Influence of the cyano-group on the optical properties of oligomeric PPV-derivatives

被引:33
作者
Hanack, M [1 ]
Behnisch, B [1 ]
Häckl, H [1 ]
Martinez-Ruiz, R [1 ]
Schweikart, KH [1 ]
机构
[1] Univ Tubingen, Inst Organ Chem, D-72076 Tubingen, Germany
关键词
electroluminescence; photoluminescence; PPV-derivatives; Knoevenagel reaction; distyrylbenzene;
D O I
10.1016/S0040-6090(02)00591-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of oligomers analogous to poly (p-phenylenevinylene) (PPV 1) have been synthesized by various condensation reactions. Particular emphasis is placed upon the preparation of distyrylbenzenes with the electron-withdrawing cyano-group located in different positions of the conjugated system for comparison with the low band-gap polymer CN-PPV 2. Systematic variation of the location of the cyano-group allows us to tune the electronic as well as the optical properties. The electroluminescent behavior of the new emitting materials was studied in devices of the type ITO/copper phthalocyanine/oligomer/aluminium, showing a wide spectral range from blue-green to yellow, depending on the position of the cyano-group. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:26 / 31
页数:6
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