

a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, and a carbazolylene group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a phenyl group-substituted phenyl group, a naphthyl group, an anthracenyl group, a triphenylenyl group, and a phenylene group substituted with at least one of a phenanthrenyl group , a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, and a carbazolylene group;

a3 and a5 are each independently 0, 1 or 2;

R ₁₁ and R ₁₂ are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxyl group an acid or a salt thereof, a sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group and a triazinyl group;

R ₂ and R ₃ are each independently selected from Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5,

b11 and b12 may be 1, but is not limited thereto.

According to another embodiment, _{both R 11} and R ₁₂ in Formulas 1A and 1B may be hydrogen, but the present invention is not limited thereto.

The carbazole-based compound represented by Formula 1 may be one of the following compounds 1 to 131, but is not limited thereto:

In the carbazole-based compound represented by Formula 1, 1) a “carbazole ring” is _{bonded to “carbon 3” of “ring A”, optionally with -(L 5} ) _a5 - interposed therebetween (the following formula 1'), 2) _{at least one of R 2} to R ₄ is, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, a substituted or Unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ Selected from a heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group (that is, at least one _{of R 2} to R _{4 in Formula 1 is} necessarily a "cyclic group"). Accordingly, the electron density of the “ring A” of Formula 1 can be effectively controlled, and the charge transport ability of the carbazole-based compound represented by Formula 1 can be easily controlled by controlling the substituents of _{R 2} to R _{4 .}

<Formula 1'>

_{For example, simulation evaluation results using Gaussian for HOMO, LUMO, T 1} energy level and S ₁ energy level for some of the compounds 1 to 131 and the following compounds A and B are shown in Table 1 below:

HOMO (eV) LUMO (eV) T ₁ (eV) S ₁ (eV) compound 1 -5.299 -1.649 2.857 3.231 compound 2 -5.369 -1.845 2.957 3.101 compound 3 -5.294 -1.694 2.936 3.23 compound 4 -5.501 -1.598 2.965 3.217 compound 7 -5.32 -1.800 2.860 2.95 compound 9 -5.297 -1.222 2.840 3.387 compound 10 -5.287 -1.904 2.53 3.018 compound 11 -5.504 -1.803 2.561 3.205 compound 12 -5.218 -1.748 2.806 2.941 compound 13 -5.185 -1.967 2.556 2.666 compound 16 -5.309 -1.878 2.812 2.913 compound 17 -5.224 -1.187 3.031 3.290 compound 18 -5.283 -1.224 2.988 3.255 compound 19 -5.336 -1.357 2.988 3.255 compound 22 -5.328 -1.924 3.004 3.089 compound 25 -5.31 -1.722 2.644 3.075 compound 27 -5.299 -1.709 2.747 3.052 compound 28 -5.377 -1.893 2.791 3.023 compound 29 -5.393 -1.916 2.82 3.079 compound 37 -5.353 -1.777 2.674 3.157 compound 38 -5.326 -1.686 2.699 3.156 compound 39 -5.255 -1.818 2.787 3.048 compound 40 -5.322 -1.730 2.808 3.122 compound 41 -5.377 -1.290 2.789 3.365 compound 124 -5.317 -1.730 2.911 3.007 compound 125 -5.241 -1.789 2.853 2.916

A method for synthesizing the carbazole-based compound represented by Chemical Formula 1 may be readily recognized by those skilled in the art with reference to Synthesis Examples to be described later.

Accordingly, the carbazole-based compound represented by Formula 1 may be suitable for use as a host of an organic layer of an organic light emitting device, for example, a light emitting layer among the organic layers. a second electrode; and an organic layer interposed between the first electrode and the second electrode, including a light emitting layer, and including at least one type of carbazole-based compound represented by Chemical Formula 1;

The organic light emitting device may have excellent power consumption, efficiency, luminance, and lifespan characteristics by having the organic layer including the carbazole-based compound represented by Chemical Formula 1 as described above.

The carbazole-based compound represented by Formula 1 may be used between a pair of electrodes of the organic light emitting diode. For example, the carbazole-based compound may include an emission layer, a hole transport region between the first electrode and the emission layer (eg, including at least one of a hole injection layer, a hole transport layer, and an electron blocking layer), and between the emission layer and the second electrode may be included in at least one of the electron transport region (eg, including at least one of a hole blocking layer, an electron transport layer, and an electron injection layer). For example, the carbazole-based compound represented by Formula 1 may be included in the emission layer. In this case, the emission layer may further include a dopant, and the carbazole-based compound included in the emission layer may serve as a host. The emission layer may be a green emission layer or a red emission layer emitting green light or red light, and the dopant may be a phosphorescent dopant.

In the present specification, "(organic layer) includes one or more carbazole-based compounds" means "(organic layer) includes one carbazole-based compound belonging to the category of Formula 1 or two different types belonging to the category of Formula 1 above." It may include the above carbazole-based compounds”.

For example, the organic layer may include only Compound 1 as the carbazole-based compound. In this case, the compound 1 may be present in the emission layer of the organic light emitting device. Alternatively, the organic layer may include Compound 1 and Compound 2 as the carbazole-based compound. In this case, the compound 1 and the compound 2 may be present in the same layer (for example, both the compound 1 and the compound 2 may be present in the emission layer) or may be present in different layers.

The first electrode is an anode that is a hole injection electrode and the second electrode is a cathode that is an electron injection electrode, or the first electrode is a cathode that is an electron injection electrode and the second electrode is a cathode that is a hole injection electrode.

For example, the first electrode is an anode, the second electrode is a cathode, and the organic layer is i) interposed between the first electrode and the light emitting layer, and is at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. a hole transport region comprising one; and ii) an electron transport region interposed between the emission layer and the second electrode and including at least one of a hole blocking layer, an electron transport layer, and an electron injection layer.

In the present specification, the term “organic layer” refers to a single and/or a plurality of layers interposed between the first electrode and the second electrode of the organic light emitting device. The "organic layer" may include not only an organic compound, but also an organometallic complex including a metal.

1 is a schematic cross-sectional view of an organic light emitting device 10 according to an embodiment of the present invention. Hereinafter, a structure and a manufacturing method of an organic light emitting device according to an embodiment of the present invention will be described with reference to FIG. 1 . The organic light emitting device 10 has a structure in which a first electrode 11 , an organic layer 15 , and a second electrode 19 are sequentially stacked.

A substrate may be additionally disposed below the first electrode 11 or above the second electrode 19 . As the substrate, a substrate used in a conventional organic light emitting device may be used, and a glass substrate or a transparent plastic substrate excellent in mechanical strength, thermal stability, transparency, surface smoothness, handling easiness and waterproofness may be used.

The first electrode 11 may be formed by, for example, providing a material for the first electrode on a substrate using a deposition method or a sputtering method. The first electrode 11 may be an anode. The material for the first electrode may be selected from materials having a high work function to facilitate hole injection. The first electrode 11 may be a reflective electrode, a transflective electrode, or a transmissive electrode. As a material for the first electrode, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO ₂ ), zinc oxide (ZnO), or the like may be used. Alternatively, a metal such as magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), or magnesium-silver (Mg-Ag) may be used. .

The first electrode 11 may have a single layer or a multilayer structure including two or more layers. For example, the first electrode 11 may have a three-layer structure of ITO/Ag/ITO, but is not limited thereto.

An organic layer 15 is disposed on the first electrode 11 .

The organic layer 15 may include a hole transport region; an emission layer; and an electron transport region.

The hole transport region may be disposed between the first electrode 11 and the emission layer.

The hole transport region may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, and a buffer layer.

The hole transport region may include only a hole injection layer or only a hole transport layer. Alternatively, the hole transport region may have a structure of a hole injection layer/hole transport layer or a hole injection layer/hole transport layer/electron blocking layer sequentially stacked from the first electrode 11 .

When the hole transport region includes the hole injection layer, the hole injection layer (HIL) may be formed on the first electrode 11 by using various methods such as vacuum deposition, spin coating, casting, LB, and the like. there is.

In the case of forming the hole injection layer by vacuum deposition, the deposition conditions vary depending on the compound used as the hole injection layer material, the structure and thermal characteristics of the target hole injection layer, etc., but for example, the deposition temperature of about 100 to about 500° C., a vacuum degree of about 10 ⁻⁸ to about 10 ⁻³ torr, and a deposition rate of about 0.01 to about 100 Å/sec may be selected, but not limited thereto.

In the case of forming the hole injection layer by spin coating, the coating conditions are different depending on the compound used as the hole injection layer material, the structure and thermal properties of the desired hole injection layer, but a coating speed of about 2000 rpm to about 5000 rpm, The heat treatment temperature for removing the solvent after coating may be selected from a temperature range of about 80° C. to 200° C., but is not limited thereto.

For the conditions for forming the hole transport layer and the electron blocking layer, refer to the conditions for forming the hole injection layer.

