[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.