天然色素染料敏化的太阳电池性能

Performances of the Dye-Sensitized Solar Cell with Natural Pigment Dyes

利用黑米、辣椒的植物染料分子及其混合的染料分别敏化了TiO2薄膜电极,制备出太阳能光化学电池。测试发现黑米的染料分子与TiO2膜有相互键合作用,使吸收峰值从568 nm移动到599 nm;黑米、辣椒及其混合时的染料在TiO2膜上的吸收曲线比在乙醇溶液中的吸收曲线平缓;混合染料敏化电池的最大输出功率为1.524 mW,黑米色素和辣椒色素单独敏化电池的最大输出功率分别为1.248和0.229 mW,表明混合染料敏化电池效能超过两种染料分别敏化时电池效能的线性叠加,混合染料的同时敏化效应有利于提高电池的转化效率。

The TiO2 film electrodes were sensitized by the black rice dye molecule,chilli dye molecule and the mixture of them,respectively,and the photochemical solar cells were prepared.The test result shows that the bonding interaction exists between the black rice dye molecule and the TiO2 film,so that the absorption peak shifts from568 nm to 599 nm.The absorption curves of the black rice dye,chilli dye and the mixture of them in the TiO2 films are gentle than those in the ethanol solution.The maximum output power of the cell sensitized by the mixed dye is1.524 mW.The maximum output powers of the cells sensitized by the black rice pigment and chilli pigment are 1.248 and 0.229 mW,respectively.It shows that the efficiency of the cell sensitized by the mixed dye exceeds the efficiency linear superposition of the cells sensitized by the black rice and chilli dyes.The mixed dye sensitized effect is helpful to improve the conversion efficiency of the solar cells.