Preparation of Nanosize Anatase TiO_2 by A Simple, Low-cost Method and Their Performance in Dye Sensitized Solar Cells

摘要

The critical material of photo-anode, the TiO_2 nano-particles, as the most important component in dye sensitized solar cells (DSSCs) was studied in this paper. The TiO_2 nano-particles were prepared by the method of micro-emulsion. In the process of preparation, the factors including the kinds of surfactant, and the molar ratio of water to titanium (R value) were investigated. Finally, the optimal condition for the preparation of the TiC>2 nano-particles was determined. When Tx-100 was used as the surfactant and R was 35, the TiO_2 nano-particles were prepared and used as photo-anode in the DSSCs, which were sensitized by N719, test under AM1.5G sunlight. The highest photoelectric conversion efficiency was achieved: Short-circuit photocurrent (Isc) =13.91mA/cm~2, open-circuit photo voltage (Voc) =0.83V, fill factor (FF) =55.06%, photoelectric conversion efficiency (η) =6.36%.