半导体光电, 2018, 39 (3): 322, 网络出版: 2018-06-29
ZnO缓冲层对Mg0.3Zn0.7O紫外探测器的影响
Effect of ZnO Buffer Layer on Mg0.3Zn0.7O Ultraviolet Detectors
ZnO缓冲层 溶胶凝胶法 紫外探测器 光响应特性 ZnO buffer layer Mg0.3Zn0.7O Mg0.3Zn0.7O solgel method ultraviolet detectors optical response
摘要
利用溶胶凝胶法制备了Mg0.3Zn0.7O薄膜, 并制作了金属半导体金属结构的深紫外探测器。研究了高质量ZnO缓冲层的引入对Mg0.3Zn0.7O薄膜的吸收谱和结晶特性以及Mg0.3Zn0.7O紫外探测器响应参数的影响。实验结果表明: ZnO缓冲层的引入使Mg0.3Zn0.7O薄膜的紫外可见光吸收谱有轻微的红移, 但可以明显提高薄膜的结晶质量, 同时ZnO/Mg0.3Zn0.7O探测器的IV特性表明, ZnO缓冲层的引入可以显著提高器件的光电流, 改善其响应特性, 在20V偏压下将Mg0.3Zn0.7O探测器的响应度由0.035A/W提高至0.63A/W。
Abstract
Mg0.3Zn0.7O thin films were prepared by solgel method, and deepultraviolet detectors with metalsemiconductormetal structure were fabricated. Effects of high quality ZnO buffer layer on the optical properties of the Mg0.3Zn0.7O films and the IV characteristics of the detectors were investigated. The results show that a slight red shift occurrs in the UVvisible absorption spectrum of Mg0.3Zn0.7O thin film with ZnO buffer layer. However, the introduction of the ZnO buffer layer obviously improves the crystal quality of the film. Furthermore, the IV curves of the ultraviolet detectors exhibit that the photocurrent of the device increases significantly with the ZnO buffer layer. At a bias of 20V, the responsivity of the detector increases from 0.035A/W to 0.63A/W.
黄志娟, 喻志农, 杨伟声, 李言, 苏秉华, 薛唯. ZnO缓冲层对Mg0.3Zn0.7O紫外探测器的影响[J]. 半导体光电, 2018, 39(3): 322. HUANG Zhijuan, YU Zhinong, YANG Weisheng, LI Yan, SU Binghua, XUE Wei. Effect of ZnO Buffer Layer on Mg0.3Zn0.7O Ultraviolet Detectors[J]. Semiconductor Optoelectronics, 2018, 39(3): 322.