期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 12, 期 45, 页码 15001-15006出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c004372a
关键词
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资金
- National Natural Science Foundation of China [50873055]
- National Key Basic Research and Development Program of China [2006CB806203, 2009CB930602]
The interface modification effect within quasi-solid dye-sensitized solar cells and the photovoltaic performance were investigated after the introduction of Mg(OOCCH3)(2) as an additive into a polymer gel electrolyte. Electrochemical impedance spectroscopy showed that the addition of Mg(OOCCH3)(2) into the polymer gel electrolyte can efficiently retard charge recombination at the TiO2/electrolyte interface. Mg(OOCCH3)(2) in the electrolyte can also contribute to the enhancement of the incident photon-to-electron conversion efficiency by modifying the dye molecules. This results in an improvement in the photovoltage and photocurrent due to a barrier layer at the TiO2/electrolyte interface and the promotion of charge injection at the dye/TiO2 interface, respectively. Photovoltaic measurements reveal that a conversion efficiency enhancement from 4.05% to 4.96% under 100 mW cm(-2) is obtained after the amount of Mg(OOCCH3)(2) added was optimized.
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