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Browse Journals & Magazines > Applied Physics Letters ...> Volume:96 Issue:21 Help

Surface-passivation effects on the photoluminescence enhancement in ZnS:Mn nanoparticles by ultraviolet irradiation with oxygen bubbling

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3 Author(s)
Jung, Dae-Ryong ; Department of Materials Science and Engineering and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Republic of Korea ; Kim, Jongmin ; Park, Byungwoo

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This study examined the effects of surface-passivation on the photoluminescence (PL) properties of ZnS:Mn nanoparticles treated by ultraviolet (UV) irradiation with oxygen bubbling. Compared to the pristine Mn-doped zinc-sulfide nanocrystals (quantum efficiency: ∼16%), the UV-irradiated ZnS:Mn showed significantly enhanced luminescence properties (quantum efficiency: ∼35%). The photoinduced surface passivation was characterized by x-ray diffraction, x-ray photoelectron spectroscopy, and time-resolved PL. The optimum thickness of the passivation layer for the quantum efficiency was examined considering the nanocrystal size, local strain, and radiative/nonradiative recombination rates.

Published in:
Applied Physics Letters  (Volume:96 ,  Issue: 21 )

Date of Publication: May 2010

Page(s):
211908 - 211908-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3431267
Product Type:
Journals & Magazines
Date of Current Version :
03 June 2010
Issue Date :
May 2010

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