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Optimized performance III-nitride-perovskite-based heterojunction photodetector via asymmetric electrode configuration

机译:通过不对称电极配置优化了基于III-氮化物 - 钙钛的异质结光电探测器

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摘要

Organometal halide perovskite photodetectors have recently drawn significant attention due to their excellent potential to perform as broadband photodetectors. However, the photoresponse in the ultraviolet (UV) spectrum can be improved by introducing wide bandgap semiconductors. In this work, we report on a methylammonium lead iodide/p-type gallium nitride (MAPI/p-GaN) heterojunction photodetector. We demonstrate that the device is capable of detecting in the UV region by p-GaN being hybridized with MAPI. We further investigate different symmetric and asymmetric metal-electrode contacts to enhance the device performance including the response time. The asymmetric electrode configuration is found to be the most optimal configuration which results in high photoresponse (photo-responsivity is 55 mA W-1 and fall time < 80 ms). As the light illumination occurs through the GaN side, its presence ultimately reduces MAPI degradation due to efficient absorption of the UV photons by GaN film.
机译:有机计量卤化物钙钛矿光电探测器最近引起了显着的关注,因为它们具有作为宽带光电探测器的优异潜力。 然而,通过引入宽带隙半导体,可以改善紫外线(UV)光谱中的光响应。 在这项工作中,我们报道甲基铅碘化物/ p型氮化物(MAPI / P-GaN)异质结光电探测器。 我们证明该装置能够通过用MAPI杂交的P-GaN在UV区域中检测。 我们进一步研究了不同的对称和不对称金属电极触点,以增强包括响应时间的装置性能。 发现不对称电极配置是最佳的配置,这导致高光源(光响应度为55 mA W-1和下降时间<80毫秒)。 随着光照照射通过GaN侧发生,其存在最终降低了由于GaN膜的有效吸收UV光子而降低MAPI降解。

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  • 来源
    《RSC Advances》 |2020年第10期|共6页
  • 作者单位

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

    KAUST Phys Sci &

    Engn Div Thuwal 239556900 Saudi Arabia;

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

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