The effect of V/III ratio and catalyst particle size on the crystal structure and optical properties of InP nanowires.
InP nanowires were grown on 111B InP substrates by metal-organic chemical vapour deposition in the presence of colloidal gold particles as catalysts. Transmission electron microscopy and photoluminescence measurements were carried out to investigate the effects of V/III ratio and nanowire diameter on structural and optical properties. Results show that InP nanowires grow preferably in the wurtzite crystal structure than the zinc blende crystal structure with increasing V/III ratio or decreasing diameter. Additionally, time-resolved photoluminescence (TRPL) studies have revealed that wurtzite nanowires show longer recombination lifetimes of approximately 2500 ps with notably higher quantum efficiencies.
Department of Electronic Materials Engineering, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia. sbp109@rsphysse.anu.edu.au
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Paiman
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Gao
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Tan
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Jagadish
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Pemasiri
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Montazeri
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Jackson
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Smith
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Yarrison-Rice
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Zhang
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Zou