Investigation of Mechanisms of Enhanced Open-Circuit Photovoltage of Dye-Sensitized Solar Cells Based the Electrolyte Containing 1-Hexyl-3-Methylimidazolium Iodide  

作　　者：王森 张庆利 翁羽翔 林原 肖绪瑞 

机构地区：[1]Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 [2]Graduate School of Chinese Academy of Sciences, Beijing 100080 [3]Institute of Physics, Chinese Academy of Sciences, Beijing 100080

出　　处：《Chinese Physics Letters》2006年第3期724-727,共4页中国物理快报（英文版）

基　　金：Supported by the Major State Basic Research and Development Programme of China under Grant No G2000028205, the National High Technology Program of China under Grant No 2002AA302403, and the National Natural Science Foundation of China under Grant Nos 50221201 and 50473055.

摘　　要：The open-circuit photovoltage is improved by adding 1-hexyl-3-methylimidazolium iodide （HMImI） into the electrolyte. To investigate the mechanisms of the increase of the open-circuit photovoltage, we take the MottSchottky analysis and time-resolved mid-infrared absorption spectroscopy to study the band edge movement of TiO2 and the rate of back electron transfer, respectively. The results indicate that the negative shift of the conduction band of TiO2 is a predominant factor to increase the open-circuit photovoltage for the electrolyte containing HMImI,The open-circuit photovoltage is improved by adding 1-hexyl-3-methylimidazolium iodide （HMImI） into the electrolyte. To investigate the mechanisms of the increase of the open-circuit photovoltage, we take the MottSchottky analysis and time-resolved mid-infrared absorption spectroscopy to study the band edge movement of TiO2 and the rate of back electron transfer, respectively. The results indicate that the negative shift of the conduction band of TiO2 is a predominant factor to increase the open-circuit photovoltage for the electrolyte containing HMImI,

关 键 词：SPECTROSCOPY RECOMBINATION PERFORMANCE ENERGETICS 

分 类 号：O753.1[理学—晶体学]