Ag nanoparticles@ZnO nanowire composite arrays: an absorption enhanced UV photodetector
Ag nanoparticles@ZnO nanowire composite arrays: an absorption enhanced UV photodetector
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Ag纳米颗粒@ZnO纳米线复合阵列：吸收增强型紫外光电探测器
DOI：
10.1364/oe.22.030148
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发表时间：
2014-12-01
期刊：
影响因子：
3.8
通讯作者：
Gao, Yihua
中科院分区：
文献类型：
--
作者：
Liu, Yang;Zhang, Xianghui;Gao, Yihua
采用化学气相沉积和热蒸发相结合的方法，在ZnO纳米线阵列上组装Ag纳米粒子，制备了一种新型异质结紫外光探测器。所制备的Ag@ZnO纳米线阵列的紫外吸收峰蓝移，可见光吸收峰被抑制，紫外-红外吸收和室温光致发光（PL）发射明显增强。这些现象归因于局域表面等离子体共振（LSPR）效应。在365 nm紫外光照射下，Ag@ZnO异质结的光电流增加了117%，响应时间为80 ms，恢复时间为3.27 s。本研究为制备高性能紫外光探测器提供了一条简单的途径，对光电器件的研制具有一定的参考价值。(C)2014年美国光学学会
A novel heterojunction ultraviolet (UV) photodetector of assembling Ag nanoparticles (NPs) onto ZnO nanowire (NW) arrays was fabricated via combination of chemical vapor deposition and thermal evaporation route. The fabricated composite Ag@ZnO NW arrays show blue-shift of UV peaks, suppression of the visible peaks, and obvious enhancements in absorption from ultraviolet to infrared region and photoluminescence (PL) emission at room-temperature. These phenomena are attributed to the Localized Surface Plasmon Resonance (LSPR) effect. Benefiting from absorption enhancement and surface heterojunctions, Ag@ZnO heterostructures show a photocurrent increment by 117%, a short response time of 80 ms and a recovery time of 3.27 s under 365 nm UV illumination of 0.24 mW/cm(2). This research presented a simple route to obtain high performance UV photodetectors and would be of some benefit in optical-electron devices manufacture. (C) 2014 Optical Society of America