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Growth of wurtzite AlxGa1-xP nanowire shells and characterization by Raman spectroscopy

Berg, Alexander LU ; Heurlin, Magnus LU ; Tsopanidis, Stylianos; Pistol, Mats Erik LU and Borgström, Magnus T. LU (2017) In Nanotechnology 28(3).
Abstract

The phonon energies of AlGaP in wurtzite crystal structure are generally not known, as opposed to their zincblende counterparts, because AlGaP crystallizes in zincblende phase in bulk and thin films structures. However, in nanowires AlGaP can be grown in wurtzite crystal structure. In this work we have grown wurtzite GaP/AlGaP/GaP core-shell nanowires by use of MOVPE. After developing suitable growth conditions, the Al composition was determined by STEM-EDX measurements and the wurtzite AlGaP phonon energies by Raman spectroscopy. Raman measurements show a peak shift with increasing Al composition in the AlGaP shell. We find that the phonon energies for wurtzite AlGaP are slightly lower than for zincblende AlGaP. Our results can be used... (More)

The phonon energies of AlGaP in wurtzite crystal structure are generally not known, as opposed to their zincblende counterparts, because AlGaP crystallizes in zincblende phase in bulk and thin films structures. However, in nanowires AlGaP can be grown in wurtzite crystal structure. In this work we have grown wurtzite GaP/AlGaP/GaP core-shell nanowires by use of MOVPE. After developing suitable growth conditions, the Al composition was determined by STEM-EDX measurements and the wurtzite AlGaP phonon energies by Raman spectroscopy. Raman measurements show a peak shift with increasing Al composition in the AlGaP shell. We find that the phonon energies for wurtzite AlGaP are slightly lower than for zincblende AlGaP. Our results can be used to determine the Al composition in wurtzite AlGaP by Raman scattering.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
AlGaP, MOVPE, nanowire, Raman spectroscopy, wurtzite
in
Nanotechnology
volume
28
issue
3
publisher
IOP Publishing
external identifiers
  • scopus:85006474782
  • wos:000391289300002
ISSN
0957-4484
DOI
10.1088/1361-6528/28/3/035706
language
English
LU publication?
yes
id
6a6ee3bb-bb5d-48d5-b096-b5aa9e0072b5
date added to LUP
2017-02-15 08:17:24
date last changed
2018-01-07 11:49:49
@article{6a6ee3bb-bb5d-48d5-b096-b5aa9e0072b5,
  abstract     = {<p>The phonon energies of AlGaP in wurtzite crystal structure are generally not known, as opposed to their zincblende counterparts, because AlGaP crystallizes in zincblende phase in bulk and thin films structures. However, in nanowires AlGaP can be grown in wurtzite crystal structure. In this work we have grown wurtzite GaP/AlGaP/GaP core-shell nanowires by use of MOVPE. After developing suitable growth conditions, the Al composition was determined by STEM-EDX measurements and the wurtzite AlGaP phonon energies by Raman spectroscopy. Raman measurements show a peak shift with increasing Al composition in the AlGaP shell. We find that the phonon energies for wurtzite AlGaP are slightly lower than for zincblende AlGaP. Our results can be used to determine the Al composition in wurtzite AlGaP by Raman scattering.</p>},
  articleno    = {035706},
  author       = {Berg, Alexander and Heurlin, Magnus and Tsopanidis, Stylianos and Pistol, Mats Erik and Borgström, Magnus T.},
  issn         = {0957-4484},
  keyword      = {AlGaP,MOVPE,nanowire,Raman spectroscopy,wurtzite},
  language     = {eng},
  month        = {01},
  number       = {3},
  publisher    = {IOP Publishing},
  series       = {Nanotechnology},
  title        = {Growth of wurtzite Al<sub>x</sub>Ga<sub>1-x</sub>P nanowire shells and characterization by Raman spectroscopy},
  url          = {http://dx.doi.org/10.1088/1361-6528/28/3/035706},
  volume       = {28},
  year         = {2017},
}