Dye-sensitized solar cells based on multiwalled carbon nanotube-titania/titania bilayer structure photoelectrode

被引:45
作者
Lin, Wei-Jhih [1 ]
Hsu, Chun-Tsung [1 ]
Tsai, Yu-Chen [1 ]
机构
[1] Natl Chung Hsing Univ, Dept Chem Engn, Taichung 402, Taiwan
关键词
Dye-sensitized solar cells; Multiwalled carbon nanotubes; TiO2; nanoparticles; ENERGY-CONVERSION; TIO2; FILM; EFFICIENCY; TRANSPORT; RECOMBINATION; FABRICATION; ELECTRODES;
D O I
10.1016/j.jcis.2011.03.031
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dye-sensitized solar cells (DSSCs) were fabricated using multiwalled carbon nanotube (MWCNT)-TiO2 nanocomposite as a light scattering layer. Morphology of the MWCNT-TiO2 film was investigated by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). FESEM and TEM images demonstrate that MWCNTs and TiO2 nanoparticles can be dispersed with chitosan. Internal resistance in the DSSC was characterized by electrochemical impedance spectroscopy (EIS). EIS results reveal a decrease in the charge resistance of electrolyte/dye/MWCNT-TiO2/TiO2 interface with increasing MWCNT content up to 3wt% which leads to an improvement in the photovoltaic performance. Compare with a nanocrystalline TiO2 single-layer cell, the DSSC based on the MWCNT (3wt%)-TiO2/TiO2 bilayer structure photoelectrode shows similar to 100% increase in solar-to-electric energy conversion efficiency, which is attributed to the inclusion of MWCNTs in TiO2 matrix. Copyright (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码:562 / 566
页数:5
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