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《中国科学:化学(英文版)》 2013-06
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Photoelectrochemical performance of a sub-micron structured film with poly(3-methylthiophene) (P3MT)-modified CdTe/ZnO shell–core sub-micron tube arrays

HAO YanZhong 1* , LUO Chong 1 , SUN Bao 1 , SUN Shuo 1 , LI YingPin 1 , SHEN ShiGang 2 & XU DongSheng 3 1 College of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China 2 College of Chemistry and Environmental Science, Key Laboratory of Medical Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China 3 Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China  
A sub-micron structured film with a poly(3-methylthiophene) (P3MT)-modified CdTe/ZnO shell-core sub-micron tube array has been prepared by a series of electrodeposition processes, and a semiconductor-sensitized solar cell based on this structure was also fabricated. Vertically oriented ZnO sub-micron tubes were obtained on an indium tin oxide (ITO) substrate, and then CdTe nanocrystals and a thin P3MT layer were electrodeposited sequentially onto the walls of the ZnO sub-micron tubes. A suitable thickness of CdTe and P3MT could improve the photovoltaic properties of the solar cell, which was attributed to the enhancement in the light absorption and the decrease in the recombination of photogenerated carriers. In addition, a p–n heterojunction formed between the interface of CdTe and P3MT played an important part in the efficient separation and fast transport of photogenerated carriers in the sub-micron structure. A power conversion efficiency of 1.20% was obtained with this type of solar cell.
【Fund】: supported by the National Natural Science Foundation of China (NSFC Grant nos. 21173065 20573031);; the Ministry of Science and Technology of China (MSTC Grant no. 2011CB808702);; the Natural Science Foundation of Hebei Province of China (Grant no.B2010000856)
【CateGory Index】: O631.3
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