CIDETEC-IK4, Paseo Miramón 196, 20009 Donostia/San Sebastian, Spain.
J Am Chem Soc. 2011 Dec 21;133(50):20156-9. doi: 10.1021/ja2096865. Epub 2011 Nov 29.
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-)/S(n)(2-) 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·cm(-2) 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.
进一步开发量子点敏化太阳能电池（QDSCs）除了需要在近年来不断提高光伏（PV）转换效率之外，还需要长期稳定性。我们报告了一种稳健的 S(2-)/S(n)(2-)电解质，该电解质专门设计用于与敏化太阳能电池中的 CdSe 量子点兼容。新的吡咯烷鎓离子液体在空气质量 1.5 全球光照下达到 1.86%的效率和接近 14 mA·cm(-2)的短路电流，并通过良好的光电阳极稳定性提高了器件寿命，超过 240 小时。PV 特性表明，太阳能电池的限制因素与对电极的再生催化不良和高复合有关。在这种稳健的电解质结构中进一步改进这些因素可能会对提高 QDSCs 的技术水平产生重大影响。
