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Author

Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Improving the composition uniformity of Au-catalyzed InGaAs nanowires on silicon

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Title
Improving the composition uniformity of Au-catalyzed InGaAs nanowires on silicon
Author
Shin, Jae CheolKim, Do YangLee, AriKim, Hyo JinKim, Jae HunChoi, Won JunKim, Hyun-SeokChoi, Kyoung Jin
Keywords
Core shell structure; Energy dispersive x-ray spectroscopy; In compositions; Nanowires (NWs); Semi conducting III-V materials; Si (1 1 1); V/III ratio; Vapor-solid
Issue Date
201306
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF CRYSTAL GROWTH, v.372, no., pp.15 - 18
Abstract
Spatial distribution of indium (In) atoms in ternary InxGa1-xAs nanowires (NWs) was investigated by the energy-dispersive X-ray spectroscopy, which were grown on Si (111) by metal-organic chemical vapor deposition. The NWs have a tapered morphology with thicker diameter and higher In composition in the bottom of NWs. However, decreasing growth temperature and Will ratio resulted in straight NWs with constant In composition throughout the NWs. This was attributed to enhanced deposition on the sidewall of the NW with higher In composition through the vapor-solid mode, leading to a core-shell structure consisting of low and high In-content layers.
URI
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DOI
http://dx.doi.org/10.1016/j.jcrysgro.2013.02.025
ISSN
0022-0248
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