A Sulfide/Polysulfide-Based Ionic Liquid Electrolyte for Quantum Dot-Sensitized Solar Cells

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• 作者：Vasko Jovanovski ; Victoria Gonz谩lez-Pedro ; Sixto Gim茅nez ; Eneko Azaceta ; Germ谩n Caba帽ero ; Hans Grande ; Ramon Tena-Zaera ; Iv谩n Mora-Ser贸 ; Juan Bisquert
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：December 21, 2011
• 年：2011
• 卷：133
• 期：50
• 页码：20156-20159
• 全文大小：259K
• 年卷期：v.133,no.50(December 21, 2011)
• ISSN：1520-5126

文摘

Further development of quantum dot-sensitized solar cells (QDSCs) will require long-term stability in addition to the continuous increase of photovoltaic (PV) conversion efficiency achieved in the last years. We report a robust S^{2鈥?/sup>/S_n2鈥?/sup> electrolyte that has been specifically designed for compatibility with CdSe quantum dots in sensitized solar cells. The new pyrrolidinium ionic liquid reaches 1.86% efficiency and a short-circuit current close to 14 mA路cm鈥? under air-mass 1.5 global illumination and improves the device lifetime with good photoanode stability over 240 h. PV characterization showed that the solar cell limitations relate to poor catalysis of regeneration at the counter electrode and high recombination. Further improvement of these factors in the robust electrolyte configuration may thus have a significant impact for advancing the state-of-the-art in QDSCs.}