CARBAZOLE DERIVATIVES AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME

摘要

The present invention relates to a carbazole derivative organic light emitting compound and an organic light emitting device comprising the same. In the compound disclosed in the present invention, a substituent introduced at the ortho position induces the steric distortion in the organic light emitting compound to disconnect the pie conjugation, thereby minimizing the expansion of the conjugation between substituents due to a high steric hindrance, thus maintaining excellent triplet energy, and a hole transport substituent and an electron transport substituent are respectively bound to a benzene ring, thereby exhibiting excellent hole injection transport and electron injection transport characteristics. The compound disclosed in the present invention has excellent blue and green phosphorescent characteristics together with superior quantum efficiency, current efficiency, and power efficiency, and thus can be favorably used as an efficient phosphorescent host material.