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首页> 外文期刊>Journal of the American Chemical Society >Efficiency Enhancement of Perovskite Solar Cells through Fast Electron Extraction: The Role of Graphene Quantum Dots
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Efficiency Enhancement of Perovskite Solar Cells through Fast Electron Extraction: The Role of Graphene Quantum Dots

机译：通过快速电子萃取提高钙钛矿太阳能电池的效率：石墨烯量子点的作用

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摘要

We report on a significant power conversion efficiency improvement of perovskite solar cells from 8.81% to 10.15% due to insertion of an ultrathin graphene quantum dots (GQDs) layer between perovskite and TiO_2. A strong quenching of perovskite photo-luminescence was observed at ～760 nm upon the addition of the GQDs, which is pronouncedly correlated with the increase of the 1PCE and the APCE of the respective cells. From the transient absorption measurements, the improved cell efficiency can be attributed to the much faster electron extraction with the presence of GQDs (90-106 ps) than without their presence (260-307 ps). This work highlights that GQDs can act as a superfast electron tunnel for optoelectronic devices.
机译：我们报告钙钛矿太阳能电池的功率转换效率从8.81％显着提高到10.15％，这是由于在钙钛矿和TiO_2之间插入了超薄石墨烯量子点（GQDs）层。加入GQDs后，在〜760 nm处钙钛矿光致发光发生了强烈的猝灭，这与各细胞的1PCE和APCE的增加明显相关。从瞬态吸收测量结果来看，改进的电池效率可以归因于存在GQDs（90-106 ps）的电子提取比不存在GQDs（260-307 ps）的电子提取快得多。这项工作强调了GQD可以充当光电设备的超快电子隧道。

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  • 来源
    《Journal of the American Chemical Society》 |2014年第10期|3760-3763|共4页
  • 作者

    Zonglong Zhu; Jiani Ma; Zilong Wang; Cheng Mu; Zetan Fan; Lili Du; Yang Bai; Louzhen Fan; He Yan; David Lee Phillips; Shihe Yang;

  • 作者单位

    Nano Science and Technology Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

    Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P. R China;

    Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

    Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

    Department of Chemistry, Beijing Normal University, Beijing 100875, China;

    Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P. R China;

    Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

    Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P. R China;

    Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

    Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P. R China;

    Nano Science and Technology Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-18 03:11:06

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