材料科学
光电探测器
纳米棒
光电子学
光致发光
表面等离子共振
响应度
紫外线
光电效应
纳米颗粒
表面等离子体子
等离子体子
激子
纳米技术
物理
量子力学
作者
Junfeng Lu,Chunxiang Xu,Jun Dai,Jitao Li,Yueyue Wang,Yi Lin,Panlin Li
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2015-01-01
卷期号:7 (8): 3396-3403
被引量:155
摘要
In this study, localized surface plasmon resonance mediated by aluminium nanoparticles (Al NPs) was employed to enhance the ultraviolet (UV) response of ZnO nanorod array (NRA) photodetectors grown vertically on a Quartz substrate using a simple vapor transport method. The responsivity of the ZnO NRA photodetector decorated with Al NPs was enhanced from 0.12 to 1.59 A W−1 and the sensitivity and response rate have been improved greatly compared with those of the bare one. The measurement results in the transmittance spectra and time-resolved photoluminescence spectra suggest that the improved photoresponse and the enhanced spontaneous emission of the ZnO NRA photodetector with Al NP decoration are both attributed to resonant coupling between the excitons in ZnO and the localized surface plasmons (LSPs) in the Al NPs. Our results demonstrated that the plasmon-enhanced ZnO NRA photodetector has a great potential for application in building sensors with a fast response and reset time, high sensitivity, and good signal-to-noise ratio for photoelectric sensing.
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