Solar cells based on Cu2ZnSnS4/Cu2ZnSnSe4 thin film as composite photocathode
作者单位：School of Materials Science and Engineering China University of Mining and Technology School of Chemical Engineering and Technology China University of Mining and Technology
会议名称：《2016淮海绿色功能材料论坛暨第三届徐州清洁能源材料论坛》
会议日期：2016年
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
摘 要：Photoelectrochemical solar cells, especially dye-sensitized solar cells(DSSCs), have attracted considerable attention owing to their low cost, high efficiency and simple preparation process [1-2]. Typically, the standard DSSCs are single junction solar cells, which are fabricated with a sandwich structure including a dye-sensitized mesoporous semiconductor photoanode, an I/Iredox electrolyte and a catalytic counter electrode(CE) In this work, a solvothermal method was used to synthesize CuZnSnS(CZTS) and CuZnSnSe(CZTSe) nanoparticles. CZTS/CZTSe bilayer films have been fabricated via a layer-by-layer blade coating process on the fluorine dope tin oxide(FTO) substrates. We converted conventional dye-sensitized solar cells(DSSCs) into double junction photoelectrochemical solar cells with the replacement of the Pt-coated counter electrode with the as-prepared film as composite photocathode. Compared with conventional DSSCs, the cells shows an increased short circuit current and power conversion efficiency.