Synthesis of new bipolar host materials based on 1,2,4-oxadiazole for blue phosphorescent OLEDs

被引：35
|
作者：
Li, Qian [1 ]
Cui, Lin-Song [1 ]
Zhong, Cheng [2 ]
Yuan, Xiao-Dong [1 ]
Dong, Shou-Cheng [1 ]
Jiang, Zuo-Quan [1 ]
Liao, Liang-Sheng [1 ]
机构：
[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China
[2] Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
来源：
DYES AND PIGMENTS | 2014年 / 101卷
关键词：
OLEDs; 1,2,4-Oxadiazole; Bipolar; Host material; Electrophosphorescence; High triplet energy; LIGHT-EMITTING-DIODES; PHOSPHINE OXIDE HOST; GREEN; ELECTROLUMINESCENCE; CARBAZOLE; HYBRIDS; META; 1,3,4-OXADIAZOLE; DERIVATIVES; COPOLYMERS;
D O I：
10.1016/j.dyepig.2013.09.029
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Two novel bipolar host materials, namely 3,5-bis(4-(9H-carbazol-9-yl)pheny1)-1,2,4-oxadiazole (pCzmOXD) and 3,5-bis(3-(9H-carbazol-9-yl)pheny1)-1,2,4-oxadiazole (mCzmOXD) were designed and synthesized, by incorporating a new block 1,2,4-oxadiazole as the n-type moiety and changing its linking pattern with carbazole. As expected, high triplet energy (over 2.81 eV) for mCzmOXD was achieved due to the intrinsic meta-linkage of 1,2,4-oxadiazole. When both materials were applied in blue phosphorescent organic light-emitting diodes, good performance of 13.0 cd A(-1)/16.0 cd A(-1) were achieved for pCzmOXD and mCzmOXD in iridium(III) bis[(4, 6 - difluorophenyl)pyridinato - N, C-2'] picolinate (Flrpic)-based devices, respectively. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：142 / 149
页数：8
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