Date：2016-08-31 |
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OLED Information 20160831 Synthesis of novel benzothiophene derivative as a host material for blue phosphorescent organic light-emitting diodes |
Synthesis of novel benzothiophene derivative as a host material for blue phosphorescent organic light-emitting diodes
Article excerpt is from: Chohyun Seo, Jeong Min Choi, Seong-Soo Hong, Jun Yeob Lee, SungYong Seo
Dyes and Pigments 136 (2017) 145-149
An organic compound having carbazole, benzothiophene, and phosphine oxide moieties, (5-(9H-carbazol-9-yl)benzo[b]thiophen-2-yl)diphenylphosphine oxide (CBTPO), was synthesized and employed as a blue host material to harvest triplet excitons from blue triplet emitters. The CBTPO material is a bipolar host material because it includes carbazole and diphenylphosphine oxide charge transport units with both a high triplet energy of 2.76 eV and a high quantum efficiency of 19.1% in blue phosphorescent device.
