染料敏化太阳电池染料协同敏化及其吸附机理  

Dyes Co-Sensitized and Adsorption Mechanism of Dye Sensitized Solar Cells

作　　者：陈许龙 张小萍 谢占婷 马元良[1] Chen Xulong;Zhang Xiaoping;Xie Zhanting;Ma Yuanliang(College of Physics and Electronic Infortmation Engineering,Qinghai University for Nationalities,Xining 810007,China)

机构地区：[1]青海民族大学物理与电子信息工程学院

出　　处：《微纳电子技术》2019年第9期709-714,760,共7页Micronanoelectronic Technology

基　　金：青海省科技计划项目（2017-ZJ-729)

摘　　要：提取了菠菜、藏红花、金银花、雪菊、山楂5种光谱吸收区间不同的植物染料,根据光谱吸收互补性的原则以不同类型、不同比例进行了混合,用于染料敏化太阳电池(DSSC)光阳极的协同敏化,测定了各种染料、染料与TiO2吸附后的UV-vis吸收光谱及不同染料敏化后的DSSC光电性能。实验结果表明:光谱吸收区间不同的染料混合后能有效拓宽光谱吸收范围和峰值吸光度,5种染料以相应比例协同敏化后的电池性能最佳,与单一染料敏化性能中最好的菠菜敏化电池相比,开路电压提升0.023V,短路电流提升0.342mA·cm^-2,光电转换效率提升0.94%(相比提升2.68倍)。最后从染料的有效色素类型与TiO2薄膜之间的吸附机理入手解释了造成几种染料电池光电性能差异的原因,从而提出了混合染料协同敏化DSSC应遵循的几项基本原则。Five kinds of plant dyes with different spectral absorption intervals were extracted from spinach,saffron,honeysuckle,snow chrysanthemum and hawthorn.They were mixed according to the principle of spectral absorption complementary in different types and different proportions for co-sensitization of the dye sensitized solar cell(DSSC)photo-anode.The UV-vis absorption spectra of various dyes,dyes and TiO2post-absorption,and the photoelectric properties of DSSCs after dye sensitization were measured.The experimental results show that the spectral absorption range and peak absorbance can be broadened after mixing the dyes with different spectral absorption intervals.The performance of the cell is optimal after synergistic sensitization with the five kinds of dyes in the corresponding proportions.Compared with the best spinach sensitized cell in single dye sensitization performances,the open-circuit voltage increases by 0.023 V,the shortcircuit current increases by 0.342 mA·cm^-2,the photoelectric conversion efficiency increases by 0.94%(2.68 times increase in contrast).Finally,from the adsorption mechanism between the effective pigment type of dyes and TiO2film,the reasons for the difference in photoelectric properties of several dye cells were explained,and several basic principles for mixed dye co-sensitized DSSCs were proposed.

关 键 词：染料敏化太阳电池(DSSC) 协同敏化 光电性能 吸附性 TIO2 

分 类 号：O644[理学—物理化学] TM914.4[理学—化学]