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New iodide-based amino acid molecules for more sustainable electrolytes in dye-sensitized solar cells

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Abstract

The electrolyte is the second key component governing at once the power conversion performances and the stability of dye-sensitized solar cells. Towards the integration of more sustainable materials, we have focused on the replacement of the major constituent of the electrolyte, namely the 1,3-di-alkyl imidazolium iodide. We synthesized two new iodide molecules derived from the natural amino acid L-proline: (S)-2-(methoxycarbonyl)-1,1-dimethylpyrrolidinium iodide (PMeI) and (S)-2-(ethoxycarbonyl)-1,1-ethylpyrrolidinium iodide (PEtI). In combination with the C106 polypyridyl ruthenium(+II) sensitizer, power conversion efficiencies of 7.1% for PMeI and 6.5% for PEtI were obtained under standard Air Mass 1.5G conditions in conjunction with the low-volatile 3-methoxypropionitrile-based solvent. The relationships between these iodide molecules with the power conversion efficiencies and the interfacial charge transfer processes are herein discussed, and the new iodide molecules are systematically compared to the best standard 1,3-di-methylimidazolium iodide.

Graphical abstract: New iodide-based amino acid molecules for more sustainable electrolytes in dye-sensitized solar cells

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Publication details

The article was received on 13 Nov 2017, accepted on 23 Jan 2018 and first published on 23 Jan 2018


Article type: Paper
DOI: 10.1039/C7GC03429F
Citation: Green Chem., 2018, Advance Article
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    New iodide-based amino acid molecules for more sustainable electrolytes in dye-sensitized solar cells

    I. Sagaidak, G. Huertas, A. Nguyen Van Nhien and F. Sauvage, Green Chem., 2018, Advance Article , DOI: 10.1039/C7GC03429F

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