Ultraintense UV emission from ZnO-sheathed ZnS nanorods

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486665.do
DOI
10.1038/s41598-017-13556-0
Title
Ultraintense UV emission from ZnO-sheathed ZnS nanorods
Description
This study was supported by the Basic Science Research Program throughthe National Research Foundation of Korea (NRF) funded by the Ministryof Education (2015R1D1A1A01057029 and 2010-0020163).
abstract
Short-wavelength luminescence is essential for high-performance optoelectronic device applications. There have been efforts to obtain intense ultraviolet (UV) emission by encapsulating ZnO onedimensional (1D) nanostructures with materials such as ZnS. However, the encapsulation of ZnS 1D nanostructures with ZnO has not been reported. In this paper, we report ultraintense UV emission from ZnS nanorods coated with ZnO, i. e., ZnS-core/ZnO-shell nanorods. UV emission from the ZnS-core/ZnO-shell nanorods was much more intense than that obtained from the extensively studied ZnO-core/ZnS- shell nanorods. The highest intensity of the near-band-edge emission from the ZnS-core/ZnOshell nanorods was obtained with a ZnO shell layer thickness of 35 nm, which is similar to 16 times higher than that of pristine ZnS nanorods. Moreover, the deep level (DL) emission was suppressed completely. The substantial enhancement of the UV emission from the ZnS nanorods and the complete suppression of the DL emission by ZnO sheathing can be rationalized by combining the following four effects: the reinforcement of the UV emission by the overlap of the UV emissions from the ZnS core and ZnO shell, enhancement of the emission from the ZnO shell by the carrier transfer from the ZnS core to the ZnO shell, suppression of the capture of carriers by the surface states on the ZnS surface, and suppression of the visible emission and nonradiative recombination in ZnS.
provenance
Made available in Cube on 2018-09-28T16:13:40Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Jae Kyung
Sun, Gun-Joo
Lee, Woo Seok
Hyun, Soong Keun
Kim, Kyoung-Kook
Choi, Seung-Bok
Lee, Chongmu
accessioned
2018-09-28T16:13:40Z
available
2018-09-28T16:13:40Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486665.do
Funder
산업통상자원부
Funding Program
산업전문인력역량강화(산업부)
Project ID
1415156273
Jurisdiction
Rep.of Korea
Project Name
Professional manpower traning system construction for Ppuri Industry
rights
openAccess
type
article


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