期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 42, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/42/8/085105
关键词
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资金
- Program for New Century Excellent Talents in University [NCET-04-0975]
- National Fund for Fostering Talents of Basic Science [J0630313]
Hierarchically structured ZnO nanospheres are synthesized by a wet-chemical method and ZnO sphere-consisting films are applied to dye-sensitized solar cells (DSSCs). It is found that the overall light-to-electricity conversion efficiency (eta) is significantly enhanced from 0.474% to 1.03% due to light scattering compared with the ZnO nanoparticle-based DSSC. However, the fill factor (FF) and open-circuit voltage (V-oc) decrease obviously. After annealing the films in an oxygen environment and placing a ZnO blocking layer on the fluorine-doped SnO2 (FTO) conducting substrate, the FF and V-oc are greatly improved and eta increases from 1.03% to 1.59% and 2.25%, respectively. According to the results of x-ray diffraction and photoluminescence, the significant improvements in the cell performances might be due to the suppression of the recombination and the decrease in the resistances existing in the cell.
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