The effect of V/III ratio and catalyst particle size on the crystal structure and optical properties of InPnanowires

S Paiman; Q Gao; H H Tan; C Jagadish; K Pemasiri; M Montazeri; H E Jackson; L M Smith; J M Yarrison-Rice; X Zhang; J Zou

doi:10.1088/0957-4484/20/22/225606

Nanotechnology

The effect of V/III ratio and catalyst particle size on the crystal structure and optical properties of InP nanowires

S Paiman¹, Q Gao¹, H H Tan¹, C Jagadish¹, K Pemasiri², M Montazeri², H E Jackson², L M Smith², J M Yarrison-Rice³, X Zhang⁴ and J Zou⁴

Published 13 May 2009 • IOP Publishing Ltd
Nanotechnology, Volume 20, Number 22 Citation S Paiman et al 2009 Nanotechnology 20 225606 DOI 10.1088/0957-4484/20/22/225606

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¹ Department of Electronic Materials Engineering, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia

² Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA

³ Department of Physics, Miami University, Oxford, OH 45056, USA

⁴ School of Engineering and Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, QLD 4072, Australia

Dates

Received 12 February 2009
Published 13 May 2009

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Abstract

InP nanowires were grown on (111)B 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 ∼2500 ps with notably higher quantum efficiencies.

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