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首页> 外文期刊>ChemPlusChem >Photostability and Moisture Stability of CH3NH3PbI3-based Solar Cells by Ethyl Cellulose
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Photostability and Moisture Stability of CH3NH3PbI3-based Solar Cells by Ethyl Cellulose

机译：乙基纤维素CH3NH3PBI3的太阳能电池的光稳定性和水分稳定性

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摘要

Organic-inorganic hybrid perovskite solar cells have achieved high power conversion efficiencies (PCE) of around 22%, comparable to conventional silicon and thin-film solar cells. However, the poor stability of the perovskite material is one of the significant drawbacks for its practical application. In moderate humidity, the perovskite hydrates and decomposes within hours or a few days, which deteriorates the device efficiency rapidly. Herein, is demonstrated the moisture stability and photostability of CH3NH3PbI3 can be greatly improved through the interaction between ethyl cellulose (EC) and perovskite crystals. It is found that the CH3NH3PbI3 film with EC incorporation is stable over 5 days in 60% relative humidity (RH) under ambient indoor light, whereas the conventional CH3NH3PbI3 film without EC is degraded in 1 day. After being stored in 60% RH under ambient indoor light for 2.5 days, the solar cell with EC incorporation shows a PCE decrement from 14.08% to 8.21 %, whereas that without EC is nearly entirely degraded (PCE=0%). Nuclear magnetic resonance (NMR) spectroscopy shows that hydrogen bonding between EC and CH3NH3PbI3 accounts for the improved moisture stability by stabilizing the crystal structure.
机译：有机 - 无机杂交钙钛矿太阳能电池已经实现了大约22％的高功率转换效率（PCE），与传统硅和薄膜太阳能电池相当。然而，Perovskite材料的差稳定性是其实际应用的重要缺点之一。在中等湿度下，钙钛矿水合物在小时内或几天内分解，迅速地降低了器件效率。在此，通过乙基纤维素（EC）和钙钛矿晶体之间的相互作用，可以大大提高CH3NH3PBI3的水分稳定性和光稳定性。结果发现，在环境室内光下，在60％相对湿度（RH）中，具有EC掺入的CH3NH3PBI3膜在60％相对湿度（RH）下稳定，而没有EC的常规CH3NH3PBI3薄膜在1天内降解。在环境室内灯下储存在60％RH后，25天，具有EC Incorporation的太阳能电池显示从14.08％至8.21％的PCE减少，而没有EC几乎完全降级（PCE = 0％）。核磁共振（NMR）光谱表明，EC和CH3NH3PBI3之间的氢键通过稳定晶体结构来提高水分稳定性。

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  • 来源
    《ChemPlusChem》 |2016年第12期|共7页
  • 作者

    He Jian; Ng Chun-Fai; Wong King Young; Liu Weifeng; Chen Tao;

  • 作者单位

    Chinese Acad Sci Univ Sci &

    Technol China Dept Mat Sci &

    Engn Key Lab Mat Energy Convers 96;

    Chinese Univ Hong Kong Dept Chem Shatin Hong Kong Peoples R China;

    Chinese Univ Hong Kong Dept Phys Shatin Hong Kong Peoples R China;

    Chinese Acad Sci Univ Sci &

    Technol China Dept Mat Sci &

    Engn Key Lab Mat Energy Convers 96;

    Chinese Acad Sci Univ Sci &

    Technol China Dept Mat Sci &

    Engn Key Lab Mat Energy Convers 96;

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

    ethyl cellulose; organic-inorganic hybrid; perovskite; solar cells;

    机译：乙基纤维素;有机 - 无机杂交;Perovskite;太阳能电池;

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