The hole transport region is, for example, m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, HMTPD, TCTA (4,4' ,4"-tris(N-carbazolyl)triphenylamine (4,4',4"-tris(N-carbazolyl)triphenylamine)), Pani/DBSA (Polyaniline/Dodecylbenzenesulfonic acid: polyaniline/dodecylbenzenesulfonic acid), PEDOT/PSS (Poly(3,4-ethylenedioxythiophene)/Poly(4-styrenesulfonate):poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)), Pani/CSA (Polyaniline/Camphor sulfonicacid) : polyaniline/camphorsulfonic acid), PANI/PSS (Polyaniline)/Poly(4-styrenesulfonate):polyaniline)/poly(4-styrenesulfonate)), a compound represented by the following Chemical Formula 201 and a compound represented by the following Chemical Formula 202 It may include at least one:

<Formula 201>

<Formula 202>

In Formula 201, Ar ₁₀₁ and Ar ₁₀₂ are each independently

Phenylene group, pentarenylene group, indenylene group, naphthylene group, azulenylene group, heptalenylene group, acenaphthylene group, fluorenylene group, phenarenylene group, phenanthrenylene group, anthracenylene group, fluoranthenyl a lene group, a triphenylenylene group, a pyrenylene group, a chrysenylenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, and a pentacenylene group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₃ -C ₁₀ cycloalke group, C ₂ -C ₁₀ heterocycloalkyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - A phenylene group, a pentarenylene group, an indenylene group, a naphthylene group, an azulenylene group, substituted with at least one of a _{C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed polycyclic group,} Heptalenylene group, acenaphthylene group, fluorenylene group, phenarenylene group, phenanthrenylene group, anthracenylene group, fluoranthenylene group, triphenylenylene group, pyrenylene group, chrysenylenylene group, naphthacenylene group, a picenylene group, a perylenylene group, and a pentacenylene group; can be selected from

In Formula 201, xa and xb may be each independently an integer of 0 to 5, or 0, 1, or 2. For example, xa may be 1 and xb may be 0, but is not limited thereto.

In Formulas 201 and 202, R ₁₀₁ to R ₁₀₈ , R ₁₁₁ to R ₁₁₉ and R ₁₂₁ to R ₁₂₄ are each independently

Hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof , a phosphoric acid group or a salt thereof, a C ₁ -C ₁₀ alkyl group (eg, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, etc.) and a C ₁ -C ₁₀ alkoxy group (eg, a methoxy group, ethoxy group, propoxy group, butoxy group, pentoxy group, etc.);

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, and a phosphoric acid group _{or a C 1} -C ₁₀ alkyl group and a C ₁ -C ₁₀ alkoxy group substituted with one or more salts thereof;

a phenyl group, a naphthyl group, an anthracenyl group, a fluorenyl group and a pyrenyl group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a phenyl group, a naphthyl group, an anthracenyl group, a fluorenyl group and a pyrenyl group, substituted with one or more of a _{C 1} -C ₁₀ alkyl group and a C ₁ -C _{10 alkoxy group;} may be selected from, but is not limited thereto.

In Formula 201, R ₁₀₉ is,

a phenyl group, a naphthyl group, an anthracenyl group, and a pyridinyl group; and

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a phenyl group, a naphthyl group, an anthracenyl group and a pyridinyl group substituted with one or more of a _{C 1} -C ₂₀ alkyl group and a C ₁ -C _{20 alkoxy group;} can be selected from

According to one embodiment, the compound represented by Formula 201 may be represented by Formula 201A, but is not limited thereto:

<Formula 201A>

_{For a detailed description of R 101} , R ₁₁₁ , R ₁₁₂ and R ₁₀₉ in Formula 201A, refer to the above description.

For example, the compound represented by Formula 201 and the compound represented by Formula 202 may include the following compounds HT1 to HT20, but are not limited thereto:

The hole transport region may have a thickness of about 100 Å to about 10000 Å, for example, about 100 Å to about 1000 Å. If the hole transport region includes both a hole injection layer and a hole transport layer, the thickness of the hole injection layer is about 100 Å to about 10000 Å, for example, about 100 Å to about 1000 Å, and the thickness of the hole transport layer is about 50 Å to about 2000 Angstroms, for example about 100 Angstroms to about 1500 Angstroms. When the thickness of the hole transport region, the hole injection layer, and the hole transport layer satisfies the above-described ranges, satisfactory hole transport characteristics may be obtained without a substantial increase in driving voltage.

The hole transport region may further include a charge-generating material to improve conductivity in addition to the above-described material. The charge-generating material may be uniformly or non-uniformly dispersed in the hole transport region.

The charge-generating material may be, for example, a p-dopant. The p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto. For example, non-limiting examples of the p-dopant include tetracyanoquinonedimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane quinone derivatives such as phosphorus (F4-TCNQ) and the like; metal oxides such as tungsten oxide and molybdenum oxide; and a cyano group-containing compound such as the following compound HT-D1, but is not limited thereto.

<Compound HT-D1> <F4-TCNQ>

The hole transport region may further include a buffer layer.

The buffer layer may serve to increase efficiency by compensating for an optical resonance distance according to a wavelength of light emitted from the light emitting layer.

The emission layer EML may be formed on the hole transport region by using a method such as a vacuum deposition method, a spin coating method, a casting method, or an LB method. In the case of forming the light emitting layer by vacuum deposition or spin coating, the deposition conditions and coating conditions vary depending on the compound used, but in general, they may be selected from within the same range of conditions as those for forming the hole injection layer.

When the organic light emitting device is a full color organic light emitting device, the light emitting layer may be patterned into a red light emitting layer, a green light emitting layer, and a blue light emitting layer. Alternatively, the light emitting layer has a structure in which a red light emitting layer, a green light emitting layer, and/or a blue light emitting layer are stacked, so that various modifications are possible, such as emitting white light.

The emission layer may include a carbazole-based compound represented by Formula 1 above. The light emitting layer may further include a dopant. The dopant may include at least one of a phosphorescent dopant and a fluorescent dopant.

The light emitting layer includes a host and a dopant, but the host may include at least one of the carbazole-based compounds represented by Formula 1 above.

According to one embodiment, the light emitting layer includes a first host and a second host,

The first host and the second host are different from each other,

The carbazole-based compound represented by Formula 1 is included in the light emitting layer,

The first host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is, independently of each other,

Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; selected from among, including a carbazole-based compound,

The second host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is, independently of each other,

Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; comprising a carbazole-based compound selected from among;

wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group.

For example, the light emitting layer includes a first host and a second host,

The first host and the second host are different from each other,

The carbazole-based compound represented by Formula 1 is included in the light emitting layer,

The first host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is, independently of each other, a carbazole type represented by one of Formulas 4-1 to 4-48. comprising a compound,

The second host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is each independently selected from Formulas 5-1 to 5-6 and 6-1 to 6 It may include a carbazole-based compound represented by one of -5.

By including the first host and the second host as described above in the light emitting layer, a balance of hole and electron transport into the light emitting layer is effectively achieved, so that the efficiency, luminance and lifespan of the organic light emitting device can be improved.

On the other hand, according to another embodiment, the light emitting layer comprises a host 1 and a host 2,

The host 1 and the host 2 are different from each other,

The carbazole-based compound represented by Formula 1 is included in the light emitting layer,

The host 1 includes a carbazole-based compound represented by Formula 1;

The host 2 may include at least one of a first compound represented by the following Chemical Formula 41 and a second compound represented by the following Chemical Formula 61:

<Formula 41>

<Formula 61>

<Formula 61A> <Formula 61B>

of the formulas

X ₄₁ is N-[(L ₄₂ ) _a42 -(R ₄₂ ) _b42 ], S, O, S(=O), S(=O) ₂ , C(=O), C(R ₄₃ )(R ₄₄ ), Si(R ₄₃ )(R ₄₄ ), P(R ₄₃ ), P(=O)(R ₄₃ ) or C=N(R ₄₃ );

Ring A ₆₁ in Formula 61 is represented by Formula 61A;

_{Ring A 62} in Formula 61 is represented by Formula 61B;

X ₆₁ is N-[(L ₆₂ ) _a62 -(R ₆₂ ) _b62 ], S, O, S(=O), S(=O) ₂ , C(=O), C(R ₆₃ )(R ₆₄ ), Si(R ₆₃ )(R ₆₄ ), P(R ₆₃ ), P(=O)(R ₆₃ ) or C=N(R ₆₃ );

X ₇₁ is C(R ₇₁ ) or N, X ₇₂ is C(R ₇₂ ) or N, X ₇₃ is C(R ₇₃ ) or N, X ₇₄ is C(R ₇₄ ) or N, and X ₇₅ is C(R ₇₅ ) or N, X ₇₆ is C(R ₇₆ ) or N, X ₇₇ is C(R ₇₇ ) or N, and X ₇₈ is C(R ₇₈ ) or N;

Ar ₄₁ , L ₄₁ , L ₄₂ , L ₆₁ and L ₆₂ are each independently, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkylene group, a substituted or Unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ arylene group, substituted or unsubstituted C ₂ - a C ₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;

n1 and n2 are each independently selected from an integer of 0 to 3;

a41, a42, a61 and a62 are each independently selected from an integer of 0 to 3;

R ₄₁ to R ₄₄ , R ₅₁ to R ₅₄ , R ₆₁ to R ₆₄ and R ₇₁ to R ₇₉ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group , nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, substituted or unsubstituted substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ Aryl group, substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted Condensed monovalent non-aromatic polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) and -B(Q ₆ )(Q ₇ );

b41, b42, b51 to b54, b61, b62 and b79 are each independently selected from an integer of 1 to 3;

said substituted C ₁ -C ₆₀ alkylene group, substituted C ₂ -C ₆₀ alkenylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₂ -C ₁₀ heterocycloalkylene group, substituted C ₃ - C ₁₀ cycloalkenylene group, substituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₂ -C ₆₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic ring Group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C ₁ -C ₆₀ alkyl group, substituted C ₂ -C ₆₀ alkenyl group, substituted C ₂ -C ₆₀ alkynyl group, substituted C ₁ -C ₆₀ Alkoxy group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group, a substituted C ₆ -C ₆₀ arylthio group, a substituted C ₂ -C ₆₀ heteroaryl group, a substituted a non-aromatic condensed polycyclic group, And at least one substituent of the substituted monovalent non-aromatic condensed heteropolycyclic group is,

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ -C ₆₀ arylthio group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁₁ ) (Q ₁₂ ), -Si(Q ₁₃ )(Q ₁₄ )(Q _{15 ), C 1} -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, substituted with at least one of -B(Q ₁₆ )(Q _{17 )} , C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group;

C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl an oxy group, a C ₆ -C ₆₀ arylthio group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocyclo alkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₂₁ )(Q ₂₂ ), -Si(Q ₂₃ )(Q ₂₄ )(Q ₂₅ ) and -B(Q ₂₆ )(Q _{27 ), C 3} -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocyclo, substituted with at least one of -B(Q 26 )(Q 27 ). alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is non- -Aromatic heterocondensed polycyclic group; and

-N(Q ₃₁ )(Q ₃₂ ), -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) and -B(Q ₃₆ )(Q ₃₇ ); is selected from;

The Q ₁ to Q ₇ , Q ₁₁ to Q ₁₇ , Q ₂₁ to Q ₂₇ and Q ₃₁ to Q ₃₇ are each independently hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic condensed heteropolycyclic group.

