m-Terphenyl-modified carbazole host material for highly efficient blue and green PHOLEDS

Abstract
A simple m-terphenyl modified carbazole derivative, 9-phenyl-3,6-bis-[1,1′;3′1″]terphenyl-5′-yl-9H-carbazole (CzTP) was developed. By using CzTP as a host material, the PHOLEDs showed the maximum power efficiencies (ηp, max) of 55 lm W−1 for blue and 113 lm W−1 for green, respectively.