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Formation and photoluminescence of Ge and Si nanoparticles encapsulated in oxide layers

Oku, Takeo ; Nakayama, Tadachika ; Kuno, Masaki ; Nozue, Yasuo ; Wallenberg, LR LU ; Niihara, Koichi and Suganuma, Katsuaki (2000) In Materials Science and Engineering B: Solid-State Materials for Advanced Technology 74. p.242-247
Abstract
Ge and Si semiconductor nanoparticles encapsulated in oxide layers were prepared by the inert gas condensation method. High-resolution electron microscopy and energy dispersive X-ray spectrometry showed the formation of the core-shell structures with a size below 10 nm. The optical absorption spectra of Ge showed the band edges at higher energy compared to the ordinary Ge element. Photoluminescence measurements of them showed the luminescence at 2.2-2.6 eV, which would be due to the formation of core-shell structures. Especially, Ge clusters with a size of approximately 1 nm were formed in the GeOx matrix, which showed strong luminescence at 3.12 eV, which would be due to the quantum size effect of the clusters. The present work indicates... (More)
Ge and Si semiconductor nanoparticles encapsulated in oxide layers were prepared by the inert gas condensation method. High-resolution electron microscopy and energy dispersive X-ray spectrometry showed the formation of the core-shell structures with a size below 10 nm. The optical absorption spectra of Ge showed the band edges at higher energy compared to the ordinary Ge element. Photoluminescence measurements of them showed the luminescence at 2.2-2.6 eV, which would be due to the formation of core-shell structures. Especially, Ge clusters with a size of approximately 1 nm were formed in the GeOx matrix, which showed strong luminescence at 3.12 eV, which would be due to the quantum size effect of the clusters. The present work indicates that formation of the core-shell structure of semiconductor nanoparticles with oxide layers would be effective for blue shifts of the energy band. 2000 Elsevier Science S.A. All rights reserved. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
HREM, semiconductors, atomic structure, nanoparticles, photoluminescence, optical property
in
Materials Science and Engineering B: Solid-State Materials for Advanced Technology
volume
74
pages
6 pages
publisher
Elsevier Science Publishers B.V.
external identifiers
  • scopus:0033749835
ISSN
0921-5107
DOI
10.1016/S0921-5107(99)00569-3
language
English
LU publication?
no
id
5ffe8958-ee11-4f3d-bacf-1e4e182808bd
date added to LUP
2023-10-31 16:22:12
date last changed
2023-11-02 13:13:44
@article{5ffe8958-ee11-4f3d-bacf-1e4e182808bd,
  abstract     = {{Ge and Si semiconductor nanoparticles encapsulated in oxide layers were prepared by the inert gas condensation method. High-resolution electron microscopy and energy dispersive X-ray spectrometry showed the formation of the core-shell structures with a size below 10 nm. The optical absorption spectra of Ge showed the band edges at higher energy compared to the ordinary Ge element. Photoluminescence measurements of them showed the luminescence at 2.2-2.6 eV, which would be due to the formation of core-shell structures. Especially, Ge clusters with a size of approximately 1 nm were formed in the GeOx matrix, which showed strong luminescence at 3.12 eV, which would be due to the quantum size effect of the clusters. The present work indicates that formation of the core-shell structure of semiconductor nanoparticles with oxide layers would be effective for blue shifts of the energy band. 2000 Elsevier Science S.A. All rights reserved.}},
  author       = {{Oku, Takeo and Nakayama, Tadachika and Kuno, Masaki and Nozue, Yasuo and Wallenberg, LR and Niihara, Koichi and Suganuma, Katsuaki}},
  issn         = {{0921-5107}},
  keywords     = {{HREM; semiconductors; atomic structure; nanoparticles; photoluminescence; optical property}},
  language     = {{eng}},
  month        = {{05}},
  pages        = {{242--247}},
  publisher    = {{Elsevier Science Publishers B.V.}},
  series       = {{Materials Science and Engineering B: Solid-State Materials for Advanced Technology}},
  title        = {{Formation and photoluminescence of Ge and Si nanoparticles encapsulated in oxide layers}},
  url          = {{http://dx.doi.org/10.1016/S0921-5107(99)00569-3}},
  doi          = {{10.1016/S0921-5107(99)00569-3}},
  volume       = {{74}},
  year         = {{2000}},
}