According to one embodiment, the R ₄₁ to R ₄₄ , R ₅₁ to R ₅₄ , R ₆₁ to R ₆₄ and R ₇₁ to R ₇₉ are each independently

hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts;

Phenyl group, phenyl group-substituted phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, Dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group , hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group , isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindoleyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, carbazolyl group, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzofuranyl group, benzo Thiophenyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazole phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, ace Naphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group , chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubysenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imine Dazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindoleyl group, indolyl group, indazole group Diary, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group , quinazolinyl group, cinolinyl group, carbazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, imida a zopyridinyl group and an imidazopyrimidinyl group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ), phenyl group, phenyl group-substituted phenyl group, pentalenyl group, indenyl group, naphthyl group , azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group , fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group, Ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, Pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, Sinolinyl group, carbazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, benzoxazolyl group, iso Benzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, imidazopyridinyl group and imida phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzo Fluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, peryl group nyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group , isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, Carbazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group , triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, imidazopyridinyl group and imidazopyrimidinyl group ; and

-Si(Q ₃ )(Q ₄ )(Q ₅ ); is selected from;

The Q ₃ to Q ₅ and Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, flu Orenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinyl group It may be selected from a nolinyl group, a quinazolinyl group, and a quinoxalinyl group, but is not limited thereto.

For example, the first compound may be represented by one of the following Chemical Formulas 41-1 to 41-12, and the second compound may be represented by one of the following Chemical Formulas 61-1 to 61-6:

In Formulas 41-1 to 41-12 and 61-1 to 61-6, X ₄₁ , X ₆₁ , L ₄₁ , L ₄₂ , a41 , a42 , L ₆₁ , L ₆₂ , a61 , a62 , R ₄₁ to R ₄₄ , For descriptions of b41, b42, R ₆₁ to R ₆₄ , b61, b62, R ₇₁ to R ₇₉ and b79, refer to the description herein.

_{For example, at least one of R 2} to R ₄ of the carbazole-based compound represented by Formula 1 contained in Host 1 is each independently selected from the group consisting of:

Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; is selected from

When the first compound represented by Formula 41 is included in _{Host 2, at least one of R 41} , R ₄₂ and R ₅₂ of the first compound, and when the second compound represented by Formula 61 is included in Host 2 At least one _{of R 61} and R ₆₂ of the second compound is each independently

Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; can be selected from

wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group Or it may be a quinoxalinyl group.

_{As another example, at least one of R 2} to R ₄ of the carbazole-based compound represented by Formula 1 included in Host 1 is each independently selected from the group consisting of:

Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; can be selected from

When the first compound represented by Formula 41 is included in _{Host 2, at least one of R 41} , R ₄₂ and R ₅₂ of the first compound, and when the second compound represented by Formula 61 is included in Host 2 At least one _{of R 61} and R ₆₂ of the second compound is each independently

pyrrolyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindoleyl group, indole group Diary, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, phenanthridinyl group, phenanthroline nyl, phenazinyl, benzoimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, and imidazopyrimidinyl group; and

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, Quinazolinyl group, cinolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxa a diazolyl group, a triazinyl group, an imidazopyridinyl group and an imidazopyrimidinyl group; is selected from

wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group.

_{As another example, at least one of R 2} to R ₄ of the carbazole-based compound represented by Formula 1 included in Host 1 is, independently of each other, represented by one of Formulas 4-1 to 4-48,

When the first compound represented by Formula 41 is included in _{Host 2, at least one of R 41} , R ₄₂ and R ₅₂ of the first compound, and when the second compound represented by Formula 61 is included in Host 2 _{At least one of R 61} and R ₆₂ of the second compound may be each independently represented by one of Formulas 5-1 to 5-6 and 6-1 to 6-5.

_{As another example, at least one of R 2} to R ₄ of the carbazole-based compound represented by Formula 1 included in Host 1 is each independently selected from Formulas 5-1 to 5-6 and 6-1 to 6 represented by one of -5,

When the first compound represented by Formula 41 is included in _{Host 2, at least one of R 41} , R ₄₂ and R ₅₂ of the first compound, and when the second compound represented by Formula 61 is included in Host 2 _{At least one of R 61} and R ₆₂ of the second compound may be each independently represented by one of Formulas 4-1 to 4-48.

According to one embodiment, the first compound represented by Formula 41 may include one of the following compounds A1 to A83, and the second compound represented by Formula 61 may include one of the following compounds B1 to B20, It is not limited to:

For example, the emission layer may include one of the compounds 1 to 131 as the host 1 and one of the compounds A1 to A83 and B1 to B20 as the host 2, but is not limited thereto.

When both the host 1 and the host 2 are included in the light emitting layer, the balance of hole and electron injection into the light emitting layer can be effectively controlled, so that an organic light emitting device having improved light emitting efficiency and lifespan can be realized.

The weight ratio of the first host and the second host in the light emitting layer and the weight ratio of the host 1 and the host 2 in the light emitting layer are each independently in the range of 1:99 to 99:1, for example, 10:90 to 90:10. may be selected within the range. When the weight ratio range of the first host and the second host and the weight ratio range of the host 1 and the host 2 satisfy the above description, the hole and electron injection balance into the emission layer may be effectively controlled.

A dopant in the emission layer may include a phosphorescent dopant that emits light according to a fluorescence emission mechanism or a phosphorescent dopant that emits light according to a phosphorescence emission mechanism.

According to one embodiment, the dopant in the emission layer may be a phosphorescent dopant, and the phosphorescent dopant may include an organometallic compound represented by the following Chemical Formula 81:

<Formula 81>

In Formula 81,

M is iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) or thorium (Tm);

Y ₁ to Y ₄ are each independently carbon (C) or nitrogen (N);

Y ₁ and Y ₂ are connected through a single bond or a double bond, Y ₃ and Y ₄ are connected through a single bond or a double bond;

CY ₁ and CY ₂ are independently of each other, benzene, naphthalene, fluorene, spiro-fluorene, indene, pyrrole, thiophene, furan, imidazole, pyrazole, thiazole, isothiazole, oxazole , isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, quinoline, isoquinoline, benzoquinoline, quinoxaline, quinazoline, carbazole, benzoimidazole, benzofuran, benzothiophene, isobenzo Thiophene, benzoxazole, isobenzoxazole, triazole, tetrazole, oxadiazole, triazine, dibenzofuran or dibenzothiophene, CY ₁ and CY ₂ are optionally (optionally); linked to each other via a single bond or an organic linking group;

R ₈₁ and R ₈₂ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group Acid or salt thereof, sulfonic acid or salt thereof, phosphoric acid or salt thereof, -SF ₅ , substituted or unsubstituted C ₁ -C ₆₀ alkyl group, substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted A substituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl Oxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted a monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) or -B(Q ₆ )(Q ₇ );

a81 and a82 are each independently selected from an integer of 1 to 5;

n81 is an integer from 0 to 4;

n82 is 1, 2 or 3;

L ₈₁ is a monovalent organic ligand, a divalent organic ligand, or a trivalent organic ligand.

For the description of R ₈₁ and R ₈₂ , refer to the description _{of R 41 in the present specification.}

The phosphorescent dopant may include at least one of the following compounds PD1 to PD78, but is not limited thereto:

Alternatively, the phosphorescent dopant may include the following PtOEP:

The fluorescent dopant may include at least one of the following DPAVBi, BDAVBi, TBPe, DCM, DCJTB, Coumarin 6 and C545T.

When the light emitting layer includes a host and a dopant, the content of the dopant may be generally selected from about 0.01 to about 20 parts by weight based on about 100 parts by weight of the host, but is not limited thereto.

The light emitting layer may have a thickness of about 100 Å to about 1000 Å, for example, about 200 Å to about 600 Å. When the thickness of the light emitting layer satisfies the above range, excellent light emitting characteristics may be exhibited without a substantial increase in driving voltage.

Next, an electron transport region is disposed on the emission layer.

The electron transport region may include at least one of a hole blocking layer, an electron transport layer, and an electron injection layer.

For example, the electron transport region may have a structure of a hole blocking layer/electron transport layer/electron injection layer or an electron transport layer/electron injection layer, but is not limited thereto. The electron transport layer may have a single layer or a multilayer structure including two or more different materials.

For the formation conditions of the hole blocking layer, the electron transport layer, and the electron injection layer in the electron transport region, refer to the formation conditions of the hole injection layer.

When the electron transport region includes a hole blocking layer, the hole blocking layer may include, for example, at least one of BCP and Bphen, but is not limited thereto.

