Photoelectrical properties in poly(alkyl/alkoxy-terthiophenes): dependence on the alkyl-chain length

被引:10
作者
Casalbore-Miceli, G
Camaioni, N
Gallazzi, MC
Albertin, L
Fichera, AM
Geri, A
Girotto, EM
机构
[1] Ist Fotochim & Radiaz Alta Energia, I-40129 Bologna, Italy
[2] Politecn Milan, Dipartimento Chim Ind & Ingn Chim, I-20133 Milan, Italy
[3] CNR, Ctr Studio Fis Macromol, I-40126 Bologna, Italy
[4] Univ Nacl Estadual Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
poly(alkoxy-alkyl-terthiophenes); electropolymerisation; photoelectrical properties;
D O I
10.1016/S0379-6779(01)00488-X
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The length of the alkyl-groups affects both the spectrophotometric and the electrochemical properties of poly(alkoxy-alkyl-terthiophenes) films prepared by cyclic voltammetry. The maximum absorbance shifts towards higher wavelengths and the oxidation peak towards cathodic potentials as the alkyl-chain length increases. Moreover, it was found that the photoelectrical performance exhibited by poly(alkoxy-alkyl-terthiophenes)-based devices improved from poly(4,4 " -dipenthoxy-3-dodecyl-2,2':5',2 " -terthiophene) to poly(4,4 " -dipenthoxy-3'-hexyl-2,2':5',2 " -terthiophene), probably due to an increasing hopping mobility, and remained constant or somewhat decreased by going from poly(4,4 " -dipenthoxy-3'-hexyl-2,2':5,2 " -terthiophene) to poly(4,4 " -dimethoxy-3'-methyl-2,2':5',2 " -terthiophene) possibly for a lower planarity of polythiophene chains. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:307 / 311
页数:5
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