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    Long-Term Stability of Dye-Sensitized Solar Cells Assembled with Cobalt Polymer Gel Electrolyte

    Year: 2017

    Journal: J. Phys. Chem. C, Volume 121, AUG 24, page 17577–17585

    Authors: Sonai, Gabriela G.; Tiihonen, Armi; Miettunen, Kati; Lund, Peter D.; Nogueira, Ana F.

    Organizations: FAPESP [2013/18106-0]; CNPq [202895/2015-7, 201274/2016-7]; Academy of Finland [271081, 253643]

    The long-term stability of a-dye-sensitized solar cell (DSSC) is a key issue for upscaling and commercialization of this technology. It is well-known that gel electrolytes cars improve the long-term stability and allow easy DSSC manufacturing. Howeyet, there is limited knowledge on the long-term stability of cobalt-based gel electrolytes and also how this. stability is affected-when applying different dye sensitizers. Moreover, long-term stability studies have been done with no, or an imperfect, Iri this work we investigated the performance and the stability of,cobalt-based polymer gel electrolytes Using devices properly sealed. Here, two different dyes, an organic and a ruthenium dye, were selected to investigate the device's performance. The cobalt liquid electrolyte was gelled with a PEO-based- terpolymer (PEO-EM-AGE) and compared to its liquid counterpart. After 1000 h, the efficiencies of the liquid- and-gel-based solar cells with the ruthenium dye were statistically similar to each other. On the other hand, the DSSCs using the organic dye performed similarly by stati tical, analysis only up to 500 h.. Our findings suggest that the choice of the dye has an important impact on the long-term stability of DSSCs and must be considered a key factor in the degradation mechanism.
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