Enhanced the UV response of AlN coated ZnO nanorods photodetector
Enhanced the UV response of AlN coated ZnO nanorods photodetector
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增强 AlN 涂层 ZnO 纳米棒光电探测器的紫外响应
DOI：
10.1016/j.jallcom.2018.10.247
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发表时间：
2019-03-05
影响因子：
6.2
通讯作者：
Zhao, LianCheng
中科院分区：
文献类型：
--
作者：
Amany, A.;Wang, DongBo;Zhao, LianCheng
ZnO纳米棒由于其优异的光电性能，在紫外光电探测器（UVPDs）中具有广阔的应用前景。然而，基于ZnO纳米结构的uvpd的响应仍然很低，因为界面处有大量的非辐射中心和表面态的电子捕获。本文分别生长了带AlN涂层和不带AlN涂层的ZnO纳米棒，通过各种实验方法研究了AlN涂层对ZnO纳米棒和各自uvpd性能的影响。光学性能研究表明，AlN涂层显著增强了ZnO纳米棒的紫外发射强度。此外，镀有AlN涂层的ZnO纳米棒的光响应性能也有明显的提高，与裸ZnO纳米棒相比提高了一个数量级以上。这种性能的增强与载流子约束效应和表面钝化有关。这项工作为寻找下一代低成本、大面积、节能的光电器件的新结构提供了一些启示。(C) 2018年Elsevier B.V.出版
ZnO nanorods have attracted considerable attention as promising candidate in UV photodetectors (UVPDs) ascribe to their excellent optoelectronic properties. However, the response of UVPDs based on ZnO nanostructures are still low due to a large number of nonradiative centers at interface and electron trapping by the surface states. In this letter, ZnO nanorods with and without AlN coating layer have been grown, the effect of AlN coating layer on the ZnO nanorods and the respective UVPDs performance are carefully studied by various experimental methods. The research on the optical properties indicates that with AlN coating layer, the UV emission intensity of ZnO nanorods significantly enhanced. Furthermore, the photoresponse performance of ZnO nanorods with AlN coating layer has also show an obvious improvement, which is more than one order compare with the bare ZnO nanorods. The enhanced performance is believed to be correlated to the carrier confinement effect together with the surface passivation. This work sheds some lights in searching new structures for next-generation of low cost, large area, and energy efficient optoelectronic devices. (C) 2018 Published by Elsevier B.V.