Lg Chem, Ltd

Hoyoon Park

Sung Kil Hong

Dong Uk Heo

Miyeon Han

Heekyung Yun

Jae Tak Lee

Jun Woo Yun

Jung Min Yoon

Provided is an organic light-emitting device comprising: a light emitting layer comprising a compound of the following Chemical Formula 1, and one or more of an electron transport layer, an electron injection layer, or an electron transport and injection layer that comprises at least one of a compound of the following Chemical Formula 2 and a compound of the following Chemical Formula 3: wherein Arand Arare each independently a substituent of Chemical Formula 4, where Xto Xare each independently N or C(R), wherein at least two of Xto Xare N, and the other substituents are as defined in the specification. The organic light emitting device including the heterocyclic compound of Chemical Formula 1 and the heterocyclic compound of Chemical Formula 2 or 3 had significantly superior efficiency and lifespan.

Organic light emitting device

Growing community of inventors

Daejeon, South Korea

Hoyoon Park