Efficient green organic light-Emitting devices with a nondoped dual-functional electroluminescent material

Abstract

An efficient nondoped green organic light-emitting device was demonstrated by using a dual-functional electroluminescent material, 4,4′,4″-tris[8-(7,10-diphenylfluoranthenyl)] phenylamine (TDPFPA). TDPFPA was shown to be a good hole transporting [with a mobility of (1.1–1.2)×10−4cm2V−1s−1 at (1.8–5.6)×105Vcm−1] and efficient fluorescent material with an exceptionally high glass transition temperature of 237°C. The device with a simple structure of indium tin oxide/TDPFPA/4,7-diphenyl-1,10-phenanthroline/LiF∕Al showed green emission with Commission Internationale de L’Eclairage coordinates of (0.24, 0.54), a current efficiency of 9.9cd∕A, and power efficiency of 10.6lm∕W.