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

被引：29

作者：

Jung, Dae-Ryong ^{[1
]}

Kim, Jongmin

Park, Byungwoo

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 21期

基金：

新加坡国家研究基金会;

关键词：

bubbles; II-VI semiconductors; manganese; nanoparticles; passivation; photoluminescence; ultraviolet radiation effects; wide band gap semiconductors; X-ray diffraction; X-ray photoelectron spectra; zinc compounds; CDSE QUANTUM DOTS; LUMINESCENT NANOCRYSTALS; CRYSTALLITES; POLYMER; STRAIN;

D O I：

10.1063/1.3431267

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

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: similar to 16%), the UV-irradiated ZnS:Mn showed significantly enhanced luminescence properties (quantum efficiency: similar to 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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3431267]

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