Efficient Hybrid Photovoltaic Devices Based on in-situ Electrochemical Copolymerization of 3-Methylthiophene and Bithiophene into Pores of Nanocrystalline TiO2  

作　　者：LU Sheng-li GENG Rui 

机构地区：[1]Institute for Organic Photovoltaic Materials and Devices, School of Biological and Chemical Engineering,Zhejiang University of Science and Technology, Hangzhou 310023, P.R.China [2]Department of Energy and Environmental System Engineering, School of Light Industry,Zhejiang University of Science and Technology, Hangzhou 310023, P.R.China [3]College of Chemical Engineering and Materials Science, Zhejiang University of Technology,Hangzhou 310014, P.R.China

出　　处：《Chemical Research in Chinese Universities》2013年第6期1208-1213,共6页高等学校化学研究（英文版）

基　　金：the National Natural Science Foundation of China

摘　　要：Novel organic and inorganic hybrid photovoltaic devices were thbricated by in-situ electrochemical copolymerization of 3-methylthiophene（3MT） and bithiophene（BT） into the pores of nanostructured TiO2 sintered on fluorine-doped tin oxide（FTO） substrate. The photoactive layer was investigated by Fourier transform infrared（FTIR） spectroscopy, ultraviolet-visable（UV-Vis） spectrometer, scanning electron microscope（SEM） and cyclic voltammo- gram characterization. Device efficiency based on different molar feed ratios of 3MT and BT during electrochemical polymerization, and the effect of in-situ copolymer state（doped by electrolyte and de-doped） were measured and compared. Under the solar illumination of 100 mW/cm2（AM 1.5）, an optimized device efficiency of 0.938% was obtained when the molar ratio of 3MT to BT was 500：1, polymerization time was 500 s and the system was in doped copolymer state, respectively. The mechanism of overall photovoltaic parameter improvement was discussed.Novel organic and inorganic hybrid photovoltaic devices were thbricated by in-situ electrochemical copolymerization of 3-methylthiophene（3MT） and bithiophene（BT） into the pores of nanostructured TiO2 sintered on fluorine-doped tin oxide（FTO） substrate. The photoactive layer was investigated by Fourier transform infrared（FTIR） spectroscopy, ultraviolet-visable（UV-Vis） spectrometer, scanning electron microscope（SEM） and cyclic voltammo- gram characterization. Device efficiency based on different molar feed ratios of 3MT and BT during electrochemical polymerization, and the effect of in-situ copolymer state（doped by electrolyte and de-doped） were measured and compared. Under the solar illumination of 100 mW/cm2（AM 1.5）, an optimized device efficiency of 0.938% was obtained when the molar ratio of 3MT to BT was 500：1, polymerization time was 500 s and the system was in doped copolymer state, respectively. The mechanism of overall photovoltaic parameter improvement was discussed.

关 键 词：In-situ electrochemical polymerization Hybrid photovoltaic device Photovoltaic characterization 

分 类 号：TQ326.6[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]