The electronic role of the TiO2 light-scattering layer in dye-sensitized solar cells

被引：46
作者：
Zhang, Zhipan
Ito, Seigo
O'Regan, Brian
Kuang, Daibin
Zakeeruddin, Shaik Mohammed
Liska, Paul
Charvet, Raphael
Comte, Pascal
Nazeeruddin, Mohammad Khaja
Pechy, Peter
Humphry-Baker, Robin
Koyanagi, Tsuguo
Mizuno, Takaki
Graetzel, Michael [1 ]
机构：
[1] Swiss Fed Inst Technol, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem & Phys, London SW7 2AZ, England
[3] CCIC Ltd, Wakakatsu Ku, Kitakyushu, Fukuoka 8080027, Japan
来源：
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 2007年 / 221卷 / 03期
关键词：
solar-energy conversion; dye sensitizer solar cells; light containment; scattering layer;
D O I：
10.1524/zpch.2007.221.3.319
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 have been fabricated with different kinds of TiO2 films including SiO2 coated and bare TiO2 microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 mu m thick LSL alone showed a conversion efficiency of 5% despite of being pate pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.
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收藏
页码：319 / 327
页数：9
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