Lg Chem, Ltd

Mi Young Chae

Min Woo Jung

Tae Yoon Park

Seong Mi Cho

Jung Ha Lee

Jeong Wook Mun

Dong Hoon Lee

Min Young Kang

Provided is a heterocyclic compound of Chemical Formula 1:

Heterocyclic compound and organic light emitting device comprising the same

Provided is a heterocyclic compound of Chemical Formula 1: where Xis O or S; Land Lare each independently a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted naphthylene, or a substituted or unsubstituted biphenylenyl; Yto Yare each independently N or CR, provided that at least one of Yto Yis N; and Arand Arare each independently a substituted or unsubstituted Caryl or a substituted or unsubstituted Cheteroaryl containing 1 to 3 heteroatoms selected from the group consisting of N, O and S;and an organic light emitting device comprising the same, where the compound of Chemical Formula 1 can be used as a material of an organic material layer of an organic light emitting device and can exhibit improved efficiency, a low driving voltage and/or improved lifetime characteristics of the organic light emitting device.

Provided is a compound of Chemical Formula 1 or 2: wherein: Xto Xare N or CH, with the proviso that at least one of Xto Xis N; Y is O or S; Land Lare each independently a single bond or a substituted or unsubstituted Carylene; and Ar is a substituted or unsubstituted Calkyl, a substituted or unsubstituted Chaloalkyl, a substituted or unsubstituted Ccycloalkyl, a substituted or unsubstituted Caryl, or a substituted or unsubstituted Cheteroaryl containing one to three heteroatoms selected from the group consisting of N, O, and S, and an organic light emitting device including the same.

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Daejeon, South Korea

Mi Young Chae