A strong hole transport type host material for high quantum efficiency blue phosphorescent organic light-emitting diodes

作者：Yoo Seung Geon; Jeon Sang Kyu; Hwang Seok Ho; Lee Jun Yeob^*

来源：Journal of Industrial and Engineering Chemistry, 2015, 32: 72-76.

DOI：10.1016/j.jiec.2015.07.020

• Bicarbazole
• Hole transport
• Triplet host
• High triplet energy
• High efficiency

A strong hole transport type host material derived from bicarbazole and ditolylamine, 4,4'-(9H,9'H-[2,3'-bicarbazole]-9,9'-diy1)bis(N,N-di-p-tolylaniline) (BCTA), was synthesized as the host material of blue emitting tris[1-(2,4-diisopropyldibenzo[b,d]furan-3-yl)-2-phenylimidazole] (Ir(dbi)(3)) triplet emitter. The strong hole transport character of BCTA compensated hole trapping effect of Ir(dbi)(3) and optimized charge balance in the emitting layer, delivering 17.8% external quantum efficiency in the blue phosphorescent organic light-emitting diodes.

• 出版日期2015-12-25