Electrical and optical properties of thin films of DNA:PEDOT

被引：12
作者：
Kazukauskas, V. [1 ,2 ]
Pranaitis, M. [1 ,2 ]
Arlauskas, A. [1 ,2 ]
Krupka, O. [3 ]
Kajzar, F. [3 ]
Essaidi, Z. [3 ]
Sahraoui, B. [3 ]
机构：
[1] Vilnius State Univ, Semicond Phys Dept, LT-10222 Vilnius, Lithuania
[2] Vilnius State Univ, Inst Appl Res, LT-10222 Vilnius, Lithuania
[3] Univ Angers, MOLTECH Anjou, UMR 6200, CNRS,MINOS, F-49045 Angers, France
来源：
OPTICAL MATERIALS | 2010年 / 32卷 / 12期
关键词：
Deoxyribonucleic acid (DNA); PEDOT; Electrical conductivity; Photoconductivity; Carrier trapping; Light absorption; DNA; CONDUCTIVITY; TRANSPORT;
D O I：
10.1016/j.optmat.2010.05.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report investigations of functionalized DNA:PEDT-PSS films. The electrical conductivity of the sample material at the room temperature was about (1-5) x 10(-10) Omega(-1) cm(-1). The IV curves of the samples were linear and symmetrical in the region from the room temperature down to the liquid nitrogen temperature. The thermal activation energy of the conductivity near the room temperature was about 0.033 eV independently on the applied bias. The weak carrier trapping was identified by the Thermally Stimulated Current method, proving the fast recombination of light-generated carriers. Notably, by constant light excitation a "bistable" photoconduction below the room temperature was evidenced, i.e., upon excitation by a white light a remarkable increase of the photocurrent could be observed below 145-155 K by cooling the samples. Meanwhile by heating the photosensitivity remained increased up to 235-245 K. Such phenomenon could presumably be attributed to the light-induced changes of the sample material morphology and/or associated variation of carrier transport conditions. (C) 2010 Elsevier B.V. All rights reserved.
引用
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页码：1629 / 1632
页数：4
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