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New Insights into the Origins of Sb-Induced Effects on Self-Catalyzed GaAsSb Nanowire Arrays.

Ren, Dingding; Dheeraj, Dasa L; Jin, Chengjun; Nilsen, Julie S; Huh, Junghwan; Reinertsen, Johannes F; Munshi, A Mazid; Gustafsson, Anders LU ; van Helvoort, Antonius T J and Weman, Helge, et al. (2016) In Nano Letters 16(2). p.1201-1209
Abstract
Ternary semiconductor nanowire arrays enable scalable fabrication of nano-optoelectronic devices with tunable bandgap. However, the lack of insight into the effects of the incorporation of Vy element results in lack of control on the growth of ternary III-V1-yVy nanowires and hinders the development of high-performance nanowire devices based on such ternaries. Here, we report on the origins of Sb-induced effects affecting the morphology and crystal structure of self-catalyzed GaAsSb nanowire arrays. The nanowire growth by molecular beam epitaxy is changed both kinetically and thermodynamically by the introduction of Sb. An anomalous decrease of the axial growth rate with increased Sb2 flux is found to be due to both the indirect kinetic... (More)
Ternary semiconductor nanowire arrays enable scalable fabrication of nano-optoelectronic devices with tunable bandgap. However, the lack of insight into the effects of the incorporation of Vy element results in lack of control on the growth of ternary III-V1-yVy nanowires and hinders the development of high-performance nanowire devices based on such ternaries. Here, we report on the origins of Sb-induced effects affecting the morphology and crystal structure of self-catalyzed GaAsSb nanowire arrays. The nanowire growth by molecular beam epitaxy is changed both kinetically and thermodynamically by the introduction of Sb. An anomalous decrease of the axial growth rate with increased Sb2 flux is found to be due to both the indirect kinetic influence via the Ga adatom diffusion induced catalyst geometry evolution and the direct composition modulation. From the fundamental growth analyses and the crystal phase evolution mechanism proposed in this Letter, the phase transition/stability in catalyst-assisted ternary III-V-V nanowire growth can be well explained. Wavelength tunability with good homogeneity of the optical emission from the self-catalyzed GaAsSb nanowire arrays with high crystal phase purity is demonstrated by only adjusting the Sb2 flux. (Less)
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Contribution to journal
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published
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Nano Letters
volume
16
issue
2
pages
1201 - 1209
publisher
The American Chemical Society
external identifiers
  • pmid:26726825
  • scopus:84959460241
  • wos:000370215200057
ISSN
1530-6992
DOI
10.1021/acs.nanolett.5b04503
language
English
LU publication?
yes
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b249567f-5d58-4d48-a777-c2d383556d35 (old id 8593295)
date added to LUP
2016-02-11 12:09:31
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2017-11-19 04:01:40
@article{b249567f-5d58-4d48-a777-c2d383556d35,
  abstract     = {Ternary semiconductor nanowire arrays enable scalable fabrication of nano-optoelectronic devices with tunable bandgap. However, the lack of insight into the effects of the incorporation of Vy element results in lack of control on the growth of ternary III-V1-yVy nanowires and hinders the development of high-performance nanowire devices based on such ternaries. Here, we report on the origins of Sb-induced effects affecting the morphology and crystal structure of self-catalyzed GaAsSb nanowire arrays. The nanowire growth by molecular beam epitaxy is changed both kinetically and thermodynamically by the introduction of Sb. An anomalous decrease of the axial growth rate with increased Sb2 flux is found to be due to both the indirect kinetic influence via the Ga adatom diffusion induced catalyst geometry evolution and the direct composition modulation. From the fundamental growth analyses and the crystal phase evolution mechanism proposed in this Letter, the phase transition/stability in catalyst-assisted ternary III-V-V nanowire growth can be well explained. Wavelength tunability with good homogeneity of the optical emission from the self-catalyzed GaAsSb nanowire arrays with high crystal phase purity is demonstrated by only adjusting the Sb2 flux.},
  author       = {Ren, Dingding and Dheeraj, Dasa L and Jin, Chengjun and Nilsen, Julie S and Huh, Junghwan and Reinertsen, Johannes F and Munshi, A Mazid and Gustafsson, Anders and van Helvoort, Antonius T J and Weman, Helge and Fimland, Bjørn-Ove},
  issn         = {1530-6992},
  language     = {eng},
  number       = {2},
  pages        = {1201--1209},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {New Insights into the Origins of Sb-Induced Effects on Self-Catalyzed GaAsSb Nanowire Arrays.},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.5b04503},
  volume       = {16},
  year         = {2016},
}