Determination of rate constants for charge transfer and the distribution of semiconductor and electrolyte electronic energy levels in dye-sensitized solar cells by open-circuit photovoltage decay method
Determination of rate constants for charge transfer and the distribution of semiconductor and electrolyte electronic energy levels in dye-sensitized solar cells by open-circuit photovoltage decay method
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DOI：
10.1021/ja047311k
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发表时间：
2004-10-20
影响因子：
15
通讯作者：
Mora-Seró, I
中科院分区：
文献类型：
--
作者：
Bisquert, J;Zaban, A;Mora-Seró, I
将纳米粒子中的电子寿命测量与势标度中高分辨率的费米能级位置的函数相结合，并使用描述这种依赖性的新模型，为研究染料敏化太阳能电池中控制复合的微观过程和参数提供了强大的工具。该模型预测电子寿命对开路电压的依赖性分为三个域，这与实验结果非常吻合：高光电压下的恒定寿命，与自由电子有关；由于内部捕获和去捕获以及低光电压下的倒置抛物线而导致的指数增加，对应于受体电解质物质水平的密度，包括马库斯倒置区域。
A combination of electron lifetime measurement in nanoparticles as a function of the Fermi level position at high resolution in the potential scale with a new model to describe this dependence provides a powerful tool to study the microscopic processes and parameters governing recombination in dye-sensitized solar cells. This model predicts a behavior divided in three domains for the electron lifetime dependence on open-circuit voltage that is in excellent agreement with the experimental results: a constant lifetime at high photovoltage, related to free electrons; an exponential increase due to internal trapping and detrapping and an inverted parabolla at low photovoltage that corresponds to the density of levels of acceptor electrolyte species, including the Marcus inverted region.