| Explanation of Effect of Added Water on Dye-Sensitized Nanocrystalline TiO2 Solar Cell： Correlation between Performance and Carrier Relaxation Kinetics |
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| 引用本文： | 赵慧,殷雄,李恒,林原,翁羽翔.Explanation of Effect of Added Water on Dye-Sensitized Nanocrystalline TiO2 Solar Cell： Correlation between Performance and Carrier Relaxation Kinetics[J].中国物理快报,2007,24(11):3272-3275. |
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| 作者姓名： | 赵慧 殷雄 李恒 林原 翁羽翔 |
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| 作者单位： | [1]Laboratory of Soft Matter Physics, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 [2]Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 |
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| 基金项目： | Supported by the Knowledge Innovative Project of Chinese Academy of Sciences under Grant No KJCX2-SW-w29, and the National Natural Science Foundation of China under Grant Nos 60321003 and 60438020. |
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| 摘 要： | Time-resolved mid-IR transient absorption spectroscopy is employed to explore the mechanism of improving the performance of dye-sensitized TiO2 solar cell （DSSC） when a certain amount of H2 0 is added into the electrolyte. The relaxation kinetics of dye-sensitized TiO2 nanocrystalline film and the corresponding DSSC performance are investigated under different conditions. It is found that the interracial charge recombination is retarded and electron injection efficiency is increased in the water vapour and in the electrolyte when D20 is added. The values of open-circuit photovoltage Voc and the short-circuit photocarrent Jsc of the cells are linearly correlated to the product of the two decay time constants. We also observed that Voc well correlates with electron injection efficiency. It provides a preliminary microscopic account for the function of the added water in improving the performance of DSSCs.
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| 关 键 词： | 纳米水晶 氧化硅 载流子 动力学 |
| 收稿时间： | 2007-04-03 |
Explanation of Effect of Added Water on Dye-Sensitized Nanocrystalline TiO2 Solar Cell: Correlation between Performance and Carrier Relaxation Kinetics |
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| ZHAO Hui,YIN Xiong,LI Heng,LIN Yuan,WENG Yu-Xiang.Explanation of Effect of Added Water on Dye-Sensitized Nanocrystalline TiO2 Solar Cell: Correlation between Performance and Carrier Relaxation Kinetics[J].Chinese Physics Letters,2007,24(11):3272-3275. |
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| Authors: | ZHAO Hui YIN Xiong LI Heng LIN Yuan WENG Yu-Xiang |
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| Institution: | Laboratory of Soft Matter Physics, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | Time-resolved mid-IR transient absorption spectroscopy is employed to explore the mechanism of improving the performance of dye-sensitized TiO2 solar cell (DSSC) when a certain amount of H2O is added into the electrolyte. The relaxation kinetics of dye-sensitized TiO2 nanocrystalline film and the corresponding DSSC performance are investigated under different conditions. It is found that the interfacial charge recombination is retarded and electron injection efficiency is increased in the water vapour and in the electrolyte when D2O is added. The values of open-circuit photovoltage Voc and the short-circuit photocurrent Jsc of the cells are linearly correlated to the product of the two decay time constants. We also observed that Voc well correlates with electron injection efficiency. It provides a preliminary microscopic account for the function of the added water in improving the performance of DSSCs. |
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| Keywords: | 82 80 Fk 78 47 +p 79 60 Jv |
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