Effect of pH Value on the Properties of SnO<sub>2</sub> Nano-Cystalline for Dye Sensitized Solar Cells

Abstract

The study of dye-sensitized solar cells (DSCs) based on nanocrystalline films of high band gap semiconductors is a progressive field of research that is being carried out by scientists in a wide range of laboratories. To improve the conversion efficiency of the DSCs, the SnO 2 nanorots photocurrent is prepared via the hydrothermal method, and characterized by XRD, FESEM, BET and Absorption spectrum. Though analysis the results, the conclusion is shown the pure SnO 2 is preparation, the SnO 2 nanocrystalline both shows the single phase that SnO 2 from the sule solution to kalin solution. The prepared SnO 2 nanocrystalline under pH=3 shows the particle-shape crystalline, the surface area of SnO 2 nanocrystalline is 86.3412m 2 /g. The prepared SnO 2 nanocrystalline under pH=7 shows the short rod-shape crystalline, the surface area of SnO 2 nanocrystalline is 58.3408m 2 /g. The absorbance of SnO 2 nanocrystalline shows the strong absorption in the ultraviolet ray range, the absorbance of synthesized SnO 2 nanocrystalline under pH=11 shows the highest value.