Influence of Exciton Localization on the Emission and Ultraviolet Photoresponse of ZnO/ZnS Core-Shell Nanowires

	Influence of Exciton Localization on the Emission and Ultraviolet Photoresponse of ZnO/ZnS Core-Shell Nanowires
	Fang, X.; Z. P. Wei; R. Chen; J. L. Tang; H. F. Zhao; L. G. Zhang; D. X. Zhao; D. Fang; J. H. Li; F. Fang; X. Y. Chu and X. H. Wang
	2015
发表期刊	Acs Applied Materials & Interfaces
卷号	7 期号:19 页码:10331-10336
摘要	The structural and optical properties of ZnO and ZnO/ ZnS core shell nanowires grown by a wet chemical method are investigated. The near-bandgap ultraviolet (UV) emission of the ZnO nanowires was enhanced by four times after coating with ZnS. The enhanced emission was attributed to surface passivation Of the ZnO nanowires and localized states introduced during ZnS growth. The emission of the ZnO and ZnO/ZnS core shell nanowires was attributed to neutral donor-bound excitons and localized excitons, respectively. Localized states prevented excitons from diffusing to nonradiative recombination centers, so therefore contributed to the enhanced emission. Emission from the localized exciton was not sensitive to temperature, so emission from the ZnO/ZnS core shell nanowires was more stable at higher temperature. UV photodetectors based on the ZnO and ZnO/ZnS core shell nanowires were fabricated. Under UV excitation, the device based on the ZnO/ZnS core shell nanowires exhibited a photocurrent approximately 40 times higher than that of the device based on the ZnO nanowires. The differing photoresponse of the detectors was consistent with the existence of surface passivation and localized states. This study provides a means for modifying the optical properties of ZnO materials, and demonstrates the potential of ZnO/ZnS core shell nanowires in UV excitonic emission and detection.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55239
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Fang, X.,Z. P. Wei,R. Chen,et al. Influence of Exciton Localization on the Emission and Ultraviolet Photoresponse of ZnO/ZnS Core-Shell Nanowires[J]. Acs Applied Materials & Interfaces,2015,7(19):10331-10336.
APA	Fang, X..,Z. P. Wei.,R. Chen.,J. L. Tang.,H. F. Zhao.,...&X. Y. Chu and X. H. Wang.(2015).Influence of Exciton Localization on the Emission and Ultraviolet Photoresponse of ZnO/ZnS Core-Shell Nanowires.Acs Applied Materials & Interfaces,7(19),10331-10336.
MLA	Fang, X.,et al."Influence of Exciton Localization on the Emission and Ultraviolet Photoresponse of ZnO/ZnS Core-Shell Nanowires".Acs Applied Materials & Interfaces 7.19(2015):10331-10336.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Fang-2015-Influence （469KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载