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CdSe敏化TiO₂纳米晶多孔膜电极的制备及其光电性能研究

Preparation and photoelectrochemical performance of CdSe dots sensitized nanocrystalline TiO₂ film electrode

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【Author】 ZHANG Han-ping~(1,2),LIN-yuan~2,ZHOU Xiao-wen~2,WANG Zheng-ping~1,ZHANG Bao-hong~1(1.College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;2.Key Laboratory of Photochemistry,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China)

【机构】哈尔滨工程大学材料科学与化学工程学院；中国科学院化学研究所分子科学中心光化学重点实验室；哈尔滨工程大学材料科学与化学工程学院黑龙江哈尔滨150001；北京100080；黑龙江哈尔滨150001；

【摘要】研究了CdSe敏化TiO2纳米晶多孔薄膜电极的制备及其表征,采用涂敷法将溶胶-凝胶法制备的TiO2胶体制备成纳米晶多孔薄膜,采用化学沉积法制备的CdSe对其进行了敏化处理。敏化后增加了对可见光的吸收作用和光生载流子的输运速度,减少了CdSe上光生载流子的复合,改善了电极内光生电荷的传递特性,获得了较大的稳态光电流。这种薄膜电极改进后可用于制作敏化太阳能电池的光阳极。更多还原

【Abstract】 The preparation and characterization of CdSe dots sensitized nanocrystalline TiO₂ film electrode were studied.The porous TiO₂ film was prepared by Doctor-blade method with TiO₂ paste synthesized by sol-gel method.The TiO₂/CdSe composite films were characterized with SEM and UV-Vis spectra.The composite films absorbed more visible light and had photoelectron transfer rate,it reduced charge recombination losses which lead to a substantial improvement on the photocurrent.The composite films can be used photoelectrode after some improvement of the films.更多还原