A high triplet energy phosphine oxide derivative as a host and exciton blocking material for blue phosphorescent organic light-emitting diodes

被引：25

作者：

Jeon, Soon Ok ^{[1
]}

Yook, Kyoung Soo ^{[1
]}

Joo, Chul Woong ^{[1
]}

Son, Hyo Suk ^{[1
]}

Lee, Jun Yeob ^{[1
]}

机构：

[1] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea

来源：

THIN SOLID FILMS | 2010年 / 518卷 / 14期

关键词：

Phosphine oxide; Blue phosphorescent organic light-emitting diodes; Current efficiency; Quantum efficiency; ELECTROPHOSPHORESCENCE; TRANSPORT; EFFICIENT; DEVICES;

D O I：

10.1016/j.tsf.2009.10.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have designed and synthesized a blue phosphorescent host material based on a phosphine oxide moiety. 2-(diphenylphosphine oxide)-9,9'-spirobifluorene (SPPO1) was compared with N,N'-dicarbazolyl-3,5-benzene (mCP) as a blue host material in blue phosphorescent organic light-emitting diodes (PHOLEDs). The SPPO1 was effective as a host for blue PHOLEDs and the SPPO1 based blue PHOLEDs showed much higher quantum efficiency than common mCP based blue PHOLEDs. A high quantum efficiency of 16.3% and a current efficiency of 31.4 cd/A were obtained in the blue PHOLED with iridium(III) bis(4,6-(difluorophenyl)-pyridinato-N,C2') picolinate (Flrpic) as a blue phosphorescent dopant. In addition, SPPO1 was also effective as an exciton blocking material for the blue PHOLED. (C) 2009 Elsevier BM. All rights reserved.

引用

页码：3716 / 3720

页数：5

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