Dye-sensitized solar cells with modified TiO2 surface chemical states: The role of Ti3+
Dye-sensitized solar cells with modified TiO2 surface chemical states: The role of Ti3+
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DOI：
10.1063/1.3660711
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发表时间：
2011-11
影响因子：
4
通讯作者：
Yang Yu;Kun-Lun Wu;Deliang Wang
中科院分区：
文献类型：
--
作者：
Yang Yu;Kun-Lun Wu;Deliang Wang
制备了具有不同表面化学状态的经修饰的TiO₂电极的染料敏化太阳能电池（DSSCs）。这些DSSCs具有超平的TiO₂电极，其上仅附着单层染料。电池的电流 - 电压（I - V）测量表明，Ti³⁺离子对电池性能有显著影响。结果显示，DSSC的效率与Ti³⁺表面态浓度密切相关，随着Ti³⁺浓度的增加，效率几乎呈线性下降。氧空位 - Ti³⁺缺陷充当电子复合中心，降低了开路电压和填充因子。
Dye-sensitized solar cells (DSSCs) with TiO2 electrodes, which were modified to have different surface chemical states, were fabricated. The DSSCs had an ultra-flat TiO2 electrode, on which only a mono-layer dye was attached. The cell I-V measurement showed that Ti3+ ion had a dramatic effect on cell performance. The efficiency of a DSSC was shown to have a strong correlation with the concentration of the Ti3+ surface state, it decreased almost linearly with increased Ti3+ concentration. The oxygen vacancy-Ti3+ defect served as electron recombination center and decreased both the open-circuit voltage and the fill factor.