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Stability of graphene-based heterojunction solar cells

机译：基于石墨烯的异质结太阳能电池的稳定性

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摘要

Bulk-heterojunction (BHJ) solar cells based on organic small molecules and polymers are the focus of increasing attention by science and commerce. In organic photovoltaic devices, a conjugated polymer layer is used as the donor, while a fullerene-based derivative is used as the acceptor. Poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) is one of the most common interfacial materials used for organic BHJ solar cells. However, PEDOT:PSS is acidic and hygroscopic in nature, and it inherits microstructural inhomogeneities that cause not only gradual degradation, but a complete failure of BHJ solar cell devices. There is a growing interest in graphene-based solar cells because graphene-based materials offer ease of solution processability, high optical transparency, and high power conversion efficiency. Graphene has been actively investigated for use as a transparent conducting electrode, and as a photoactive layer in fabricating solar cell devices. Power conversion efficiency in the range of 10% to 15% for graphene and inorganic semiconductor-based hybrid heterojunction solar cells, and 15.6% for graphene-containing perovskite solar cells has been observed. Organic materials-based solar cells degrade not only from environmental exposure, but also from photo-oxidation caused by light illumination. In addition to higher power conversion efficiency, stability in graphene-based solar cells is critically important for commercial applications. In this review article, the stability of graphene-based heterojunction solar cells under atmospheric conditions is evaluated. Current studies show that the insertion of a graphene buffer layer into solar cell heterostructures stops degradation and enhances stability in solar cell devices. Long-term environmental stability of graphene-based heterojunction solar cells for commercial applications is discussed.
机译：基于有机小分子和聚合物的散装异质结（BHJ）太阳能电池是科学和商业越来越多的重点。在有机光伏器件中，使用共轭聚合物层作为供体，而富勒烯的衍生物用作受体。聚（3,4-亚乙二氧基噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）是用于有机BHJ太阳能电池的最常见的界面材料之一。然而，PEDOT：PSS本质上是酸性和吸湿性的，并且它继承了不仅逐渐降解的微观结构的不均匀性，而且继承了BHJ太阳能电池装置的完全失败。基于石墨烯的太阳能电池存在越来越多的兴趣，因为基于石墨烯的材料提供了易于解决的溶液加工性，高光学透明度和高功率转换效率的兴趣。已经主动研究了石墨烯作为透明导电电极，并且作为制造太阳能电池装置的光活性层。对于石墨烯和无机半导体的杂交异质结太阳能电池的电力转换效率在10％至15％的范围内，并且已经观察到含石墨烯的钙钛矿太阳能电池的15.6％。基于有机材料的太阳能电池不仅从环境暴露中降低，而且脱脂，也可从光照射引起的光氧化。除了更高的功率转换效率之外，基于石墨烯的太阳能电池的稳定性对于商业应用来说是至关重要的。在本文中，评估了大气条件下基于石墨烯的异质结太阳能电池的稳定性。目前的研究表明，将石墨烯缓冲层插入太阳能电池异质结构停止降解并提高太阳能电池装置的稳定性。讨论了基于石墨烯的异质结太阳能电池的长期环境稳定性。

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  • 来源
    《RSC Advances》 |2015年第90期|共26页
  • 作者

    Singh Eric; Nalwa Hari Singh;

  • 作者单位

    William S Hart High Sch Santa Clarita CA 91321 USA;

    Adv Technol Res Valencia CA 91381 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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