Transparent conductive oxide (TCO) layer-less dye sensitized solar cells (DSCs) are reported. The cell is composed of a glass substrate, TiO2 porous layer stained with dye molecules, porous Ti electrode, electrolyte, and a Pt sputtered Ti sheet. The cell exhibits an efficiency of 7.43% which was a little less than that of 8.44% for a DSC consisting of a TCO glass. The high efficiency was brought about by the thick and porous Ti electrode (200-300 nm thickness) which kept high conductivity and swift ionic diffusion. The preparation process for the Ti electrode is reported. (C) 2008 American Institute of Physics.
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