Dielectric Behavior of Poly(3-Hexylthiophene)/Carbon Nanotube Composites by Broadband Dielectric Spectroscopy

被引:3
作者
Petre, Anca [1 ,2 ]
Diaham, Sombel [1 ,2 ]
Reyes-Melo, Edgar [3 ]
Saini, Viney [4 ,5 ]
Li, Zhongrui [4 ,5 ]
Dervishi, Enkeleda [4 ,5 ]
Xu, Yang [4 ,5 ]
Biris, Alexandru S. [4 ,5 ]
机构
[1] Univ Toulouse 3, Inst Natl Polytech Toulouse, Lab Plasma & Convers Energie LAPLACE, F-31062 Toulouse 9, France
[2] CNRS, LAPLACE, F-31062 Toulouse, France
[3] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, Mexico
[4] Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
[5] Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USA
关键词
Dielectric spectroscopy; poly(3-hexylthiophene) (P3HT); relaxation; CARBON NANOTUBES; CONDUCTIVITY; MORPHOLOGY; 1ST-ORDER; SUPPORT; GROWTH;
D O I
10.1109/TIA.2010.2041086
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Some of the most exciting novel approaches for renewable solar energy conversion are organic photovoltaic devices that take advantage of the unique properties of polymers such as poly(3-hexylthiophene) (P3HT). Although these types of devices present significant advantages (stability and price), their long-term performance has to be continuously improved. This paper describes the dielectric behavior of pristine P3HT and its nanocomposites versus temperature and frequency by using broadband dielectric spectroscopy. Dielectric spectra reveal the existence of two relaxation phenomena (alpha, beta), below and above the glass transition. The alpha relaxation is related to the crystallization phenomena, and the beta relaxation is due to dipolar polarization processes. These results can be incorporated into a continuous understanding of the electrical behaviors of such polymers, which play extremely important roles in the overall quality of photovoltaic devices that use such polymeric materials.
引用
收藏
页码:627 / 633
页数:7
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