On the origin of increased open circuit voltage of dye-sensitized solar cells using 4-tert-butyl pyridine as additive to the electrolyte

被引:94
作者
Duerr, M. [1 ]
Yasuda, A. [1 ]
Nelles, G. [1 ]
机构
[1] Sony Deutschland GmbH, Mat Sci Lab, D-70327 Stuttgart, Germany
关键词
D O I
10.1063/1.2266386
中图分类号
O59 [应用物理学];
学科分类号
摘要
A combination of electrical measurements and surface analysis techniques was used to investigate the electronic structure of the TiO2/electrolyte interface and its change upon addition of 4-tert-butyl pyridine to the electrolyte. A reduced interface defect density and a resulting reduction of charge carrier recombination were found to be the main mechanism for an increased open circuit voltage of dye-sensitized solar cells with 4-tert-butyl pyridine in the electrolyte. The reduction of interface defect states was traced back to specific binding of 4-tert-butyl pyridine at defect sites on the TiO2 surface. (c) 2006 American Institute of Physics.
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页数:3
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