The hole blocking layer may have a thickness of about 20 Å to about 1000 Å, for example, about 30 Å to about 300 Å. When the thickness of the hole blocking layer satisfies the above range, excellent hole blocking characteristics can be obtained without a substantial increase in driving voltage.

The electron transport layer may further include at least one of BCP, Bphen, and Alq ₃ , Balq, TAZ, and NTAZ.

Alternatively, the electron transport layer may include at least one of the following compounds ET1 and ET2, but is not limited thereto.

The electron transport layer may have a thickness of about 100 Å to about 1000 Å, for example, about 150 Å to about 500 Å. When the thickness of the electron transport layer satisfies the above range, a satisfactory electron transport characteristic may be obtained without a substantial increase in driving voltage.

The electron transport layer may further include a metal-containing material in addition to the above-described material.

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

In addition, the electron transport region may include an electron injection layer EIL that facilitates injection of electrons from the second electrode 19 .

The electron injection layer may include at least one selected from LiF, NaCl, CsF, Li _{2 O, and BaO.}

The electron injection layer may have a thickness of about 1 Å to about 100 Å, and about 3 Å to about 90 Å. When the thickness of the electron injection layer satisfies the above range, a satisfactory level of electron injection characteristics may be obtained without a substantial increase in driving voltage.

A second electrode 19 is provided on the organic layer 15 . The second electrode 19 may be a cathode. As the material for the second electrode 19 , a metal, an alloy, an electrically conductive compound, or a combination thereof having a relatively low work function may be used. Specific examples include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), etc. It can be used as a material for forming the second electrode 19 . Alternatively, various modifications are possible, such as forming the transmissive second electrode 19 using ITO or IZO in order to obtain a top light emitting device.

In the above, the organic light emitting device has been described with reference to FIG. 1, but is not limited thereto.

In the present specification, the C ₁ -C ₆₀ alkyl group means a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples thereof include a methyl group, an ethyl group, a propyl group, an isobutyl group, and a sec-butyl group. , ter-butyl group, pentyl group, iso-amyl group, hexyl group, and the like are included. In the present specification, the C ₁ -C ₆₀ alkylene group refers to a divalent group having the same structure as _{the C 1} -C _{60 alkyl group.}

In the present specification, the C ₁ -C ₆₀ alkoxy group refers to a _{monovalent group having the formula of -OA 101} (here, A _{101 is the C 1} -C ₆₀ alkyl group), and specific examples thereof include a methoxy group, an ethoxy group, isopropyloxy group and the like.

In the present specification, the C ₂ -C ₆₀ alkenyl group _{has a structure including one or more carbon double bonds in the middle or at the terminal of the C 2} -C ₆₀ alkyl group, and specific examples thereof include an ethenyl group, a propenyl group, a butenyl group, and the like. do. In the present specification, the C ₂ -C ₆₀ alkenylene group refers to a divalent group having the same structure as _{the C 2} -C _{60 alkenyl group.}

In the present specification, the C ₂ -C ₆₀ alkynyl group has a structure including one or more carbon triple bonds in the middle or at the terminal of _{the C 2} -C _{60 alkyl group, and specific examples thereof include an ethynyl group, a propynyl group (propynyl)} , etc. are included. In the present specification, the C ₂ -C ₆₀ alkynylene group refers to a divalent group having the same structure as the C ₂ -C _{60 alkynyl group.}

In the present specification, the C ₃ -C ₁₀ cycloalkyl group refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclohep group. til groups, and the like. The C ₃ -C ₁₀ cycloalkylene group of the specification and the second having the same structure as the above C ₃ -C ₁₀ cycloalkyl group means a group.

In the present specification, the C ₂ -C ₁₀ heterocycloalkyl group refers to a monovalent monocyclic group having 2 to 10 carbon atoms including at least one hetero atom selected from N, O, P and S as a ring-forming atom, and a specific Examples include a tetrahydrofuranyl group, a tetrahydrothiophenyl group, and the like. In the present specification, the C ₂ -C ₁₀ heterocycloalkylene group refers to a divalent group having the same structure as the C ₂ -C _{10 heterocycloalkyl group.}

In the present specification, the C ₃ -C ₁₀ cycloalkenyl group is a monovalent monocyclic group having 3 to 10 carbon atoms, and refers to a group having at least one double bond in the ring, but not having aromaticity, and a specific Examples include a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, and the like. In the present specification, the C ₃ -C ₁₀ cycloalkenylene group refers to a divalent group having the same structure as the C ₃ -C _{10 cycloalkenyl group.}

In the present specification, the C ₂ -C ₁₀ heterocycloalkenyl group is a monovalent monocyclic group having 2 to 10 carbon atoms including at least one hetero atom selected from N, O, P and S as a ring-forming atom, and at least in the ring. has one double bond. Specific examples of the C ₂ -C ₁₀ heterocycloalkenyl group include a 2,3-hydrofuranyl group, a 2,3-hydrothiophenyl group, and the like. In the present specification, the C ₂ -C ₁₀ heterocycloalkenylene group refers to a divalent group having the same structure as the C ₂ -C _{10 heterocycloalkenyl group.}

In the specification C ₆ -C ₆₀ aryl group is a monovalent (monovalent) group, and means, C ₆ -C ₆₀ arylene group of 6 to 60 carbon atoms having a cyclic carbonyl of 6 to 60 carbon atoms, an aromatic carbonyl system It refers to a divalent group having a cyclic aromatic system. Specific examples of the C ₆ -C ₆₀ aryl group include a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. When the C ₆ -C ₆₀ aryl group and the C ₆ -C ₆₀ arylene group include two or more rings, the two or more rings may be fused to each other.

In the present specification, the C ₂ -C ₆₀ heteroaryl group refers to a monovalent group including at least one hetero atom selected from N, O, P and S as a ring-forming atom and having a carbocyclic aromatic system having 2 to 60 carbon atoms. and C ₂ -C ₆₀ heteroarylene group means a divalent group including at least one hetero atom selected from N, O, P and S as a ring-forming atom and having a carbocyclic aromatic system having 2 to 60 carbon atoms do. Specific examples of the C ₂ -C ₆₀ heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, and the like. When the C ₂ -C ₆₀ heteroaryl group and the C ₂ -C ₆₀ heteroarylene group include two or more rings, the two or more rings may be fused to each other.

In the specification C ₆ -C ₆₀ aryloxy group -OA, point ₁₀₂ (where, A ₁₀₂ is the C ₆ -C ₆₀ aryl group), a C ₆ -C ₆₀ arylthio group (arylthio) is -SA ₁₀₃ (where , A ₁₀₃ represents the above C ₆ -C ₆₀ aryl group).

In the present specification, the monovalent non-aromatic condensed polycyclic group includes two or more rings condensed with each other and contains only carbon as a ring-forming atom (eg, may have 8 to 60 carbon atoms). and a monovalent group in which the entire molecule has non-aromaticity. Specific examples of the non-aromatic condensed polycyclic group include a fluorenyl group and the like. In the present specification, the divalent non-aromatic condensed polycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

In the present specification, in the monovalent non-aromatic condensed heteropolycyclic group, two or more rings are condensed with each other, and carbon as a ring-forming atom (eg, carbon number may be 2 to 60) in addition to It refers to a monovalent group including a hetero atom selected from N, O, P and S, and having non-aromaticity in the entire molecule. The monovalent non-aromatic condensed heteropolycyclic group includes a carbazolyl group and the like. In the present specification, the condensed divalent non-aromatic heteropolycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group.

In the present specification, the substituted C ₁ -C ₆₀ alkylene group, substituted C ₂ -C ₆₀ alkenylene group, substituted C ₂ -C ₆₀ alkynylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₂ -C ₁₀ heterocycloalkylene group, substituted C ₃ -C ₁₀ cycloalkenylene group, substituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₂ -C ₆₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C ₁ -C ₆₀ alkyl group, substituted C ₂ -C ₆₀ alkenyl group, substituted C ₂ -C ₆₀ alkynyl group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₂ -C ₁₀ heterocycloalkenyl group , substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group, a substituted C ₆ -C ₆₀ arylthio group, a substituted C ₂ -C ₆₀ heteroaryl group, a substituted monovalent non- At least one substituent of the condensed aromatic polycyclic group and the substituted monovalent non-aromatic condensed heteropolycyclic group is,

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ -C ₆₀ arylthio group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁₁ ) (Q ₁₂ ), -Si(Q ₁₃ )(Q ₁₄ )(Q _{15 ), C 1} -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, substituted with at least one of -B(Q ₁₆ )(Q _{17 )} , C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group;

C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl an oxy group, a C ₆ -C ₆₀ arylthio group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocyclo alkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₂₁ )(Q ₂₂ ), -Si(Q ₂₃ )(Q ₂₄ )(Q ₂₅ ) and -B(Q ₂₆ )(Q _{27 ), C 3} -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocyclo, substituted with at least one of -B(Q 26 )(Q 27 ). alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is non- -Aromatic heterocondensed polycyclic group; and

-N(Q ₃₁ )(Q ₃₂ ), -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) and -B(Q ₃₆ )(Q ₃₇ ); can be selected from

In addition, in the present specification, Q ₁ to Q ₇ , Q ₁₁ to Q ₁₇ and Q ₃₁ to Q ₃₇ are each independently hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkyl nyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C _{It may be selected from a 60} aryl group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

In the present specification, "phenyl group-substituted phenyl group" means "a phenyl group substituted with at least one phenyl group".

