Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1523410 | Materials Chemistry and Physics | 2012 | 5 Pages |
Ti1−xSnxO2 nanocrystals were successfully synthesized by using a simple solvothermal route, and its band energy gap broaden and flat band potential can be rationally regulated with increasing x value. Furthermore, Ti1−xSnxO2 nanocrystals were first used as the photoelectrode material for dye-sensitized solar cells. A cell made of Ti1−xSnxO2 (x = 0.3) exhibited the best photovoltaic performance. This is due to its most narrow band gap energies, most negative flat band potential and lowest dark current densities. After the surface of Ti1−xSnxO2 (x = 0.3) electrode was treated with TiCl4 solution, the cell sensitized by a mixed solution of N719 and D131 dye exhibited the best efficiency of 4.64% under the illumination of 1 sun (AM1.5, 100 mW cm−2).
► Ti1−xSnxO2 nanocrystals were used as an electrode for dye-sensitized solar cells. ► The efficiency can be improved obviously after the electrode was treated with TiCl4. ► The best efficiency of 4.64% was obtained using a mixed solution of N719 and D131.