Synthesis and Mechanistic Studies of Organic Chromophores with Different Energy Levels for p-Type Dye-Sensitized Solar Cells
Synthesis and Mechanistic Studies of Organic Chromophores with Different Energy Levels for p-Type Dye-Sensitized Solar Cells
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p型染料敏化太阳能电池不同能级有机发色团的合成及机理研究
DOI：
10.1021/jp911091n
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发表时间：
2010-03-18
影响因子：
3.7
通讯作者：
Sun, Licheng
中科院分区：
文献类型：
--
作者：
Qin, Peng;Wiberg, Joanna;Sun, Licheng
为p型染料敏化太阳能电池设计并合成了一系列具有不同吸电子基团的给体-受体染料。染料结构的修饰对染料的光物理、电化学和光电性能有显著的影响。基于这些染料的DSSCs显示出最大63%和最小6%的入射单色光子到电流的转换效率。利用飞秒瞬态吸收光谱对效率最高（P1）和最低（P3）的两种染料进行了研究，结果表明，两种染料的快速注入速度均大于（250 fs）（-1）。这样的快速注入相当于90%以上的注入效率。在电解液存在下敏化NiO膜的光诱导吸收光谱研究表明，由于动力不足，113的再生能力较差。这一点，加上染料在NiO薄膜上的聚集，解释了太阳能电池性能差的原因。
A series of donor-pi-acceptor dyes with different electron-withdrawing groups were designed and synthesized for p-type dye-sensitized Solar cells. The modification of dye structures shows significant influence on the photophysical, electrochemical, and photovoltaic performance of the dyes. DSSCs based on these dyes show maximum 63% and minimum 6% of incident monochromatic photon-to-current conversion efficiencies. The two dyes with the highest (P1) and lowest (P3) efficiencies were Studied by femtosecond transient absorption spectroscopy, which shows a fast injection rate of more than (250 fs)(-1) for both dyes. Such fast injection corresponds to more than 90% injection efficiency. The photoinduced absorption Spectroscopy Study of sensitized NiO films in the presence of electrolyte showed poor regeneration of 113 due to all insufficient driving force. This, together with aggregation of the dye on the NiO film, explained the poor solar cell performance.