In the present specification, "C ₁ -C ₂₀ alkyl group-substituted phenyl group" means "a phenyl group substituted with at least one C ₁ -C ₂₀ alkyl group".

Hereinafter, a compound and an organic light emitting device according to an embodiment of the present invention will be described in more detail with reference to Synthesis Examples and Examples, but the present invention is not limited to the following Synthesis Examples and Examples. In the following Synthesis Example, in the expression "'B' was used instead of 'A'", the amount of 'B' and the amount of 'A' used are the same on a molar equivalent basis.

[Example]

Synthesis Example 1: Synthesis of compound 2

Synthesis of Intermediate A

In a 1L round-bottom flask, 3-amino-2-methoxydibenzofuran (11.1 g, 52 mmol) was dissolved in Et ₂ O (130 mL), and then BF ₃ ㅇEt ₂ O (26.4 mL, 208 mmol) was added at -20°C under 5 It was added dropwise slowly over a minute. To the resulting mixture, a mixture of tert- Butyl nitrile (21.7 mL, 64 mL) in Et ₂ O (64 mL) was slowly added for 30 minutes, stirred for 30 minutes, and then Et ₂ O (300 mL) After adding, stirred for 10 minutes under 0 ℃. After concentrating the reaction product obtained therefrom, a solution of NaI (9.4 g, 62.4 mmol) and I ₂ (1.2 g, 4.7 mmol) in dry CH ₃ CN (340 mL) was slowly added dropwise at room temperature and stirred for 1 hour. Then, 20% aqueous solution of Na ₂ S ₂ O ₃ (200 mL) was added and stirred, and the organic layer obtained by adding chloroform (300 mL X 3) was dried over MgSO ₄ , and the residue obtained by evaporating the solvent was applied to silica gel. Separation and purification by column chromatography gave Intermediate A (12.1 g, yield 72%). The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₁₃ H ₁₁ NO ₂ (M ⁺ ) 213.

Synthesis of Intermediate B

Intermediate A (8.92 g, 27.5 mmol), carbazole (5.06 g, 30.3 mmol), CuI (0.52 g, 2.75 mmol), K ₃ PO ₄ (8.76 g, 41.3 mmol), (w)-trans -1,2- After mixing cyclohexanediamine (74 g L, 0.07 mmol) with 1,4-dioxane (140 mL), the temperature was raised to 110° C. under nitrogen, stirred under reflux for 48 hours, cooled to room temperature, and 200 mL of water and Extracted with methylene chloride 200 mL. The obtained organic layer _{was dried over MgSO 4} , and the residue obtained by evaporating the solvent was separated and purified by silica gel column chromatography to obtain Intermediate B (3.5 g, 35%). The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₂₅ H ₁₇ NO ₂ (M ⁺ ) 363.

Synthesis of Intermediate C

To a mixture of Intermediate B (3.64 g, 10.0 mmol) in methylene chloride (100 mL) under nitrogen condition, boron tribromide (15.0 mL, 15.0 mmol; 1.0 M in dichloromethane) was slowly added dropwise over 10 minutes at 0 ° C. , and stirred at 0 °C for 10 hours. Then, 30 mL of water was added to the mixture under a temperature of 0° C. and stirred, and the organic layer obtained by adding methylene chloride (60 mL X 3) was _{dried using MgSO 4} , and the solvent was evaporated to obtain an intermediate C.

Synthesis of Intermediate D

Intermediate C and triethylamine (12.8 mL, 91.6 mmol) were mixed in methylene chloride (100 mL) under nitrogen condition, and then trifruoromethansulfonic anhydride (5.14 mL, 30.5 mmol) was slowly added dropwise at 0 ° C. temperature for 7 hours at 0 ° C. stirred in. Then, 15 mL of 1.0 M aqueous HCl was added to the mixture under a temperature of 0° C. and stirred, and the organic layer obtained by adding methylene chloride (60 mL X 3) was _{dried using MgSO 4} , and the residue obtained by evaporating the solvent was placed on silica gel. Separation and purification by column chromatography gave Intermediate D (3.2 g, 65%). The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₂₅ H ₁₄ F ₃ NO ₄ S (M ⁺ ) 481.

Synthesis of compound 2

Intermediate D (7.0 g, 14.5 mmol), 2,4-diphenyl-6-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1,3 ,5-triazine (6.31 g, 14.5 mmol), Pd(Pph ₃ ) ₄ (0.84 g, 0.725 mmol), K ₂ CO ₃ (5.01 g, 36.3 mmol) was mixed with 50 mL of THF and 25 mL of distilled water. The temperature was raised to 80 °C and stirred for 18 hours under reflux. After cooling the resulting mixture to room temperature, the resulting solid was filtered and the obtained solid was dissolved in toluene, _{dried using MgSO 4} , the solvent was removed, and the obtained residue was recrystallized from Toluene:MeO to obtain Compound 2 (6.25). g, 67%) was obtained. The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₄₅ H ₂₈ N ₄ O (M ⁺ ) 640.

Synthesis Example 2: Synthesis of compound 3

Instead of 2,4-diphenyl-6-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1,3,5-triazine, 4,6- Except that diphenyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)pyrimidine (6.17 g, 14.5 mmol) was used, Compound 3 (8.5 g, 91%) was obtained by using the same method as for the synthesis of Compound 2 of Synthesis Example 1. The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₄₅ H ₂₈ N ₄ O (M ⁺ ) 639.

Synthesis Example 3: Synthesis of compound 27

Intermediate D (7.88 g, 16.4 mmol), 9-(quinolin-5-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole ( 8.95 g, 21.3 mmol), Pd(Pph ₃ ) ₄ (0.94 g, 0.82 mmol), K ₂ CO ₃ (5.66 g, 40.9 mmol) A mixture of 100 mL of THF and 50 mL of distilled water was heated to 80 ℃, and The mixture was stirred at reflux for 18 hours. After cooling the mixture obtained therefrom to room temperature, 100 mL of distilled water was added to the mixture, stirred, and the organic layer obtained by adding methylene chloride (150 mL X 3) was _{dried using MgSO 4} and the solvent was removed and the residue obtained Compound 27 (7.57 g, 74 %) was obtained by separation and purification by silica gel column chromatography. The resulting compound was confirmed by LC-MS.

LC-MS ( m/z ) = C ₄₅ H ₂₈ N ₄ O (M ⁺ ) 625.

Evaluation Example 1: HOMO, LUMO and triplet (T1) energy level evaluation

The HOMO, LUMO, and T1 energy levels of compounds 2, 3 and 27 were evaluated according to the method of Table 2, and the results are shown in Table 3.

How to evaluate HOMO energy levels Cyclic voltammetry (CV) (electrolyte: 0.1 M Bu ₄ NClO ₄ / solvent: CH ₂ Cl ₂ / electrode: three-electrode system (working electrode: GC, reference electrode: Ag/AgCl, auxiliary electrode: Pt)) After obtaining the potential (V)-current (A) graph of each compound, the HOMO energy level of each compound is calculated from the reduction onset of the graph How to evaluate LUMO energy levels Each compound _{was diluted in CHCl 3} to a concentration of 1x10 ^-5 M, and after measuring the UV absorption spectrum at room temperature using a Shimadzu UV-350 Spectrometer, the edge of the absorption spectrum Calculate the LUMO energy level using the optical band gap (Eg) from T1 Energy Level Assessment Method A mixture of toluene and each compound (1mg of each compound is dissolved in 3cc of toluene) is put in a quartz cell, placed in liquid nitrogen (77K), and the photoluminescence spectrum is measured using a photoluminescence measuring instrument, and the photoluminescence spectrum is measured at normal room temperature. The T1 energy level is calculated by analyzing only the peaks observed only at low temperature compared to the luminescence spectrum.

Compound No. HOMO (eV)
(actual value) LUMO (eV)
(actual value) T1 energy level (eV) 2 -5.72 -2.15 2.70 3 -5.69 -2.15 2.65 27 -5.56 -2.21 2.54

From Table 3, it can be seen that the compounds have electrical properties suitable for use as a material for an organic light emitting device.

evaluation example 2: Thermal property evaluation

Thermal analysis using TGA (Thermo Gravimetric Analysis) and DSC (Differential Scanning Calorimetry) for the compounds 2, 3 and 27 (N ₂ atmosphere, temperature section: room temperature to 800° C. (10° C./min) - TGA, at room temperature -DSC, Pan Type: Pt Pan in Disposable Al Pan (TGA) , Disposable Al pan (DSC)) were performed up to 400 ° C. The results are summarized in Table 4. According to Table 4, it can be confirmed that the compounds have excellent thermal stability.

Compound No. Tg(℃) Tm(℃) Tc(℃) Td(1%/5%,°C) 2 144.4 309.8 n/a 389/418 3 139.8 289.6 n/a 387/419 27 155.3 N/A N/A 379/414

evaluation example 3: Emission spectrum evaluation

By evaluating the UV absorption spectrum and PL (photoluminescence) spectrum of Compound 2, the luminescence properties of each polymer were evaluated. First, Compound 2 was diluted to a concentration of 0.2 mM in toluene, and the UV absorption spectrum was measured using a Shimadzu UV-350 Spectrometer. This was repeated for compounds 3 and 27.

On the other hand, compound 2 was diluted in toluene to a concentration of 10 mM, using an ISC PC1 spectrofluorometer equipped with a Xenon lamp, PL (Photoluminecscence) spectrum was measured (@ 298K). This was repeated for compounds 3 and 27.

