论文信息 - Improvement of efficiency of dye-sensitized solar cells by reduction of internal resistance

Improvement of efficiency of dye-sensitized solar cells by reduction of internal resistance

In order to elevate conversion efficiency, the series-internal resistance of dye-sensitized solar cells (DSCs) was investigated with electrochemical impedance spectroscopy measurement based on an equivalent circuit of DSCs. It was found that series-internal resistance correlates negatively with the roughness factor of the platinum counter electrode and positively with the thickness of the electrolyte layer. A cell sensitized with a black dye with series-internal resistance of 1.8 /spl Omega/cm/sup 2/ was fabricated and showed conversion efficiency of 10.2%, which was confirmed at the National Institute of Advanced Industrial Science and Technology (AIST, Japan).

[1] Takehito Mitate,et al. Modeling of an equivalent circuit for dye-sensitized solar cells , 2004 .

[2] Joachim Luther,et al. Modeling and interpretation of electrical impedance spectra of dye solar cells operated under open-circuit conditions , 2002 .

[3] K. Sasaki,et al. Impedance Analysis of Electronic Transport in Dye-sensitized Solar Cells , 2002 .

[4] M. Grätzel. Dye-sensitized solar cells , 2003 .

[5] Hironori Arakawa,et al. Highly efficient photon-to-electron conversion with mercurochrome-sensitized nanoporous oxide semiconductor solar cells , 2000 .

[6] M. Grätzel. Mesoporous oxide junctions and nanostructured solar cells , 1999 .

[7] Naoki Koide,et al. Measuring methods of cell performance of dye-sensitized solar cells , 2004 .

[8] M. Grätzel,et al. A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films , 1991, Nature.

[9] Mohammad Khaja Nazeeruddin,et al. Conversion of light to electricity by cis-X2bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) charge-transfer sensitizers (X = Cl-, Br-, I-, CN-, and SCN-) on nanocrystalline titanium dioxide electrodes , 1993 .

[10] P. Liska,et al. Engineering of efficient panchromatic sensitizers for nanocrystalline TiO(2)-based solar cells. , 2001, Journal of the American Chemical Society.