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首页> 外文期刊>Advanced energy materials >The Role of Electron Affinity in Determining Whether Fullerenes Catalyze or Inhibit Photooxidation of Polymers for Solar Cells
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The Role of Electron Affinity in Determining Whether Fullerenes Catalyze or Inhibit Photooxidation of Polymers for Solar Cells

机译：电子亲和力在确定富勒烯是否催化或抑制太阳能电池聚合物的光氧化中的作用

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摘要

Understanding the stability and degradation mechanisms of organic solar materials is critically important to achieving long device lifetimes. Here, an investigation of the photodegradation of polymer:fullerene blend films exposed to ambient conditions for a variety of polymer and fullerene derivative combinations is presented. Despite the wide range in polymer stabilities to photodegradation, the rate of irreversible polymer photobleaching in blend films is found to consistently and dramatically increase with decreasing electron affinity of the fullerene derivative. Furthermore, blends containing fullerenes with the smallest electron affinities photobleached at a faster rate than films of the pure polymer. These observations can be explained by a mechanism where both the polymer and fullerene donate photogenerated electrons to diatomic oxygen to form the superoxide radical anion which degrades the polymer.
机译：了解有机太阳能材料的稳定性和降解机理对于延长设备使用寿命至关重要。在此，对暴露于环境条件下的各种聚合物和富勒烯衍生物组合的聚合物：富勒烯共混薄膜进行光降解进行了研究。尽管聚合物对光降解的稳定性范围很广，但发现共混膜中不可逆聚合物光漂白的速率随着富勒烯衍生物的电子亲和力的降低而持续且显着增加。此外，含有富勒烯且电子亲和力最小的共混物比纯聚合物薄膜的光漂白速度更快。这些观察结果可以通过一种机理来解释，在该机理中，聚合物和富勒烯都将光生电子提供给双原子氧，从而形成使聚合物降解的超氧自由基阴离子。

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  • 来源
    《Advanced energy materials》 |2012年第11期|1-7|共7页
  • 作者

    Eric T. Hoke; I. T. Sachs-Quintana; Matthew T. Lloyd; Isaac Kauvar; William R. Mateker; Alexandre M. Nardes; Craig H. Peters; Nikos Kopidakis; Michael D. McGehee;

  • 作者单位

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

    National Renewable Energy Laboratory 1617 Cole Blvd Golden CO 80401 USA;

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

    National Renewable Energy Laboratory 1617 Cole Blvd Golden CO 80401 USA;

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

    National Renewable Energy Laboratory 1617 Cole Blvd Golden CO 80401 USA;

    Department of Material Science and Engineering Stanford University 476 Lomita Mall Stanford CA 94305 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    degradation; organic solar cells; photooxidation; photovoltaics; electron affinity;

    机译：降解;有机太阳能电池;光氧化;光伏;电子亲和力;

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