Influence of electrolyte in transport and recombination in dye-sensitized solar cells studied by impedance spectroscopy
Influence of electrolyte in transport and recombination in dye-sensitized solar cells studied by impedance spectroscopy
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DOI：
10.1016/j.solmat.2004.07.017
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发表时间：
2005-05-01
影响因子：
6.9
通讯作者：
Hagfeldt, A
中科院分区：
文献类型：
--
作者：
Fabregat-Santiago, F;Bisquert, J;Hagfeldt, A
描述了染料敏化太阳能电池从开路到短路的各种电位条件下特性阻抗谱的主要特征。提出了一个等效电路模型，分别描述了电子输运、复合、积累和其他界面效应的参数。这些参数是在三种不同电解质的存在下，在黑暗中和照明下测定的。由于电解质组合物中的导带边缘的位移进行监测的传输电阻和电荷积累在TiO 2的变化。解释的电流-电位曲线特性，填充因子，开路光电势和效率在不同的条件下，与这种转变和复合电阻的功能。(c)2004 Elsevier B. V.保留所有权利。
The main features of the characteristic impedance spectra of dye-sensitized solar cells are described in a wide range of potential conditions: from open to short circuit. An equivalent circuit model has been proposed to describe the parameters of electron transport, recombination, accumulation and other interfacial effects separately. These parameters were determined in the presence of three different electrolytes, both in the dark and under illumination. Shift in the conduction band edge due to the electrolyte composition was monitored in terms of the changes in transport resistance and charge accumulation in TiO2. The interpretation of the current-potential curve characteristics, fill factor, open-circuit photopotential and efficiency in the different conditions, was correlated with this shift and the features of the recombination resistance. (c) 2004 Elsevier B.V. All rights reserved.