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Growth and optical properties of strained GaAs-GaxIn1-xP core-shell nanowires

Sköld, Niklas LU ; Karlsson, Lisa LU ; Larsson, Magnus LU ; Pistol, Mats-Erik LU ; Seifert, Werner LU ; Trägårdh, Johanna LU and Samuelson, Lars LU (2005) In Nano Letters 5(10). p.1943-1947
Abstract
We have synthesized GaAs-GaxIn1-xP (0.34 < x < 0.69) core-shell nanowires by metal-organic vapor phase epitaxy. The nanowire core was grown Au-catalyzed at a low temperature (450 degrees C) where only little growth takes place on the side facets. The shell was added by growth at a higher temperature (600 degrees C), where the kinetic hindrance of the side facet growth is overcome. Photoluminescence measurements on individual nanowires at 5 K showed that the emission efficiency increased by 2 to 3 orders of magnitude compared to uncapped samples. Strain effects on the band gap of lattice mismatched core-shell nanowires were studied and confirmed by calculations based on deformation potential theory.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
5
issue
10
pages
1943 - 1947
publisher
The American Chemical Society
external identifiers
  • wos:000232623700016
  • pmid:16218714
  • scopus:27544477765
ISSN
1530-6992
DOI
10.1021/nl051304s
language
English
LU publication?
yes
id
3838b44a-746f-415b-831e-758b5f9b5a5a (old id 218572)
date added to LUP
2007-08-14 10:47:58
date last changed
2017-10-22 04:44:43
@article{3838b44a-746f-415b-831e-758b5f9b5a5a,
  abstract     = {We have synthesized GaAs-GaxIn1-xP (0.34 &lt; x &lt; 0.69) core-shell nanowires by metal-organic vapor phase epitaxy. The nanowire core was grown Au-catalyzed at a low temperature (450 degrees C) where only little growth takes place on the side facets. The shell was added by growth at a higher temperature (600 degrees C), where the kinetic hindrance of the side facet growth is overcome. Photoluminescence measurements on individual nanowires at 5 K showed that the emission efficiency increased by 2 to 3 orders of magnitude compared to uncapped samples. Strain effects on the band gap of lattice mismatched core-shell nanowires were studied and confirmed by calculations based on deformation potential theory.},
  author       = {Sköld, Niklas and Karlsson, Lisa and Larsson, Magnus and Pistol, Mats-Erik and Seifert, Werner and Trägårdh, Johanna and Samuelson, Lars},
  issn         = {1530-6992},
  language     = {eng},
  number       = {10},
  pages        = {1943--1947},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Growth and optical properties of strained GaAs-GaxIn1-xP core-shell nanowires},
  url          = {http://dx.doi.org/10.1021/nl051304s},
  volume       = {5},
  year         = {2005},
}