Direct ZnO X-Ray Detector with Tunable Sensitivity
Hui-Li Liang1** , Shu-Juan Cui1,2 , Wen-Xing Huo1,2 , Tao Wang1,2 , Yong-Hui Zhang1,2 , Bao-Gang Quan3 , Xiao-Long Du1,2,4 , Zeng-Xia Mei1**
1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001902 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 1000493 Laboratory of Microfabrication, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001904 Songshan Lake Materials Laboratory, Dongguan 523808
Abstract ：Direct ZnO x-ray detectors with tunable sensitivity are realized by delicately controlling the oxygen flux during the sputtering deposition process. The photocurrents induced by x-rays from a 40 kV x-ray tube with a Cu anode increase apparently as the oxygen flux decreases, which is attributed to the introduction of $V_{\rm o}$ detects. By introducing $V_{\rm o}$ defects, the annihilation rate of the photo-generated electron-hole pairs will be greatly slowed down, leading to a remarkable photoconductive gain. This finding informs a novel way to design the x-ray detectors based on abundant oxide materials.
收稿日期: 2019-05-20
出版日期: 2019-10-21
:
07.85.Fv
(X- and γ-ray sources, mirrors, gratings, and detectors)
71.55.Gs
(II-VI semiconductors)
29.40.Wk
(Solid-state detectors)
81.15.Cd
(Deposition by sputtering)
引用本文:
. [J]. 中国物理快报, 2019, 36(11): 110701-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/36/11/110701
或
https://cpl.iphy.ac.cn/CN/Y2019/V36/I11/110701
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2019, Vol. 36 
