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首页> 外文期刊>Applied Surface Science >High-performance UV-Vis-NIR photodetectors based on plasmonic effect in Au nanoparticles/ZnO nanofibers
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High-performance UV-Vis-NIR photodetectors based on plasmonic effect in Au nanoparticles/ZnO nanofibers

机译：基于Au纳米粒子/ ZnO纳米纤维的等离子体效应的高性能UV-Vis-Nir光电探测器

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摘要

In this study, UV-Vis-NIR photodetectors based on decorated ZnO nanofibers (NFs) with optimized coverage of Au nanoparticles (NPs) fabricated via combined simple electrospinning and sputtering techniques are introduced. The effect of different coverages of Au NPs resulted from different Au nominal layer thicknesses on the morphology and optical properties of the ZnO fibers are investigated through various characterization methods. It is discovered that 4 nm Au nominal thickness provides the highest UV on/off ratio (similar to 460), responsivity (similar to 332 A/W), detectivity (similar to 2.93 x 10(11) Jones) as well as faster rise and decay times as compared to pure ZnO nanofibers. A broad spectral response from UV to NIR with high photoresponsivity and fast response time ( 0.5 s) in the visible and NIR regions are achieved for the sample decorated with 8 nm Au nominal thickness. Response to visible and IR irradiations and initial fast response to UV are originated from localized surface plasmon resonance (LSPR) absorption of the Au NPs and effective separation and transport of photogenerated carriers, wherein slow response to UV is due to adsorption/desorption of oxygen species.
机译：在该研究中，引入了基于装饰的ZnO纳米纤维（NFS）的UV-Vis-Nir光电探测器，其具有通过组合简单的静电纺丝和溅射技术制造的Au纳米颗粒（NPS）的优化覆盖。通过各种表征方法研究了不同AU标称层厚度对ZnO纤维的形态和光学性质的不同Au nps的不同覆盖率的影响。发现4nm Au标称厚度提供最高的UV开/关比（类似于460），响应率（类似于332 A / W），探测（类似于2.93 x 10（11）琼斯）以及更快的升高与纯ZnO纳米纤维相比，衰减时间。对于具有8nm Au标称厚度的样品，实现了具有高光反应性和快速响应时间（<0.5秒）的来自UV至NIR的宽光谱响应。对可见的和IR照射和对UV的初始快速反应的反应源自局部表面等离子体共振（LSPR）Au NPS的吸收和光生载体的有效分离和传输，其中对UV的缓慢反应是由于氧物种的吸附/解吸。

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