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首页> 外文期刊>Advanced energy materials >Triggering the Passivation Effect of Potassium Doping in Mixed-Cation Mixed-Halide Perovskite by Light Illumination
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Triggering the Passivation Effect of Potassium Doping in Mixed-Cation Mixed-Halide Perovskite by Light Illumination

机译：浅光照明触发钾掺杂在混合阳离子混合卤化卤酸盐中的钝化作用

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摘要

Potassium (K+) doping has been recently discovered as an effective route to suppress hysteresis and improve the performance stability of perovskite solar cells. However, the mechanism of these K+ doping effects is still under debate, and rationalization of the improved performance in these perovskites is needed. Herein, the photoluminescence (PL) properties and device performance of mixed-cation mixed-halide perovskite are dynamically monitored with and without K+ doping under bias light illumination via a confocal fluorescence microscope, together with ultrafast transient absorption as well as time-dependent and time-resolved PL measurements. It is demonstrated that illumination is essential to trigger the passivation effect of K+ by forming KBr-like compounds, leading to the elimination of interface trapping defects and suppression of mobile ion migration, thus resulting in improved power conversion efficiency and negligible current-voltage hysteresis of solar cells. This work provides novel insight into the hysteresis suppression upon K+ doping and highlights the significance of light illumination when using this protocol.
机译：最近已经发现钾（K +）掺杂作为抑制滞后的有效途径，提高钙钛矿太阳能电池的性能稳定性。然而，这些K +掺杂效应的机制仍在辩论中，需要在这些钙锌矿中的改善性能的合理化。在此，通过共聚焦荧光显微镜在偏置光照下，用k +掺杂动态地监测混合阳离子混合卤化卤化卤化物钙钛矿的光致发光（pl）性能和装置性能，并通过共聚焦荧光显微镜以及超快瞬态吸收以及时间依赖和时间-RESOLVED PL测量。结果证明，通过形成类似KBR样化合物，照明对于触发K +的钝化效果是必要的，导致消除界面捕获缺陷和移动离子迁移的抑制，从而提高了电力转换效率和可忽略的电流 - 电压滞后太阳能电池。这项工作为K +掺杂的滞后抑制提供了新颖的洞察力，并突出了使用本协议时光照明的重要性。

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  • 来源
    《Advanced energy materials》 |2019年第24期|1901016.1-1901016.11|共11页
  • 作者

    Zheng Fei; Chen Weijian; Bu Tongle; Ghiggino Kenneth P.; Huang Fuzhi; Cheng Yibing; Tapping Patrick; Kee Tak W.; Jia Baohua; Wen Xiaoming;

  • 作者单位

    Swinburne Univ Technol Ctr Translat Atomat Hawthorn Vic 3122 Australia|Univ Melbourne ARC Ctr Excellence Exciton Sci Sch Chem Parkville Vic 3010 Australia;

    Swinburne Univ Technol Ctr Translat Atomat Hawthorn Vic 3122 Australia;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Hubei Peoples R China;

    Univ Melbourne ARC Ctr Excellence Exciton Sci Sch Chem Parkville Vic 3010 Australia;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Hubei Peoples R China;

    Univ Adelaide Dept Chem Adelaide SA 5005 Australia;

    Univ Adelaide Dept Chem Adelaide SA 5005 Australia;

    Swinburne Univ Technol Ctr Translat Atomat Hawthorn Vic 3122 Australia;

    Swinburne Univ Technol Ctr Translat Atomat Hawthorn Vic 3122 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    light soaking; passivation; perovskites; photoluminescence; potassium (K+) doping;

    机译：光浸泡;钝化;Perovskites;光致发光;钾（K +）掺杂;

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