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This content will become publicly available on April 11, 2017

Title: Luminescence dynamics of bound exciton of hydrogen doped ZnO nanowires

In this study, 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.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Seoul National Univ., Seoul (Republic of Korea)
  3. POSTECH, Pohang (Republic of Korea)
Publication Date:
OSTI Identifier:
1248729
Report Number(s):
LA-UR--15-22144
Journal ID: ISSN 0022-2313; PII: S002223131530394X
Grant/Contract Number:
0417-20140099; AC52-06NA25396; AC04-94AL85000; 2011-0001215
Type:
Accepted Manuscript
Journal Name:
Journal of Luminescence
Additional Journal Information:
Journal Volume: 176; Journal Issue: C; Journal ID: ISSN 0022-2313
Publisher:
Elsevier
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY