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首页> 外文期刊>Energy & environmental science >Reducing burn-in voltage loss in polymer solar cells by increasing the polymer crystallinity
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Reducing burn-in voltage loss in polymer solar cells by increasing the polymer crystallinity

机译:通过增加聚合物的结晶度来减少聚合物太阳能电池的老化电压损耗

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摘要

In order to commercialize polymer solar cells, the fast initial performance losses present in many high efficiency materials will have to be managed. This burn-in degradation is caused by light-induced traps and its characteristics depend on which polymer is used. We show that the light-induced traps are in the bulk of the active layer and we find a direct correlation between their presence and the open-circuit voltage loss in devices made with amorphous polymers. Solar cells made with crystalline polymers do not show characteristic open circuit voltage losses, even though light-induced traps are also present in these devices. This indicates that crystalline materials are more resistant against the influence of traps on device performance. Recent work on crystalline materials has shown there is an energetic driving force for charge carriers to leave amorphous, mixed regions of bulk heterojunctions, and charges are dominantly transported in pure, ordered phases. This energetic landscape allows efficient charge generation as well as extraction and also may benefit the stability against light-induced traps.
机译:为了使聚合物太阳能电池商业化,必须控制许多高效材料中存在的快速初始性能损失。这种老化降解是由光诱导的陷阱引起的,其特性取决于所使用的聚合物。我们显示出光致陷阱在有源层的主体中,并且我们发现它们的存在与由非晶态聚合物制成的器件中的开路电压损耗之间存在直接关系。即使在这些设备中也存在光感应陷阱,由结晶聚合物制成的太阳能电池也不会表现出特征性的开路电压损耗。这表明晶体材料更能抵抗陷阱对器件性能的影响。关于晶体材料的最新研究表明,电荷载流子有强大的驱动力离开非晶的,混合的本体异质结区域,并且电荷主要以纯的有序相传输。这种充满活力的景观不仅可以有效地产生电荷,而且可以提取电荷,并且还可以提高抗光陷阱的稳定性。

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  • 来源
    《Energy & environmental science》 |2014年第9期|2974-2980|共7页
  • 作者单位

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA,MEET, Friedrich-Alexander-Universitaet Erlangen-Nuernberg (FAU), Erlangen, Germany;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

    MEET, Friedrich-Alexander-Universitaet Erlangen-Nuernberg (FAU), Erlangen, Germany;

    MEET, Friedrich-Alexander-Universitaet Erlangen-Nuernberg (FAU), Erlangen, Germany,Bayerisches Zentrum fuer Angewcmdte Energieforschung, Erlangen, Germany;

    Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA;

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