| 摘要 |
PROBLEM TO BE SOLVED: To provide a new class of compounds containing aza-dibenzothiophene or aza-dibenzofuran.SOLUTION: 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 a host material of an emissive layer having a host and an emissive dopant, or as a material in an enhancement layer. |
