摘要/Abstract

设计合成了三种以树枝状和3D三苯胺衍生物为给体单元，苯甲酸为受体单元，苯并噻二唑（BT）或双氟苯并噻二唑（DFBT）作为第二受体单元的有机染料，系统研究了不同给体和第二受体单元对染料敏化剂的光物理性能、电化学性能和光伏性能的影响.以树枝状三苯胺衍生物为给体单元的有机染料具有较高的摩尔吸收系数，以3D三苯胺衍生物（IDTTPA）为给体单元的有机染料具有较宽的吸收光谱.基于三种有机染料的染料敏化太阳能电池分别获得了5.27%，4.22%和5.50%的能量转换效率.采用1 mmol·L^-1鹅去氧胆酸（CDCA）共吸附剂对电池进行优化后，三种染料的能量转换效率分别提升到5.46%，4.98%和6.26%.
关键词: 三苯胺, 苯并噻二唑, 有机染料, 光伏性能
Three organic dyes with dendritic and 3D triphenylamine derivatives as the donor unit, benzoic acid as the acceptor unit and benzothiadiazole (BT) or difluorobenzothiadiazole (DFBT) as the second acceptor were designed and synthesized. The influences of different donors and second acceptors on the photophysical, electrochemical and photovoltaic properties of dye-sensitizers were systematically investigated. The organic dye with dendritic triphenylamine derivative as a donor unit possesses a higher molar absorption coefficient, and the organic dye with 3D triphenylamine derivative (IDTTPA) as a donor unit has a broader absorption spectrum. The dye-sensitized solar cells based on three organic dyes achieved power conversion efficiencies of 5.27%, 4.22% and 5.50%, respectively. After optimizing the battery with 1 mmol·L^-1 co-adsorbent chenodeoxycholic acid (CDCA), the power conversion efficiencies of the organic dyes were increased to 5.46%, 4.98% and 6.26%, respectively.
Key words: triphenylamine, benzothiadiazole, organic dye, photovoltaic property


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