Abstract
Quasi-solid dye sensitized solar cells(Q-DSSC) were fabricated by employing gel electrolytes containing ionic liquids and gelators. Sufficient physical contacts between nano-crystalline TiO 2 particles and gel electrolytes in nano-porous TiO 2 layers were achieved by solidifying gel electrolyte precursors after the cells are filled with the electrolytes. Photocurrents increased largely by embedding carboxylic acids among dye molecules on TiO 2 crystals. The nano-porous TiO 2 electrolytes were fabricated by dipping the dye anchored TiO 2 substrates in dilute solutions of carboxylic acids. It was found that resistances in the TiO 2 layers decreased by these treatments.
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