A Silicon-based Imidazolium Ionic Liquid Iodide Source for Dye-Sensitized Solar Cells |
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| Authors: | Wenjun Wu Xiaoyu Zhang Yue Hu Bin Jin Jianli Hua |
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| Institution: | Key Labs for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, China |
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| Abstract: | Room temperature molten salt 1‐methyl‐3‐(trimethylsilyl)methyl‐imidazolium iodide (MSII) was used for iodide sources in dye‐sensitized solar cells with an organic sensitizer 2‐cyano‐3‐5‐4‐3‐4‐(4‐(N,N‐bis(4‐methoxyphenyl)amino)phenyl)phenyl]‐2,5‐di‐n‐butyl‐pyrrolo3,4‐c]pyrrole‐1,4‐dione]phenyl]furan‐2‐yl] acrylic acid (DPP‐I) as light harvester. With an optimized electrolyte (MSII:I2:BI:GuNCS?24:2:2:0.4, BI and GuCNS are short for benzimidazole and guanidine thiocyanate, respectively), photovoltaic parameters (Jsc, Voc, and ff) of device are 8.97 mA·cm?2, 600 mV and 0.61, respectively, yielding a maximum overall photo‐to‐energy conversion ef?ciency (η) of 3.23%. And then the charge‐transfer mechanism of devices was deeply analyzed with electrochemical impedance spectroscopy (EIS) in the dark. |
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| Keywords: | dye-sensitized solar cells iodide sources silicon-based ionic liquid |
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