9 October 2009 Highly efficient dye-sensitized solar cells
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Abstract
The present paper discusses the strategy for improvement of efficiency of dye-sensitized solar cells based the equivalent circuit model. The influence of these elements upon cell efficiency in areas such as short circuit current density (JSC), open circuit voltage (VOC), and fill factor (FF) was examined. It was demonstrated that the haze factor of TiO2 electrodes is a useful index when fabricating light-confined TiO2 electrodes to improve JSC, and that blocking the TiO2 surface with molecules is an effective way of reducing interfacial charge recombination at the TiO2 surface and of improving shunt resistance and VOC. FF was also improved by reduction of the internal series resistance, which is composed of the redox reaction resistance at the platinum counter electrode, the resistance of carrier transport by ions in the electrolyte, and resistance due to the sheet resistance of the transparent conducting oxide. Finally, the highest efficiency scores of 11.1% and 10.4% (aperture illumination area of 0.219cm2 and 1.004cm2, respectively) were confirmed by a public test center.
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Liyuan Han, Liyuan Han, Ashraful Islam, Ashraful Islam, } "Highly efficient dye-sensitized solar cells", Proc. SPIE 7416, Organic Photovoltaics X, 74160X (9 October 2009); doi: 10.1117/12.829181; https://doi.org/10.1117/12.829181
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