Luminescence dynamics of bound exciton of hydrogen doped ZnO nanowires

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Title
Luminescence dynamics of bound exciton of hydrogen doped ZnO nanowires
Author(s)
Jinkyoung Yoo; Gyu-Chul Yi; Bonghwan Chon; Taiha Joo; Zhehui Wang
Publication Date
2016-08
Journal
JOURNAL OF LUMINESCENCE, v.176, no., pp.278 - 282
Publisher
ELSEVIER SCIENCE BV
Abstract
All-optical camera, converting X-rays into visible photons, is a promising strategy for high-performance X-ray imaging detector requiring high detection efficiency and ultrafast detector response time. Zinc oxide is a suitable material for all-optical camera due to its fast radiative recombination lifetime in sub-nanosecond regime and its radiation hardness. ZnO nanostructures have been considered as proper building blocks for ultrafast detectors with spatial resolution in sub-micrometer scale. To achieve remarkable enhancement of luminescence efficiency n-type doping in ZnO has been employed. However, luminescence dynamics of doped ZnO nanostructures have not been thoroughly investigated whereas undoped ZnO nanostructures have been employed to study their luminescence dynamics. Here we report a study of luminescence dynamics of hydrogen doped ZnO nanowires obtained by hydrogen plasma treatment. Hydrogen doping in ZnO nanowires gives rise to significant increase in the near-band-edge emission of ZnO and decrease in averaged photoluminescence lifetime from 300 to 140 ps at 10 K. The effects of hydrogen doping on the luminescent characteristics of ZnO nanowires were changed by hydrogen doping process variables. © 2016 Elsevier B.V. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/2582
ISSN
0022-2313
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > Journal Papers (저널논문)
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