Luminescence dynamics of bound exciton of hydrogen doped ZnO nanowires
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Seoul National Univ., Seoul (Republic of Korea)
- POSTECH, Pohang (Republic of Korea)
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.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 0417-20140099; AC52-06NA25396; AC04-94AL85000; 2011-0001215
- OSTI ID:
- 1248729
- Alternate ID(s):
- OSTI ID: 1426294
- Report Number(s):
- LA-UR-15-22144; PII: S002223131530394X
- Journal Information:
- Journal of Luminescence, Vol. 176, Issue C; ISSN 0022-2313
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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