Enhancement of electroluminescence properties of red diketopyrrolopyrrole-doped copolymers by oxadiazole and carbazole units as pendants

被引：13

作者：

Jin, Yi ^{[1
]}

Xu, Yanbin ^{[1
]}

Qiao, Zhi ^{[1
]}

Peng, Junbiao ^{[2
]}

Wang, Baozheng ^{[2
]}

Cao, Derong ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

[2] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

POLYMER | 2010年 / 51卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Diketopyrrolopyrrole; Conjugated polymer; Light emitting diodes (LED); LIGHT-EMITTING-DIODES; SIMULTANEOUS 2-COLOR EMISSION; SINGLE-POLYMER SYSTEM; CONJUGATED POLYMERS; WHITE ELECTROLUMINESCENCE; ELECTRON-TRANSPORT; POLY(FLUORENE)-BASED COPOLYMERS; POLY(PHENYLENE VINYLENE)S; HIGHLY LUMINESCENT; IRIDIUM COMPLEXES;

D O I：

10.1016/j.polymer.2010.09.046

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two novel diketopyrrolopyrrole (DPP)-based copolymers P1-2 were prepared by doping red emitting DPP monomer (1 mol%) into benzothiadiazole alkoxybenzene and 9 9-dialkylfluorene-based copolymers through base-free Suzuki polymerization P1 contained the pendants of electron-transport oxadiazole and hole-transport carbazole but P2 did not contain them P1 had higher glass transition temperature than P2 The electroluminescence (EL) devices of P1 and P2 (ITO/PEDOT PSS/polymer/CsF/Al) exhibited red emission with external quantum efficiency of 0 63% and 0 18% and with brightness of 2681 and 885 cd/m(2) respectively The results show that the EL properties of P1 are much better than that of P2 due to the introduction of oxadiazole and carbazole as the pendants The pendants could restrain aggregation which might induce fluorescence quenching and are of benefit to keep high charge mobility The efficient energy transfer existed among the pendants polymer backbone and DPP unit These factors should be responsible for the higher EL performance of P1 (C) 2010 Elsevier Ltd All rights reserved

引用

页码：5726 / 5733

页数：8

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