CARBAZOLE SUBSTITUTED TRIAZOLE, TRIAZINE, AND TETRAZINE AMBIPOLAR HOST MATERIALS AND DEVICES

摘要

Disclosed herein are ambipolar host compounds represented by formula (I): (I), wherein: a) at least one of the R1, R2 and R3 groups is an optionally substituted carbazole group, and the remaining of R1, R2 and R3 are independently selected from hydrogen, halogen and a C1-20 organic group; b) R4 is an optionally substituted alkyl group, an optionally substituted heteroalkyl group, a substituted aryl group comprising at least one heteroatom in the substituent, or an optionally substituted heteroaryl group; and c) Y is selected from, and, wherein R5 is an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl group or an optionally substituted heteroalkyl group, and wherein R6 is hydrogen, an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl group or an optionally substituted heteroalkyl group. The compounds can be used in OLED devices.