Details

Autor(en) / Beteiligte

• Fang, Yanyan
• Ma, Pin
• Cheng, Hongbo
• Tan, Guoyu
• Wu, Jiaxin
• Zheng, Jiaxin
• Zhou, Xiaowen
• Fang, Shibi
• Dai, Yuhua
• Lin, Yuan

Titel

Synthesis of Low‐Viscosity Ionic Liquids for Application in Dye‐Sensitized Solar Cells

Ist Teil von

• Chemistry, an Asian journal, 2019-12, Vol.14 (23), p.4201-4206

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Two types of ionic liquids (ILs), 1‐(3‐hexenyl)‐3‐methyl imidazolium iodide and 1‐(3‐butenyl)‐3‐methyl imidazolium iodide, are synthesized by introducing an unsaturated bond into the side alkyl chain of the imidazolium cation. These new ionic liquids exhibit high thermal stability and low viscosity (104 cP and 80 cP, respectively). The molecular dynamics simulation shows that the double bond introduced in the alkane chain greatly changes the molecular system space arrangement and diminishes the packing efficiency, leading to low viscosity. The low viscosity of the synthesized ionic liquids would enhance the diffusion of redox couples. This enhancement is detected by fabricating dye‐sensitized solar cells (DSSCs) with electrolytes containing the two ILs and I2. The highest efficiency of DSSCs is 6.85 % for 1‐(3‐hexenyl)‐3‐methyl imidazolium iodide and 5.93 % for 1‐(3‐butenyl)‐3‐methyl imidazolium iodide electrolyte, which is much higher than that of 5.17 % with the counterpart 1‐hexyl‐3‐methyl imidazolium iodide electrolyte. Two types of ionic liquids, HeMII and BeMII, with low viscosity are synthesized and the best efficiency of dye‐sensitized solar cells (DSSCs) with these ionic liquids is 6.85 % and 5.93 %, respectively.