Fabrication and Characterization of CuInS2 Sensitized TiO2 Electrodes Based on Improved SILAR Process
CuInS2 quantum dots have been deposited onto mesoporous TiO2 films on TCO glass substrate via successive ionic layer absorption and reaction process (SILAR) by using three different routes and post-deposition annealing in sulfur ambiance.The influence of the deposition sequence of the In-S and Cu-S on the microstructure of CuInS2 sensitized TiO2 electrodes and the photovoltaic performance of the solar cells have been investigated.The microstructure of CuInS2 sensitized TiO2 electrodes has been investigated by using X-ray diffraction (XRD),Raman spectra,scanning electron microscopy (SEM),and energy dispersive spectroscopy (EDS) analysis.The optical absorption property of the electrodes has been detected by using UV-Vis spectroscopy,and the photovoltaic performance of CuInS2 quantum dots sensitized solar cells has been determined by cyclic voltammetry measurement.It has been found that when the Cu-S was deposited prior to In-S,the chalcopyrite phase CuInS2 could not be observed due to the sublimation of InxS during the annealing under low pressure.A small amount of CuInS2 has been detected when In-S and Cu-S was deposited alternately onto the TiO2 films.However,chalcopyrite phase CuInS2 can be obtained when In-S was deposited prior to Cu-S,and a relative high efficiency of ca.0.92% (Voc = 0.35V,Jsc = 8.49 mA·cm-2,FF = 0.31) has been achieved via SILAR without KCN treatment and rapid thermal annealing.
CuInS2 quantum dots Solar cells SILAR Deposition sequence TiO2 electrodes
Fengjiao Mei Qingcui Wan An Ping Hua Liao Xueqing Xu Jifu Shi Gang Xu
Solar Energy Research Institute, Yunnan Normal University, Kunming, China;Key Laboratory of Renewabl Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chines Solar Energy Research Institute, Yunnan Normal University, Kunming, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
478-484
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）