The PL spectrum and UV absorption spectrum of Compound 2 are shown in FIG. 2, the PL spectrum and UV absorption spectrum of Compound 3 are shown in FIG. 3, and the maximum wavelength and half-width ratio (FWHM) of each spectrum are shown in Table 5 below. arranged in

UV absorption spectrum PL spectrum Compound No. λmax λmax FWHM 2 323 nm 425 nm 67 nm 3 322 nm 383 nm 70 nm 27 328 nm 413 nm 54 nm

2 and 3 and Table 5, it can be seen that the compounds 3, 2 and 27 have excellent light emitting properties.

Example One

A glass substrate on which an indium tin oxide (ITO) electrode (first electrode, anode) having a thickness of 1500 Å was formed was washed with distilled water and ultrasonic waves. After washing with distilled water, ultrasonic cleaning is performed with a solvent such as isopropyl alcohol, acetone, methanol, etc., dried, transferred to a plasma cleaner, and then the substrate is cleaned using oxygen plasma for 5 minutes and then transferred to a vacuum laminating machine.

The compound NPB was vacuum-deposited on the ITO electrode of the glass substrate to form a hole transport layer having a thickness of 1000 Å, thereby forming a hole transport region.

Compound 2 (host) and Ir(ppy) ₃ (dopant (compound PD1 in the present specification, 10 wt%) were co-deposited on the hole transport region to form a 300 Å-thick emission layer.

BAlq was vacuum deposited on the light emitting layer to form a first electron transport layer having a thickness of 50 Å, and Alq ₃ was vacuum deposited on the first electron transport layer to form a second electron transport layer having a thickness of 250 Å, and then the second electron transport layer An organic light emitting device was manufactured by depositing LiF on the layer to form an electron injection layer having a thickness of 5 Å, and forming an Al second electrode (cathode) having a thickness of 1000 Å on the electron injection layer.

Example 2

An organic light emitting diode was manufactured in the same manner as in Example 1, except that Compound 3 was used instead of Compound 2 as a host when the emission layer was formed.

Example 3

An organic light emitting diode was manufactured in the same manner as in Example 1, except that Compound 27 was used instead of Compound 2 as a host when the emission layer was formed.

Example 4

The organic light emitting device using the same method as in Example 1, except that the thickness of the hole transport layer was changed to 1350 Å, and _{Compound 27 and PtOEP were respectively used instead of Compound 2 and Ir(ppy) 3 when forming the emission layer.} was produced.

Comparative Example 1

An organic light emitting diode was manufactured in the same manner as in Example 1, except that Compound A was used instead of Compound 2 as a host when the emission layer was formed.

<Compound A>

Comparative Example 2

An organic light emitting diode was manufactured in the same manner as in Example 1, except that Compound B was used instead of Compound 2 as a host when the emission layer was formed.

<Compound B>

Comparative Example 3

An organic light emitting device using the same method as in Example 1, except that the thickness of the hole transport layer was changed to 1350 Å, and _{Compound A and PtOEP were used instead of Compound 2 and Ir(ppy) 3 when forming the light emitting layer, respectively.} was produced.

Comparative Example 4

An organic light emitting diode using the same method as in Example 1, except that the thickness of the hole transport layer was changed to 1350 Å, and _{Compound B and PtOEP were used instead of Compound 2 and Ir(ppy) 3 when forming the light emitting layer, respectively.} was produced.

Comparative Example 5

An organic light emitting device was manufactured in the same manner as in Example 1, except that CBP was used instead of Compound 2 when forming the light emitting layer.

Comparative Example 6

An organic light emitting device was manufactured using the same method as in Example 1, except that the thickness of the hole transport layer was changed to 1350 Å, and _{CBP and PtOEP were used instead of Compound 2 and Ir(ppy) 3 when forming the light emitting layer, respectively.} produced.

Evaluation Example 4: Characterization of an organic light emitting device

Power consumption, luminance, efficiency, emission color and lifespan of each of the organic light emitting devices manufactured in Examples 1 to 4 and Comparative Examples 1 to 6 were evaluated using Kethley SMU 236 and a luminance meter PR650, and the results are shown in Table 6 shown in The lifetime LT ₉₇ is a measure of the time (hr) it takes for the luminance to reach 9% after driving when the initial luminance is 100%. The lifetime of the green OLED (LT ₉₇ ) was evaluated under the condition of 6000 nits, and the lifetime of the red OLED (LT ₉₇ ) was evaluated under the condition of 1500 nits.

EML Power Consumption
(lm/W) luminance
(cd/m2) efficiency
(cd/A) luminous color LT ₉₇ (hr) host dopant Example 1 compound 2 Ir(ppy) ₃ 28.2 4755 48.5 green 90 Example 2 compound 3 Ir(ppy) ₃ 28.3 4865 49.6 green 88 Example 3 compound 27 Ir(ppy) ₃ 25.3 4715 47.5 green 84 Example 4 compound 27 PtOEP 10.9 2435 24.0 Red 95 Comparative Example 1 compound A Ir(ppy) ₃ 23.9 4815 48.0 green 72 Comparative Example 2 compound B Ir(ppy) ₃ 22.6 4690 47.5 green 74 Comparative Example 3 compound A PtOEP 10.3 2365 23.0 Red 85 Comparative Example 4 compound B PtOEP 9.95 2270 22.5 Red 88 Comparative Example 5 CBP Ir(ppy) ₃ 22.0 4,766 47.7 green 61 Comparative Example 6 CBP PtOEP 22.1 2.212 22.1 Red 89

From Table 6, the organic light emitting devices of Examples 1 to 3 have superior power consumption, luminance, efficiency and lifespan characteristics compared to the organic light emitting devices of Comparative Examples 1, 2, and 5, and the organic light emitting device of Example 4 is It can be seen that the organic light emitting devices of Comparative Examples 3, 4 and 6 have superior power consumption, luminance, efficiency, and lifespan characteristics.

10: organic light emitting device
11: first electrode
15: organic layer
19: second electrode

Claims (20)

A carbazole-based compound represented by the following formula (1):
<Formula 1>

In Formula 1,
X ₁ is O or S;
L ₁ is a substituted or unsubstituted C ₁ -C ₆₀ alkylene group, a substituted or unsubstituted C ₂ -C ₆₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted a C ₂ -C ₁₀ heterocycloalkylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, and a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group;
L _{2 To} L ₅ are each independently, a substituted or unsubstituted C ₁ -C ₆₀ alkylene group, a substituted or unsubstituted C ₂ -C ₆₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group , substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted A _{substituted or unsubstituted C 6} -C ₆₀ arylene group, a substituted or unsubstituted C ₂ -C ₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group (substituted or unsubstituted divalent non-aromatic condensed polycyclic group) and selected from a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;
a1 to a5 are each independently selected from an integer of 0 to 5;
R ₁ is hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group Or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, a substituted or unsubstituted A substituted C ₁ -C ₆₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group , substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, —N(Q ₁ ) (Q ₂ ), —Si(Q ₃ )(Q ₄ )(Q ₅ ) and —B(Q ₆ )(Q ₇ );
R ₂ to R ₄ , R ₁₁ and R ₁₂ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group , hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphoric acid group or salt thereof, substituted or unsubstituted C ₁ -C ₆₀ alkyl group, substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, substituted or unsubstituted A substituted C ₂ -C ₆₀ alkynyl group, a substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, A substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ - C ₆₀ aryloxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or Among the unsubstituted monovalent non-aromatic condensed heteropolycyclic groups, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) and -B(Q ₆ )(Q ₇ ) selected;
At least one of R ₂ to R ₄ is, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, or a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted a cyclic monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;
b1 to b4, b11, b12 and c1 are each independently selected from an integer of 1 to 4;
said substituted C ₁ -C ₆₀ alkylene group, substituted C ₂ -C ₆₀ alkenylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₂ -C ₁₀ heterocycloalkylene group, substituted C ₃ - C ₁₀ cycloalkenylene group, substituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₂ -C ₆₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic ring Group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C ₁ -C ₆₀ alkyl group, substituted C ₂ -C ₆₀ alkenyl group, substituted C ₂ -C ₆₀ alkynyl group, substituted C ₁ -C ₆₀ Alkoxy group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group, a substituted C ₆ -C ₆₀ arylthio group, a substituted C ₂ -C ₆₀ heteroaryl group, a substituted a non-aromatic condensed polycyclic group, And at least one substituent of the substituted monovalent non-aromatic condensed heteropolycyclic group is,
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ -C ₆₀ arylthio group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁₁ ) (Q ₁₂ ), -Si(Q ₁₃ )(Q ₁₄ )(Q _{15 ), C 1} -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, substituted with at least one of -B(Q ₁₆ )(Q _{17 )} , C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group;
C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl an oxy group, a C ₆ -C ₆₀ arylthio group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocyclo alkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₂₁ )(Q ₂₂ ), -Si(Q ₂₃ )(Q ₂₄ )(Q ₂₅ ) and -B(Q ₂₆ )(Q _{27 ), C 3} -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocyclo, substituted with at least one of -B(Q 26 )(Q 27 ). alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is non- -Aromatic heterocondensed polycyclic group; and
-N(Q ₃₁ )(Q ₃₂ ), -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) and -B(Q ₃₆ )(Q ₃₇ ); is selected from;
The Q ₁ to Q ₇ , Q ₁₁ to Q ₁₇ , Q ₂₁ to Q ₂₇ and Q ₃₁ to Q ₃₇ are each independently hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic condensed heteropolycyclic group. According to claim 1,
The L ₂ to L ₅ are each independently,
A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acetonitrile group Naphthylene group, fluorenylene group, spiro-fluorenylene group, phenalenylene group, phenanthrenylene group, anthracenylene group, fluoranthrenylene group (fluoranthrenylene), triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, perylenylene, pentaphenyl pentaphenylene, hexacenylene, pyrrolylene, imidazolylene, pyrazolylene, pyridinylene, pyrazinylene, pyrimidi Nylene group (pyrimidinylene), pyridazinylene group (pyridazinylene), isoindolylene group (isoindolylene), indolylene group (indolylene), indazolylene group (indazolylene), purinylene group (purinylene), quinolinylene group (quinolinylene) , isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene , cinnolinylene, carbazolylene, phenanthridinylen e), acridinylene group, phenanthrolinylene group, phenazinylene group, benzooxazolylene group, benzoimidazolylene group, furanylene group, Benzofuranylene group, thiophenylene group, benzothiophenylene group, thiazolylene group, isothiazolylene group, benzothiazolylene group, isoxazolylene group (isoxazolylene), oxazolylene group, triazolylene group, tetrazolylene group, oxadiazolylene group, triazinylene group, dibenzofuranylene group, dibenzothiophenylene group ), a benzocarbazolylene group, a dibenzocarbazolylene group, an imidazopyrimidinylene group, and an imidazopyridinylene group; and
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, C ₆ -C ₂₀ aryl group, phenyl group-substituted phenyl group, C ₂ -C ₂₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group , a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, substituted with at least one of a monovalent non-aromatic condensed heteropolycyclic group and -Si(Q ₃₃ )(Q ₃₄ )(Q _{35 )} , heptalenylene group, indacenylene group, acenaphthylene group, fluorenylene group, spiro-fluorenylene group, phenalenylene group, phenanthrenylene group, anthracenylene group, fluoranthrenylene group, triphenylenylene group , pyrenylene group, chrysenylene group, naphthacenylene group, picenylene group, perylenylene group, pentaphenylene group, hexacenylene group, pyrrolylene group, imidazolylene group, pyrazolylene group, pyridinylene group, pyrazinylene group , pyrimidinylene group, pyridazinylene group, isoindolylene group, indolylene group, indazolylene group, purinylene group, quinolinylene group, isoquinolinylene group, benzoquinolinylene group, phthalazinylene group, Naphthyridinylene group, quinoxalinylene group, quinazolinylene group, cinolinylene group, carbazolylene group, phenanthridinylene group, acridinylene group, phenanthrolinylene group, phenazinylene group, benzoxazolylene group, benzoimi Dazolylene group, furanylene group, benzofuranylene group, thiophenylene group, benzothiophenylene group, thiazolylene group, isothiazolylene group, benzothiazolylene group, isoxazolylene group, oxazolylene group, triazolylene group, tetra a zolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, an imidazopyrimidinylene group, and an imidazopyridinylene group; is selected from
Q ₃₃ to Q ₃₅ are each independently hydrogen, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, carbazole Diary, benzocarbazolyl group, dibenzocarbazolyl group, pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group phthalazinyl group, quinoxalinyl group , a carbazole-based compound selected from a cinolinyl group and a quinazolinyl group. According to claim 1,
Wherein L _{2 To} L _{5 Are} each independently of one another, one of Formulas 2-1 to 2-37, a carbazole-based compound:

