Efficiency Enhancement of Dye-Sensitized Solar Cells: Using Salt CuI as an Additive in an Ionic Liquid

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2007,（2）
• 页码范围: 555-558
• 页数: 4页
• 语种: 英文

摘要

Energy conversion efficiency of the dye-sensitized solar cell is improved from 3.5% to 4.5% by adding a small amount of CuI into an ionic liquid electrolyte. It is found that other copper-I salts, for example, CuBr, have the same effect for the dye-sensitized solar cell. Experimental results show that no Cu2+ ions exist in this electrolyte.It is suggested that this improvement is caused by the adsorption of Cu+ onto the TiO2 porous film.