A new class of compounds containing aza-dibenzothiophene or aza-dibenzofuran are provided. The compounds may be used in organic light emitting devices giving improved stability, improved efficiency, long lifetime and low operational voltage. In particular, the compounds may be used as the host material of an emissive layer having a host and an emissive dopant, or as a material in an enhancement layer.
提供了一类新的化合物,其中包含aza-
二苯并噻吩或aza-
二苯并呋喃。这些化合物可以用于有机发光器件,具有改善的稳定性、效率提高、长寿命和低操作电压。特别是,这些化合物可以用作具有主机和发射掺杂物的发射层的主机材料,或者用作增强层中的材料。