NEW MATERIALS WITH AZA-DIBENZOTHIOPHENE OR AZA-DIBENZOFURAN CORE FOR PHOLED

摘要

A new class of compounds containing aza-dibenzothiophenes or aza-dibenzofurans is provided. The compounds can be used in organic light emitting devices that provide improved stability, improved efficiency, long lifetime and low operating voltage. In particular, the compound can be used as a host material for a light emitting layer having a host and a light emitting dopant, or as a material for an enhancement layer.