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    Amphiphilic POSS-based ionic liquid electrolyte additives as a boost for dye-sensitized solar cell performance

    Year: 2019

    Journal: Sol. Energy, Volume 183, 1-May, page 619–631

    Authors: Colovic, Marija; Volavsek, Janez; Stathatos, Elias; Korosin, Natasa Celan; Sobak, Matic; Jerman, Ivan

    Organizations: Slovenian Research AgencySlovenian Research Agency - Slovenia [P2-0393]; WABASELCOAT European project [C3330-17-500102]; RIS3 project under Western Greece Regional Strategy of Smart Specialisation [5021436]; European UnionEuropean Union (EU)

    Keywords: I-/I-3(-) electrolyte; PEO-POSS ionic liquid additives; Surface modifiers; DSSC

    A new approach to optimization of dye-sensitized solar cell, DSSC, performance, based on addition of POSS-based ionic liquid as an additive for I-/I-3(-) electrolyte systems is proposed. Iodide PEO-POSS Its are presented as conductive and thermally stable additives for DSSC electrolytes. Multifunctional M(EO)(n) Im(+)I(-) PIB7T8 POSS ILs with polyethylene oxide, PEO, chains of different lengths, n = 1-7 for M(PEG350), were synthesized, characterized and used as electrolyte additives for DSSCs, based on MPIm(+)I(-) or M(EO)(2)PIm(+)I(-)/butyronitrile electrolyte systems. The amphiphilic PEO ionic liquid-functionalized POSS molecules are considered as a potential POSS-based anodic surface modifier. The beneficial orientation of the PEO-POSS IL additive with the longest PEO chain at the anodic surface enabled a 7% increase in DSSC conversion efficiency. The positive influence of the additives' specific structure and anodic surface orientation on DSSC performance will be revealed in this research.
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