Enhanced growth and properties of non-catalytic GaAs nanowires via Sb surfactant effects Article Swipe

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Akhil Ajay , Hyowon W. Jeong , T. Schreitmüller , Markus Döblinger , Daniel Ruhstorfer , Nitin Mukhundhan , P. A. L. M. Koolen , Jonathan J. Finley , Gregor Koblmüller ·

YOU? · · 2022 · Open Access · · DOI: https://doi.org/10.1063/5.0095952

We report the effects of antimony (Sb) surfactant on the growth and correlated structural and optical properties of non-catalytic GaAs nanowires (NW) grown by selective area epitaxy on silicon. Strong enhancements in the axial growth with very high aspect ratio up to 50 are observed by the addition of small traces of Sb (1%–2%), contrasting the commonly reported growth limiting behavior of Sb in GaAs(Sb) NWs. The Sb surfactant effect modifies the growth facet structure from a pyramidal-shaped growth front terminated by {1–1–0} planes to a flat (111)B growth plane, that is even further improved by the presence of Si co-dopants. Additional benefits are seen by the substantial change in microstructure, from a heavily defected layer stacking in Sb-free GaAs NWs to a twinned phase-pure zinc blende structure in Sb-mediated GaAs(Sb) NWs. We directly confirm the impact of the altered microstructure on the optical emission and carrier recombination dynamics via observation of long, few-ns carrier lifetimes in the GaAs(Sb) NWs using steady-state and time-resolved photoluminescence spectroscopy.

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Photoluminescence Materials science Microstructure Antimony Nanowire Stacking Facet (psychology) Optoelectronics Epitaxy Silicon Layer (electronics) Nanotechnology Chemistry Composite material Metallurgy Personality Organic chemistry Social psychology Psychology Big Five personality traits

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Type: article
Language: en
Landing Page: https://doi.org/10.1063/5.0095952
PDF: https://aip.scitation.org/doi/pdf/10.1063/5.0095952
OA Status: hybrid
Cited By: 16
References: 46
Related Works: 10
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DOI: https://doi.org/10.1063/5.0095952

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Title: Enhanced growth and properties of non-catalytic GaAs nanowires via Sb surfactant effects

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Language: en

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Publication year: 2022

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Publication date: 2022-08-15

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Authors: Akhil Ajay, Hyowon W. Jeong, T. Schreitmüller, Markus Döblinger, Daniel Ruhstorfer, Nitin Mukhundhan, P. A. L. M. Koolen, Jonathan J. Finley, Gregor Koblmüller

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Landing page: https://doi.org/10.1063/5.0095952

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Concepts: Photoluminescence, Materials science, Microstructure, Antimony, Nanowire, Stacking, Facet (psychology), Optoelectronics, Epitaxy, Silicon, Layer (electronics), Nanotechnology, Chemistry, Composite material, Metallurgy, Personality, Organic chemistry, Social psychology, Psychology, Big Five personality traits

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Cited by: 16

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