CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No. 10-2019-0016836, filed on Feb. 13, 2019, in the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference.

BACKGROUND

1. Field

One or more embodiments of the present disclosure relate to an organic light-emitting device including an organic layer that includes a carbazole derivative compound.

2. Description of the Related Art

Organic light-emitting devices are self-emission devices that have wide viewing angles, high contrast ratios, short response times, excellent characteristics in terms of brightness, driving voltage, and/or response speed, and can produce full-color images, compared to other devices in the art.

An example of such organic light-emitting device may include a first electrode disposed (e.g., positioned or located) on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially disposed on the first electrode. Holes provided from the first electrode may move toward the emission layer through the hole transport region, and electrons provided from the second electrode may move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, may then recombine in an emission layer region to produce excitons. Then, the excitons are transitioned from an excited state to a ground state, thereby generating light.

In related art, a phenylenediamine structure is disclosed as a hole injection material that may be used for an organic light-emitting device. As hole transport materials, an aromatic diamine derivative, an aromatic condensed cyclic diamine derivative, and/or the like are known. As a compound improved (or derived) from these compounds, a carbazole-containing arylamine-based compound has been disclosed and used as a hole transport material. In addition, an arylamine-based compound having a carbazole group in which position 3 is substituted has been disclosed and used as a hole injection material.

However, since devices in which these compounds are used for a hole injection layer and/or a hole transport layer often have insufficient luminous efficiency, there is a need for improved efficiency characteristics.

SUMMARY

One or more aspects of embodiments of the present disclosure are directed toward a hole transport compound having improved efficiency characteristics as compared to a comparable compound and a device including the same.

Additional embodiments will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

An embodiment of the present disclosure provides an organic light-emitting device including:

a first electrode;

a second electrode facing the first electrode; and

an organic layer between the first electrode and the second electrode, the organic layer including an emission layer,

wherein the organic layer includes a carbazole derivative,

a substituent selected from a substituted or unsubstituted C6-C60aryl group, a substituted or unsubstituted C1-C60heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group is linked to position 2 of a carbazole group of the carbazole derivative,

an amine-based substituent is directly or indirectly linked to position 3 of the carbazole group of the carbazole derivative, and

a substituted or unsubstituted C6-C60aryl group is linked to position 9 of the carbazole group of the carbazole derivative.

Another aspect of the present disclosure provides a compound represented by Formula 1:



In Formula 1,

R1, R2, R4to R9, Ar1, and Ar2may each independently be selected from hydrogen, deuterium, a substituted or unsubstituted C6-C60aryl group, a substituted or unsubstituted C1-C60heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,

L may be selected from a single bond, a substituted or unsubstituted C6-C60arylene group, a substituted or unsubstituted C1-C60heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

at least one substituent of the substituted C6-C60aryl group, the substituted C1-C60heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group, the substituted C6-C60arylene group, the substituted C1-C60heteroarylene group, the substituted divalent non-aromatic condensed polycyclic group, and the substituted divalent non-aromatic condensed heteropolycyclic group may be selected from:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C60alkyl group, a C2-C60alkenyl group, a C2-C60alkynyl group, and a C1-C60alkoxy group;

a C1-C60alkyl group, a C2-C60alkenyl group, a C2-C60alkynyl group, and a C1-C60alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C3-C10cycloalkyl group, a C1-C10heterocycloalkyl group, a C3-C10cycloalkenyl group, a C1-C10heterocycloalkenyl group, a C6-C60aryl group, a C6-C60aryloxy group, a C6-C60arylthio group, a C1-C60heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q11)(Q12)(Q13), —N(Q11)(Q12), —B(Q11)(Q12), —C(═O)(Q11), —S(═O)2(Q11), and —P(═O)(Q11)(Q12);

a C3-C10cycloalkyl group, a C1-C10heterocycloalkyl group, a C3-C10cycloalkenyl group, a C1-C10heterocycloalkenyl group, a C6-C60aryl group, a C6-C60aryloxy group, a C6-C60arylthio group, a C1-C60heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

a C3-C10cycloalkyl group, a C1-C10heterocycloalkyl group, a C3-C10cycloalkenyl group, a C1-C10heterocycloalkenyl group, a C6-C60aryl group, a C6-C60aryloxy group, a C6-C60arylthio group, a C1-C60heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C60alkyl group, a C2-C60alkenyl group, a C2-C60alkynyl group, a C1-C60alkoxy group, a C3-C10cycloalkyl group, a C1-C10heterocycloalkyl group, a C3-C10cycloalkenyl group, a C1-C10heterocycloalkenyl group, a C6-C60aryl group, a C6-C60aryloxy group, a C6-C60arylthio group, a C1-C60heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q21)(Q22)(Q23), —N(Q21)(Q22), —B(Q21)(Q22), —C(═O)(Q21), —S(═O)2(Q21), and —P(═O)(Q21)(Q22); and

—Si(Q31)(Q32)(Q33), —N(Q31)(Q32), —B(Q31)(Q32), —C(═O)(Q31), —S(═O)2(Q31), and —P(═O)(Q31)(Q32), and

Q11to Q13, Q21to Q23, and Q31to Q33may each independently be selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C60alkyl group, a C2-C60alkenyl group, a C2-C60alkynyl group, a C1-C60alkoxy group, a C3-C10cycloalkyl group, a C1-C10heterocycloalkyl group, a C3-C10cycloalkenyl group, a C1-C10heterocycloalkenyl group, a C6-C60aryl group, a C1-C60heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

Another embodiment of the present disclosure provides an electronic apparatus including a thin-film transistor and the organic light-emitting device described above, wherein the thin-film transistor includes a source electrode, a drain electrode, an active layer, and a gate electrode, and the first electrode of the organic light-emitting device is in electrical contact with one of the source electrode and the drain electrode of the thin-film transistor.

