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首页> 外文期刊>ACS applied materials & interfaces >Giant Humidity Effect on Hybrid Halide Perovskite Microstripes: Reversibility and Sensing Mechanism
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Giant Humidity Effect on Hybrid Halide Perovskite Microstripes: Reversibility and Sensing Mechanism

机译：对杂交卤化物钙钛矿微带微带的巨型湿度效应：可逆性和传感机制

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摘要

Despite the exceptional performance of hybrid perovskites in photovoltaics, their susceptibility to ambient factors, particularly humidity, gives rise to the well-recognized stability issue. In the present work, microstripes of CH3NH3PbI3 are fabricated on flexible substrates, and they exhibit much larger response to relative humidity (RH) levels than continuous films and single crystals. The resistance of microstripes decreases by four orders of magnitude on changing the RH level from 10 to 95%. Fast response and recovery time of 100 and 500 ms, respectively, are recorded. Because bulk diffusion and defect trapping are much slower processes, our result indicates a surface-dictated mechanism related to hydrate formation and electron donation. In addition, water uptake behavior of perovskites is studied for the first time, which correlates well with the resistance decrease of the CH3NH3PbI3 microstripes. Furthermore, we report that the photoresponse decreases with increasing humidity, and at the 85% RH level, the perovskite device is not photoresponsive anymore. Our work underscores patterned structures as a new platform to investigate the interaction of hybrid perovskites with ambient factors and reveals the importance of the humidity effect on optoelectronic performance.
机译：尽管Hybrid Perovskites在光伏中表现出卓越的性能，但它们对环境因素，特别是湿度的易感性，引起了公认的稳定性问题。在本作工作中，在柔性衬底上制造CH3NH3PBI3的微带物，并且它们对比连续膜和单晶的相对湿度（RH）水平具有更大的响应。微带的电阻在将RH水平从10％降至95％时减少了四个数量级。记录快速响应和恢复时间为100和500ms。因为散装扩散和缺陷俘获很慢的过程，我们的结果表明了与水合物形成和电子捐赠有关的表面规定机制。此外，第一次研究了钙钛矿的水吸收行为，其与CH3NH3PB13微带的电阻降低相比好。此外，我们报告了光响应随着湿度的增加而降低，并且在85％RH水平上，钙钛矿器件不再是光反应。我们的工作强调图案化结构作为一种新的平台，以研究杂交钙酸盐与周围因素的相互作用，并揭示了湿度影响对光电性能的重要性。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第33期|共9页
  • 作者

    Haque Md Azimul; Syed Ahad; Akhtar Faheem Hassan; Sheyate Rahul; Singh Simrjit; Peinemann Klaus-Viktor; Baran Derya; Wu Tom;

  • 作者单位

    King Abdullah Univ Sci &

    Technol KSC Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci &

    Technol Core Labs Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci &

    Technol Phys Sci &

    Engn Div Adv Membranes &

    Porous Mat Ctr Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci &

    Technol Phys Sci &

    Engn Div Adv Membranes &

    Porous Mat Ctr Thuwal 239556900 Saudi Arabia;

    Univ New South Wales Sch Mat Sci &

    Engn Sydney NSW 2052 Australia;

    King Abdullah Univ Sci &

    Technol Phys Sci &

    Engn Div Adv Membranes &

    Porous Mat Ctr Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci &

    Technol KSC Thuwal 239556900 Saudi Arabia;

    Univ New South Wales Sch Mat Sci &

    Engn Sydney NSW 2052 Australia;

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

    hybrid perovskite; humidity; lithography; patterns; sensor;

    机译：Hybrid Perovskite;湿度;光刻;图案;传感器;

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