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Plasmon-Induced Pyro-Phototronic Effect Enhancement in Self-Powered UV–Vis Detection with a ZnO/CuO p–n Junction Device

机译:Plasmon-Induced Pyro-Phototronic Effect Enhancement in Self-Powered UV–Vis Detection with a ZnO/CuO p–n Junction Device

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摘要

It is important to detect light of low power density sensitively and fast for the application of optical communication, environmental monitoring, astronomy, and national securities. However, ZnO-based photodetectors exhibit long decay time owing to the persistent photoconductivity (PPC) and are hard to detect light with low power density efficiently. Here, a practical strategy is utilized to improve the performance of ZnO-based photodetectors by coupling the pyroelectric effect of ZnO with localized surface plasmon resonance (LSPR) of Au nanoparticles subtly. Hence, a self-powered photodetector is demonstrated, which is integrated with ZnO/CuO core-shell nanorods and Au nanoparticles to detect UV to vis light. This self-powered photodetector achieves fast and sensitive detection of UV when power density is 68 nW cm(-2). The performance is significantly improved than the photodetectors without Au nanoparticles. The optimal responsivity and detectivity under the same power density of UV at 325 nm are 1.4 x 10(-4) A W-1 and 3.3 x 10(11) Jones. Response/recovery time is remarkably shortened to approximate to 10 ms. The results indicate that the material configurations and design concept make the device applicable for self-powered, high-performance photodetectors, and provide further promoted understanding of LSPR enhanced performance of photodetectors.

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  • 来源
    《Advanced functional materials》 |2022年第7期|2108903.1-2108903.8|共8页
  • 作者单位

    Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing Key Lab Micronano Energy & Sensor, CAS Ctr Excellence Nanosci, Beijing 101400, Peoples R China|Guangxi Univ, Coll Chem & Chem Engn, Nanning 530004, Peoples R China|Guangxi Univ, Sch Phys Sci &;

    Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing Key Lab Micronano Energy & Sensor, CAS Ctr Excellence Nanosci, Beijing 101400, Peoples R China|Guangxi Univ, Sch Phys Sci & Technol, Ctr Nanoenergy Res, Nanning 530004, Peoples R China|Univ Chi;

    Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing Key Lab Micronano Energy & Sensor, CAS Ctr Excellence Nanosci, Beijing 101400, Peoples R China|Univ Chinese Acad Sci, Sch Nanosci & Technol, Beijing 100049, Peoples R China;

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  • 正文语种 英语
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  • 关键词

    core-shell ZnO/CuO; low power density; plasmon-enhanced pyroelectric; self-powered photodetector;

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