A methylene bridged bisimidazolium iodide based low-volatility electrolyte for efficient dye-sensitized solar cells

作者：Tai, Qidong^*; Bu, Chenghao; Chen, Bolei; Zhang, Nangang; Bai, Sihang; Hu, Hao; Xu, Sheng; Zhao, Xingzhong

来源：Journal of Renewable and Sustainable Energy, 2013, 5(4): 043121.

DOI：10.1063/1.4817733

• IONIC LIQUID ELECTROLYTES
• CHARGE RECOMBINATION
• DIFFUSION
• CATION
• TIO2

In this paper, we demonstrate that 1,10-methylene bis(3-n-methylimidazolium) diiodide (MMIDI) can be used as an excellent alternative iodide source to conventional lithium iodide (LiI) in electrolyte for dye-sensitized solar cell (DSSC). The MMIDI is cheaper and shows much improved physical and chemical stability compared to LiI. Noticeably, smaller charge transfer resistance for the reduction of triiodide and longer electron lifetime are found in the DSSCs based on MMIDI electrolyte, which result in a 23% higher overall conversion efficiency (5.26%) than that based on LiI electrolyte (4.27%). When the initial MMIDI electrolyte is optimized with functional additives, a promising 6.24% conversion efficiency is achieved.

• 出版日期2013-7-1
• 单位武汉大学