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Pyridinium-clubbed dicationic ionic liquid electrolytes for efficient next-generation photo harvesting

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Abstract

We have developed a new series of pyridinium based dicationic ionic liquids (DCILs) having excellent thermal stability and good ionic conductivity. The effectiveness of these DCIL based electrolytes in photovoltaic devices and the effect of different anions (e.g. iodine, bromide, and thiocyanate) versus the device performance are studied by cyclic voltammetry (CV), current–voltage (IV) characteristics and electrochemical impedance spectroscopy (EIS). The electrolyte 2PrSCN based device C exhibited the highest photo conversion efficiency (PCE) of 5.23% under 1 sun (100 mW cm−2) illumination of light. We have also analyzed the influence of various anions in metal-free dye-sensitized TiO2 and the DCIL interface using the EIS technique. Device C based on 2PrSCN shows excellent long-term stability, maintaining <95% of the initial efficiency after 500 h.

Graphical abstract: Pyridinium-clubbed dicationic ionic liquid electrolytes for efficient next-generation photo harvesting

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Publication details

The article was received on 19 Jan 2018, accepted on 19 Mar 2018 and first published on 19 Mar 2018


Article type: Paper
DOI: 10.1039/C8NJ00330K
Citation: New J. Chem., 2018, Advance Article
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    Pyridinium-clubbed dicationic ionic liquid electrolytes for efficient next-generation photo harvesting

    A. Dhar, N. S. Kumar, M. Asif and R. L. Vekariya, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ00330K

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