An alternative alkylpyridinium iodide with high electroactivity for efficient dye-sensitized solar cells

作者：Hao, Feng; Lin, Hong^*; Liu, Yizhu; Li, Jianbao

来源：Electrochemistry Communications, 2011, 13(6): 550-553.

DOI：10.1016/j.elecom.2011.03.007

• Alkylpyridinium iodide
• Electroactivity
• Diffusion coefficient
• Electron diffusion length
• Dye-sensitized solar cells

Alkyl-substituted pyridinium iodide has been applied as alternative iodide source in dye-sensitized solar cells (DSCs), featuring impressively high diffusivity and electroactivity. Encouraging energy conversion efficiency up to 8.23% was achieved, implying that this alkylpyridinium iodide serves as an effective alternative iodide source for DSCs. The intensity-modulated photocurrent/photovoltage spectroscopy measurements further indicated that the electron diffusion coefficient was considerably enhanced in device with pyridinium iodide electrolyte in comparison with that of the conventional imidazolium iodide, which was primarily due to a more shallow distribution of the surface trap states after the adsorption of pyridinium cations on the TiO2 electrode surface.

• 出版日期2011-6
• 单位海南大学; 清华大学; 新型陶瓷与精细工艺国家重点实验室