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《Journal of Synthetic Crystals》 2014-01
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Preparation of Nano-TiO_2 Solar Cell by Using Natural Dye from Henna Flower as Sensibilizer

HAO Hong-shun;YANG Yang;QIN Lei;WANG Li-jun;HU Zhi-qiang;LIU Gui-shan;Institute of New Energy Material,Dalian Polytechnic University;National Engineering Research Center of Seafood,Dalian Polytechnic University;  
Nano-TiO2solar cell was prepared using natural dye from henna flower as sensibilizer. Natural dye was extracted with ethanol as extracting solvent. The main components of that were confirmed by high-performance liquid chromatography-diode array detection( HPLC-DAD). Ultraviolet-visible( UVVis) absorption spectra of henna flower dye under different pH value were tested. Photoelectric properities of nano-TiO2solar cell by using natural dye of different pH value as sensibilizer were analysized. The results showed component of natural dye contain lawsone,luteolin,apigenin,chlorophyll a and carotenoid. Ethanol extracting liquid under different pH value were tested by ultraviolet-visible( UV-Vis) absorption spectra. Dye-sensitized solar cells( DSSCs) were sensitized from henna flower pigments with ethanol as extracting solvent under different pH value. These absorption peaks of 340 nm,420 nm,470 nm and 670 nm were found under neutrality condition( original pH value). The red shift and increased density of UV-Vis absorption peak were attributed to structural change of lawsone,luteolin and apigenin under alkaline condition. Chlorophyll a,with absorption peak of 420 nm and 670 nm, turned to phoeophytin under acidic condition. According to experimental results, the conversion efficiency of nano-TiO2solar cell prepared by using henna flower dye pigments extracted with ethanol as extracting solvent under pH = 5 was 0. 15%,with open-circuit voltage of 0. 39 V,short-circuit current density of 0. 66 mA·cm- 2,fill factor of 0. 60,and IPCE of 1. 7% at 400 nm.
【Fund】: 国家科技支撑计划(2011BAB03B05);; 辽宁省教育厅科技研究项目(L2011078);; 住房和城乡建设部科学技术项目计划(2013-K4-8);; 大连市科技平台建设(2010-354)
【CateGory Index】: TM914.4
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1 ZHANG Wei-Bing;WANG Zhi-Cong;ZHANG Ling-Yi;School of Chemistry and Molecular Engineering,East China University of Science and Technology;;Determination of 10 Caffeoylquinic Acids and 22 Flavonoids in Chrysanthemum Samples by Ultra-high Performance Liquid Chromatography-Diode Array Detection-Tandem Mass Spectrometry[J];Chinese Journal of Analytical Chemistry;2013-12
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