TECHNICAL FIELD

The present specification relates to a heterocyclic compound and an organic light emitting device comprising the same.

BACKGROUND ART

An electroluminescent device is one type of self-emissive display devices, and has an advantage of having a wide viewing angle, and a high response speed as well as having an excellent contrast.

An organic light emitting device has a structure disposing an organic thin film between two electrodes. When a voltage is applied to an organic light emitting device having such a structure, electrons and holes injected from the two electrodes bind and pair in the organic thin film, and light emits as these annihilate. The organic thin film may be formed in a single layer or a multilayer as necessary.

A material of the organic thin film may have a light emitting function as necessary. For example, as a material of the organic thin film, compounds capable of forming a light emitting layer themselves alone may be used, or compounds capable of performing a role of a host or a dopant of a host-dopant-based light emitting layer may also be used. In addition thereto, compounds capable of performing roles of hole injection, hole transfer, electron blocking, hole blocking, electron transfer, electron injection and the like may also be used as a material of the organic thin film.

Development of an organic thin film material has been continuously required for enhancing performance, lifetime or efficiency of an organic light emitting device.

DISCLOSURE

Technical Problem

The present disclosure is directed to providing a heterocyclic compound and an organic light emitting device comprising the same.

Technical Solution

One embodiment of the present application provides a heterocyclic compound represented by the following Chemical Formula 1.



In Chemical Formula 1,

X is O or S,

L1and L2are a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group,

Z2is hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroaryl group; —SiRR′R″; or —P(═O)RR′,

X1to X3are the same as or different from each other, and each independently N; CR3; or P,

R1and R2are the same as or different from each other, and each independently hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroaryl group; or P(═O)RR′,

R3is hydrogen; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroaryl group; or P(═O)RR′,

Raand Rbare the same as or different from each other, and each independently hydrogen; deuterium; a halogen group; —CN; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted alkynyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted heterocycloalkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroaryl group; —SiRR′R″; —P(═O)RR′; and an amine group unsubstituted or substituted with a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted aliphatic or aromatic hydrocarbon ring,

R, R′ and R″ are the same as or different from each other, and each independently hydrogen; deuterium; —CN; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,

m is an integer of 0 to 4,

p and n are an integer of 0 to 3,

q is an integer of 0 to 3,

s is an integer of 1 to 4, and

when q is an integer of 0 and Z2is hydrogen, n is an integer of 2 or 3, and Rbis a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted aliphatic or aromatic hydrocarbon ring.

Another embodiment of the present application provides an organic light emitting device comprising a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more layers of the organic material layers comprise the heterocyclic compound represented by Chemical Formula 1.

Advantageous Effects

The compound described in the present specification can be used as an organic material layer material of an organic light emitting device. The compound is capable of performing a role of a hole injection material, a hole transfer material, a light emitting material, an electron transfer material, an electron injection material and the like in the organic light emitting device. Particularly, the heterocyclic compound represented by Chemical Formula 1 can be used as an electron transfer layer material, a hole blocking layer material or a charge generation layer material of the organic light emitting device. In addition, when using the compound represented by Chemical Formula 1 in the organic material layer, a driving voltage is lowered and light efficiency is enhanced in the device, and device lifetime properties can be enhanced by thermal stability of the compound.

In addition, the compound of Chemical Formula 1 is a bipolar-type compound having both P-type and N-type substituents in the core structure, and, when used as an organic material layer of an organic light emitting device afterword, is capable of blocking hole leakage and effectively trapping excitons in a light emitting layer. In addition, hole properties are strengthened in a specific device structure changing electron mobility relatively slowly, which balances electrons and holes in the light emitting layer properly forming a recombination region of the excitons, and as a result, efficiency and lifetime increase.

