Hole-transporting polymers containing carbazol-3,9-diyl and 1,4-phenylene fragments in the main chain

被引：4

作者：

Grigalevicius, Saulius ^{[1
]}

Simokaitiene, Jurate ^{[1
]}

Grazulevicius, Juozas V. ^{[1
]}

Ma, Liang ^{[2
]}

Xie, Zhiyuan ^{[2
]}

机构：

[1] Kaunas Univ Technol, Dept Organ Technol, LT-50254 Kaunas, Lithuania

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

SYNTHETIC METALS | 2008年 / 158卷 / 19-20期

关键词：

Amorphous material; Copolymer; Light emitting diode; Thermal stability;

D O I：

10.1016/j.synthmet.2008.04.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New carbazole-based polymers, which contain various content of electro-active fragments in the main chain connected via alkylene spacers, have been synthesized by Ni(0)-catalyzed Yamamoto-type aryl-aryl coupling reactions. These compounds represent amorphous materials of high thermal stability with glass-transition temperatures of 139-151 degrees C and thermal decomposition starting at temperatures above 400 degrees C. UV-vis absorption and photoluminescence emission spectra of the materials confirmed that the conjugated segments in the macromolecules are rather short. However, the polymers with varying content of the electro-active chromophores demonstrate different charge injection and transport properties in multilayer light emitting diodes with the polymers as the hole transport and tris(8-quinolinato)aluminium (Alq(3)) as the electroluminescent/electron transport layer. The device based on the polymer containing bicarbazole segments in the main chain exhibits the best overall performance (turn-on voltage: 4V; maximum photometric efficiency: 2.6cd/A; maximum brightness: approximately 2200cd/m(2)). (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：739 / 743

页数：5

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