Abstract
Triphenylene derivatives having a structure of formula (1) are provided. Ar represents an aromatic compound, n is 1 to 3, and each of R and R.sub.1 to R.sub.13 is a member independently selected from the group consisting of hydrogen, halo, cyano, trifluoromethyl, amino, C.sub.1-C.sub.10 alkyl, C.sub.2-C.sub.10 alkenyl, C.sub.2-C.sub.10 alkynyl, C.sub.3-C.sub.20 cycloalkyl, C.sub.3-C.sub.20 cycloalkenyl, C.sub.1-C.sub.20 heterocycloalkyl, C.sub.1-C.sub.20 heterocycloalkenyl, aryl and heteroaryl. The compound of the present invention may function as a host emitter or dopant in the emitter layer of OLED device. An OLED device is also herein provided.