In Formulas 2-1 to 2-37,
Y ₁ is O, S, S(=O), S(=O) ₂ , C(Z ₃ )(Z ₄ ), N(Z ₅ ), or Si(Z ₆ )(Z ₇ );
Z _{1 To} Z ₇ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxyl group Acid group or salt thereof, sulfonic acid group or salt thereof, phosphoric acid group or salt thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, phenyl group-substituted phenyl group, naphthyl group, anthracenyl group, triphenylenyl group , pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, and -Si(Q ₃₃ )(Q ₃₄ )(Q ₄₅ );
wherein Q ₃₃ to Q ₄₅ are each independently hydrogen, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, carba Zolyl group, benzocarbazolyl group, dibenzocarbazolyl group, pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group phthalazinyl group, quinoxali selected from a nyl group, a cinolinyl group, and a quinazolinyl group;
d1 is selected from an integer from 1 to 4;
d2 is selected from an integer of 1 to 3;
d3 is selected from an integer of 1 to 6;
d4 is selected from an integer from 1 to 8;
d5 is 1 or 2;
d6 is selected from an integer from 1 to 5;
* is a binding site with a neighboring atom. According to claim 1,
The L ₂ to L ₅ are each independently,
Phenylene group, naphthylene group, phenanthrenylene group, anthracenylene group, triphenylenylene group, carbazolylene group, pyridinylene group, pyrimidinylene group, triazinylene group, quinazolinylene group, quinolinylene group, isoquinylene group a nolinylene group, a naphthyridinylene group and an oxadiazolylene group; and
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a phenyl group-substituted phenyl group, a naphthyl group, an anthracenyl group, a triphenylenyl group, and a phenylene group substituted with at least one of a phenanthrenyl group , naphthylene group, phenanthrenylene group, anthracenylene group, triphenylenylene group, carbazolylene group, pyridinylene group, pyrimidinylene group, triazinylene group, quinazolinylene group, quinolinylene group, isoquinolinyl group a ren group, a naphthyridinylene group, and an oxadiazolylene group; selected from among, a carbazole-based compound. According to claim 1,
wherein a1 to a5 are each independently 0, 1 or 2, a carbazole-based compound. According to claim 1,
Wherein R ₁ is hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C ₁ -C ₂₀ alkyl group, and a substituted or unsubstituted C ₁ -C ₂₀ alkoxy group;
The R ₂ to R ₄ , R ₁₁ and R ₁₂ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C ₁ -C ₂₀ alkyl group, a substituted or unsubstituted C ₁ -C ₂₀ alkoxy group, a substituted or Unsubstituted C ₆ -C ₂₀ aryl group, substituted or unsubstituted C ₂ -C ₂₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and substituted and unsubstituted monovalent non-aromatic hetero selected from the condensed polycyclic group;
At least one of R ₂ to R ₄ is, independently of each other, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent ratio - A carbazole-based compound selected from a condensed aromatic polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group. According to claim 1,
Wherein R ₁ is hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts; and
-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;
The R ₂ to R ₄ , R ₁₁ and R ₁₂ are each independently
hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts;
A phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group ), fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group (phenalenyl), phenanthrenyl group (phenanthrenyl), anthracenyl group, fluoran Tenyl group (fluoranthenyl), triphenylenyl group (triphenylenyl), pyrenyl group (pyrenyl), chrysenyl group (chrysenyl), naphthacenyl group (naphthacenyl), picenyl group (picenyl), perylenyl group (perylenyl), penta phenyl group, hexacenyl group, pentacenyl group, rubicenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group ), furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl , pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, Purinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl , quinazolinyl group, cinnolinyl group, carbazolyl group ( carbazolyl), phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl (benzothiophenyl), isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl ), triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, imidazopyridinyl, imidazopyrimidinyl, pyrido a benzofuranyl group, a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group;
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante nyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group, rubycenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group , isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, Carbazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group , triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, imidazopyridinyl group, imidazopyrimidinyl group and -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) substituted with at least one of a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a flu Orenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group , naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group, ovalenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridi Nyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridi Nyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, carbazolyl group, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazole Diary, benzoxazolyl group, isobenzooxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group , an imidazopyridinyl group, an imidazopyrimidinyl group, a pyridobenzofuranyl group, a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; and
-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;
The Q ₃ to Q ₅ and Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, flu Orenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinyl group A carbazole-based compound selected from a nolinyl group, a quinazolinyl group and a quinoxalinyl group. According to claim 1,
At least one of R ₂ to R ₄ is, independently of each other,
Triphenylenyl group, carbazolyl group, pyrrolyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyri Dazinyl group, isoindoleyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cy Nolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzothiazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxa Diazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrimido benzothiophenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a triphenylenyl group, a carbazolyl group, a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group , pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group , naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, benzothiazolyl group, isobenzothiazolyl group, benzoxazolyl group, iso benzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; selected from among, a carbazole-based compound. According to claim 1,
At least one of R ₂ to R ₄ is, independently of each other,
Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; selected from among, a carbazole-based compound. According to claim 1,
At least one of R ₂ to R ₄ is, independently of each other,
Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; selected from among, a carbazole-based compound. According to claim 1,
Wherein R ₁ is,
hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts; and
-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;
The R ₂ to R ₄ , R ₁₁ and R ₁₂ are each independently
hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof and phosphoric acid or _{a C 1} -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group substituted with at least one of its salts;
Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5; and
-Si(Q ₃ )(Q ₄ )(Q ₅ ) ; is selected from;
Wherein Q _{3 To} Q ₅ are each independently, C ₁ -C ₂₀ Alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group,
At least one of R ₂ to R ₄ is each independently selected from Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5, a carbazole-based compound:

In Formulas 4-1 to 4-48, 5-1 to 5-6, and 6-1 to 6-5,
Y ₃₁ is O, S, C(Z ₃₃ )(Z ₃₄ ), N(Z ₃₅ ) or Si(Z ₃₆ )(Z ₃₇ );
Z ₃₁ to Z ₃₇ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group an acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a C ₁ -C ₂₀ alkyl group-substituted phenyl group, a phenyl group-substituted phenyl group, Naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridi a nyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, and -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ );
wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group;
e2 is 1 or 2;
e3 is selected from an integer from 1 to 3;
e4 is selected from an integer from 1 to 4;
e5 is selected from an integer from 1 to 5;
e6 is selected from an integer from 1 to 6;
e7 is selected from an integer from 1 to 7;
* is a binding site with a neighboring atom. According to claim 1,
A carbazole-based compound represented by the following formula 1A or 1B:
<Formula 1A>

