Performances improvement of eosin Y sensitized solar cells by modifying TiO_2 electrode with silane-coupling reagent  

作　　者：ZHOU YanFang LI XuePing ZHANG JingBo ZHOU XiaoWen LIN Yuan 

机构地区：[1]CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2009年第15期2633-2640,共8页

基　　金：Supported by the National Research Fund for Fundamental Key Project (Grant No. 2006CB202605);High-Tech Research and Development Program of China (Grant No. 2007AA05Z439);National Natural Science Foundation of China (Grant No. 20873162)

摘　　要：Chemical fixing of xanthene dye (eosin Y) on the surface of TiO2 electrode was carried out by modifying the electrode with silane-coupling reagent to obtain stable dye-sensitized TiO2 electrode. Such silane modification can not only evidently enhance the stability of dye-sensitized TiO2 electrode but also im-prove the energy conversion efficiency of the assembled cells by increasing short-circuit photocurrent (JSC) and open-circuit photovoltage (VOC). It was found that the improvements of cell performances differ depending on the composition of the electrolyte. The optimum cell of the cell performance was achieved in the electrolyte with 0.5 mol/L TBAI/0.05 mol/L I2/EC:PC(3:1 w/w), yielding JSC of 4.69 mA·cm?2, VOC of 0.595 V, fill factor (FF) of 0.64 and η of 1.78%. Different spectroscopic techniques including UV-Vis spectra, fluorescence spectra, EIS and dark current measurements were employed to derive reasonable analysis and explanations.Chemical fixing of xanthene dye （eosin Y） on the surface of TiO2 electrode was carried out by modifying the electrode with silane-coupling reagent to obtain stable dye-sensitized TiO2 electrode. Such silane modification can not only evidently enhance the stability of dye-sensitized TiO2 electrode but also improve the energy conversion efficiency of the assembled cells by increasing short-circuit photocurrent （Jsc） and open-circuit photovoltage （Voc）. It was found that the improvements of cell performances differ depending on the composition of the electrolyte. The optimum cell of the cell performance was achieved in the electrolyte with 0.5 mol/L TBAI/0.05 mol/L 12/EC：PC（3：1 w/w）, yielding Jsc of 4.69 mA. cm-2, Voc of 0,595 V, fill factor （FF） of 0.64 and ηof 1,78%, Different spectroscopic techniques including UV-Vis spectra, fluorescence spectra, EIS and dark current measurements were employed to derive reasonable analysis and explanations.

关 键 词：TiO2电极 硅烷偶联剂 太阳能电池 染料敏化 曙红Y 修改 表演 能量转换效率 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ264.12[化学工程—有机化工]