Self-assembled growth of catalyst-free GaN wires by metal-organic vapour phase epitaxy

Nanotechnology
R KoesterJ Eymery

Abstract

A catalyst-free method for growing self-assembled GaN wires on c-plane sapphire substrates by metal-organic vapour phase epitaxy is developed. This approach, based on in situ deposition of a thin SiN(x) layer (approximately 2 nm), enables epitaxial growth of c-oriented wires with 200-1500 nm diameters and a large length/diameter ratio (>100) on c-plane sapphire substrate. Detailed study of the growth mechanisms shows that a combination of key parameters is necessary to obtain vertical growth. In particular, the duration of the SiN(x) deposition prior to the wire growth is critical for controlling the epitaxy with the substrate. The GaN seed nucleation time determines the mean size diameter and structural quality, and a high Si-dopant concentration promotes vertical growth. Such GaN wires exhibit UV-light emission centred at approximately 350 nm and a weak yellow band (approximately 550 nm) at low temperature.

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Citations

Nov 28, 2013·ACS Applied Materials & Interfaces·Yasuhisa NaitohTakao Ishida
Feb 19, 2013·Journal of Agricultural and Food Chemistry·Eszter MandakLaura Nyström
Jan 8, 2014·Nano Letters·Geoffrey AvitAgnès Trassoudaine
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Jun 23, 2016·ACS Photonics·Nan GuanMaria Tchernycheva
Sep 18, 2015·ACS Applied Materials & Interfaces·A MessanviM Tchernycheva
Sep 1, 2015·ACS Nano·Stéphane LabatOlivier Thomas
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Nov 19, 2015·Nanoscale Research Letters·Vladimir NeplokhMaria Tchernycheva
Mar 12, 2015·Nano Letters·Robert KoesterFranz-Josef Tegude
Sep 13, 2016·ACS Applied Materials & Interfaces·Hezhi ZhangMaria Tchernycheva
Jan 20, 2017·Nano Letters·Damien SalomonGema Martínez-Criado
Apr 26, 2017·Nano Letters·Christophe DurandNicolas Grandjean
Oct 25, 2017·Nanotechnology·Fatemesadat MohammadiHans-Peter Wagner
May 29, 2010·Nanotechnology·Massimo CuscunàFaustino Martelli
Aug 28, 2014·Nanotechnology·S SalomonE Pauliac-Vaujour
Nov 20, 2020·Nanomaterials·Nan GuanMaria Tchernycheva
Sep 8, 2020·ACS Applied Materials & Interfaces·Vincent GrenierChristophe Durand
Aug 7, 2019·Chemical Reviews·Enrique BarrigónLars Samuelson
Jan 18, 2018·ACS Applied Materials & Interfaces·Amine El KacimiJoël Eymery
Mar 27, 2020·ACS Applied Materials & Interfaces·Akanksha KapoorChristophe Durand

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