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Structure–Function Relationships in Unsymmetrical Zinc Phthalocyanines for Dye-Sensitized Solar Cells

机译:染料敏化太阳能电池中不对称锌酞菁中的结构-功能关系

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摘要

A series of unsymmetrical zinc phthalocyanines bearing an anchoring carboxylic function linked to the phthalocyanine ring through different spacers were designed for dye-sensitised solar cells (DSSC). The modification of the spacer group allows not only a variable distance between the dye and the nanocrystalline TiO2, but also a distinct orientation of the phthalocyanine on the semiconductor surface. The photovoltaic data show that the nature of the spacer group plays a significant role in the electron injection from the photo-excited dye into the nanocrystalline TiO2 semiconductor, the recombination rates and the efficiency of the cells. The incident monochromatic photon-to-current conversion efficiency (IPCE) for phthalocyanines bearing an insulating spacer is as low as 9%, whereas for those with a conducting spacer an outstanding IPCE 80% was obtained.
机译:为染料敏化太阳能电池(DSSC)设计了一系列带有锚定羧基官能团的不对称锌酞菁锌,它们通过不同的间隔基连接到酞菁环上。间隔基团的修饰不仅允许染料与纳米晶体TiO2之间的距离可变,而且还允许酞菁在半导体表面上的不同取向。光伏数据显示,间隔基团的性质在从光激发染料向纳米晶TiO2半导体的电子注入,重组率和电池效率中起着重要作用。带有绝缘垫片的酞菁的入射单色光子-电流转换效率(IPCE)低至9%,而对于带有导电垫片的酞菁,则获得了出色的IPCE 80%。

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