Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector*

doi:10.1088/1674-1056/ac0131

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	Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector*
	H. Y. Ma; K. W. Liu; Z. Cheng; Z. Y. Zheng; Y. Z. Liu; P. X. Zhang; X. Chen; D. M. Liu; L. Liu and D. Z. Shen
	2021
发表期刊	Chinese Physics B
ISSN	1674-1056
卷号	30 期号:8 页码:5
摘要	The slower response speed is the main problem in the application of ZnO quantum dots (QDs) photodetector, which has been commonly attributed to the presence of excess oxygen vacancy defects and oxygen adsorption/desorption processes. However, the detailed mechanism is still not very clear. Herein, the properties of ZnO QDs and their photodetectors with different amounts of oxygen vacancy (V-O) defects controlled by hydrogen peroxide (H2O2) solution treatment have been investigated. After H2O2 solution treatment, V-O concentration of ZnO QDs decreased. The H2O2 solution-treated device has a higher photocurrent and a lower dark current. Meanwhile, with the increase in V-O concentration of ZnO QDs, the response speed of the device has been improved due to the increase of oxygen adsorption/desorption rate. More interestingly, the response speed of the device became less sensitive to temperature and oxygen concentration with the increase of V-O defects. The findings in this work clarify that the surface V-O defects of ZnO QDs could enhance the photoresponse speed, which is helpful for sensor designing.
DOI	10.1088/1674-1056/ac0131
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65196
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. Y. Ma,K. W. Liu,Z. Cheng,et al. Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector*[J]. Chinese Physics B,2021,30(8):5.
APA	H. Y. Ma.,K. W. Liu.,Z. Cheng.,Z. Y. Zheng.,Y. Z. Liu.,...&L. Liu and D. Z. Shen.(2021).Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector*.Chinese Physics B,30(8),5.
MLA	H. Y. Ma,et al."Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector*".Chinese Physics B 30.8(2021):5.

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