<Formula 1B>

In Formula 1A _{, the descriptions of X 1} , L ₃ , L ₅ , a3, a5, b2, b3, R ₁₁ , R ₁₂ , b11 and b12 are the same as those described in claim 1,
R ₂ and R ₃ are a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted Cyclic C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensation It is selected from a polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group. According to claim 1,
One of the following compounds 1 to 131, a carbazole-based compound:

a first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode, including a light emitting layer, and including at least one carbazole-based compound represented by Formula 1 of any one of claims 1 to 13; including, organic light emitting device. 15. The method of claim 14,
The first electrode is an anode,
The second electrode is a cathode,
The organic layer may include: i) a hole transport region interposed between the first electrode and the emission layer and including at least one of a hole injection layer, a hole transport layer, and an electron blocking layer; and ii) an electron transport region interposed between the emission layer and the second electrode and including at least one of a hole blocking layer, an electron transport layer, and an electron injection layer. 15. The method of claim 14,
The organic light emitting device, wherein the carbazole-based compound represented by Formula 1 is included in the light emitting layer. 15. The method of claim 14,
The light emitting layer includes a first host and a second host,
The first host and the second host are different from each other,
The carbazole-based compound represented by Formula 1 is included in the light emitting layer,
The first host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is, independently of each other,
Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; selected from among, including a carbazole-based compound,
The second host is i) represented by Formula 1, and ii) _{at least one of R 2} to R ₄ in Formula 1 is, independently of each other,
Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; selected from. containing a carbazole-based compound,
wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group, an organic light emitting device. 15. The method of claim 14,
The light emitting layer includes a host 1 and a host 2,
The host 1 and the host 2 are different from each other,
The carbazole-based compound represented by Formula 1 is included in the light emitting layer,
The host 1 includes a carbazole-based compound represented by Formula 1;
The host 2 is an organic light emitting device comprising at least one of a first compound represented by the following Chemical Formula 41 and a second compound represented by the following Chemical Formula 61:
<Formula 41>

<Formula 61>

<Formula 61A><Formula61B>

of the formulas
X ₄₁ is N-[(L ₄₂ ) _a42 -(R ₄₂ ) _b42 ], S, O, S(=O), S(=O) ₂ , C(=O), C(R ₄₃ )(R ₄₄ ), Si(R ₄₃ )(R ₄₄ ), P(R ₄₃ ), P(=O)(R ₄₃ ) or C=N(R ₄₃ );
Ring A ₆₁ in Formula 61 is represented by Formula 61A;
_{Ring A 62} in Formula 61 is represented by Formula 61B;
X ₆₁ is N-[(L ₆₂ ) _a62 -(R ₆₂ ) _b62 ], S, O, S(=O), S(=O) ₂ , C(=O), C(R ₆₃ )(R ₆₄ ), Si(R ₆₃ )(R ₆₄ ), P(R ₆₃ ), P(=O)(R ₆₃ ) or C=N(R ₆₃ );
X ₇₁ is C(R ₇₁ ) or N, X ₇₂ is C(R ₇₂ ) or N, X ₇₃ is C(R ₇₃ ) or N, X ₇₄ is C(R ₇₄ ) or N, and X ₇₅ is C(R ₇₅ ) or N, X ₇₆ is C(R ₇₆ ) or N, X ₇₇ is C(R ₇₇ ) or N, and X ₇₈ is C(R ₇₈ ) or N;
Ar ₄₁ , L ₄₁ , L ₄₂ , L ₆₁ and L ₆₂ are each independently, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkylene group, a substituted or Unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ arylene group, substituted or unsubstituted C ₂ - a C ₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;
n1 and n2 are each independently selected from an integer of 0 to 3;
a41, a42, a61 and a62 are each independently selected from an integer of 0 to 3;
R ₄₁ to R ₄₄ , R ₅₁ to R ₅₄ , R ₆₁ to R ₆₄ and R ₇₁ to R ₇₉ are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group , nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, substituted or unsubstituted C ₁ -C ₆₀ alkoxy group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, substituted or unsubstituted substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ Aryl group, substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, substituted or unsubstituted C ₆ -C ₆₀ arylthio group, substituted or unsubstituted C ₂ -C ₆₀ heteroaryl group, substituted or unsubstituted Condensed monovalent non-aromatic polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁ )(Q ₂ ), -Si(Q ₃ )(Q ₄ )(Q ₅ ) and -B(Q ₆ )(Q ₇ );
b41, b42, b51 to b54, b61, b62 and b79 are each independently selected from an integer of 1 to 3;
said substituted C ₁ -C ₆₀ alkylene group, substituted C ₂ -C ₆₀ alkenylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₂ -C ₁₀ heterocycloalkylene group, substituted C ₃ - C ₁₀ cycloalkenylene group, substituted C ₂ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₂ -C ₆₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic ring Group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C ₁ -C ₆₀ alkyl group, substituted C ₂ -C ₆₀ alkenyl group, substituted C ₂ -C ₆₀ alkynyl group, substituted C ₁ -C ₆₀ Alkoxy group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₂ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₂ -C ₁₀ heterocycloalkenyl group, substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group, a substituted C ₆ -C ₆₀ arylthio group, a substituted C ₂ -C ₆₀ heteroaryl group, a substituted a non-aromatic condensed polycyclic group, And at least one substituent of the substituted monovalent non-aromatic condensed heteropolycyclic group is,
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ -C ₆₀ arylthio group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₁₁ ) (Q ₁₂ ), -Si(Q ₁₃ )(Q ₁₄ )(Q _{15 ), C 1} -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, substituted with at least one of -B(Q ₁₆ )(Q _{17 )} , C ₂ -C ₆₀ alkynyl group and C ₁ -C ₆₀ alkoxy group;
C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl an oxy group, a C ₆ -C ₆₀ arylthio group, a C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
Deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group Or a salt thereof, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocyclo alkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come tea, C ₂ - C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q ₂₁ )(Q ₂₂ ), -Si(Q ₂₃ )(Q ₂₄ )(Q ₂₅ ) and -B(Q ₂₆ )(Q _{27 ), C 3} -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocyclo, substituted with at least one of -B(Q 26 )(Q 27 ). alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₂ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is non- -Aromatic heterocondensed polycyclic group; or
-N(Q ₃₁ )(Q ₃₂ ), -Si(Q ₃₃ )(Q ₃₄ )(Q ₃₅ ) and -B(Q ₃₆ )(Q ₃₇ ); is selected from;
The Q ₁ to Q ₇ , Q ₁₁ to Q ₁₇ , Q ₂₁ to Q ₂₇ and Q ₃₁ to Q ₃₇ are each independently hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₂ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₂ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₂ -C ₆₀ heteroaryl group, monovalent non-aromatic condensed polycyclic group and monovalent non-aromatic condensed heteropolycyclic group. 19. The method of claim 18,
At least one _{of R 2} to R ₄ in Formula 1 is each independently
Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolinyl group, isoquinolinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzothiazolyl group, isobenzothiazolyl group, benzo Oxazolyl group, isobenzooxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group, pyrimidobenzofuranyl group, pyridobenzothiophenyl group and pyrido midobenzothiophenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolyl group Nyl group, benzothiazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, imidazopyrimidinyl group, pyridobenzofuranyl group , a pyrimidobenzofuranyl group, a pyridobenzothiophenyl group and a pyrimidobenzothiophenyl group; is selected from
At least one of R ₄₁ , R ₄₂ and R ₅₂ in Formula 41 and at least one of R ₆₁ and R ₆₂ in Formula 61 are each independently selected from each other;
Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; is selected from
wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group, an organic light emitting device. 19. The method of claim 18,
At least one _{of R 2} to R ₄ in Formula 1 is each independently
Thiophenyl group, furanyl group, carbazolyl group, acridinyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, phenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group , heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluorante a nyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubysenyl group, a coronenyl group and an ovalenyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a thiophenyl group, a furanyl group, a carbazolyl group, an acridinyl, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group , pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenyl group Nalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, picenyl group, perylenyl group, pentaphenyl group, hexacenyl group, pentacenyl group group, rubysenyl group, coronenyl group and ovalenyl group; is selected from
At least one of R ₄₁ , R ₄₂ and R ₅₂ in Formula 41 and at least one of R ₆₁ and R ₆₂ in Formula 61 are each independently selected from each other;
Pyrrolyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindoleyl group, indole group Diary, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinolinyl group, phenanthridinyl group, phenanthroline nyl, phenazinyl, benzoimidazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxadiazolyl group, triazinyl group, imidazopyridinyl group, and imidazopyrimidinyl group; and
Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or a salt thereof, sulfonic acid or a salt thereof, phosphoric acid or Salts thereof, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, C ₁ -C ₂₀ alkyl group-substituted phenyl group, phenyl group-substituted phenyl group, naphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group and -Si (Q ₃₃ ) (Q ₃₄ ) (Q ₃₅ ) substituted with at least one of a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, Quinazolinyl group, cinolinyl group, phenanthridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl group, isobenzothiazolyl group, benzooxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, oxa a diazolyl group, a triazinyl group, an imidazopyridinyl group and an imidazopyrimidinyl group; is selected from
wherein Q ₃₃ to Q ₃₅ are each independently, C ₁ -C ₂₀ alkyl group, C ₁ -C ₂₀ alkoxy group, phenyl group, naphthyl group, anthracenyl group, pyrenyl group, phenanthrenyl group, fluorenyl group, chrysenyl group , carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, quinazolinyl group and a quinoxalinyl group, an organic light emitting device.

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