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Abstract Solid type dye-sensitized solar cell was fabricated using photodepositing polypyrrole onto the surface of porous TiO2 electrode anchored by photosensitizing molecules of a ruthenium complex. Polypyrrole in the porous medium successfully works as hole transport layer connecting the sensitizer dye molecules to a counter electrode. Doping density of the polypyrrole conducting layer was optimized to improve the efficiency of the system.
Murakoshi et al. (Thu,) studied this question.