Direct comparison on the structural and optical properties of
metal-catalytic and self-catalytic assisted gallium nitride (GaN)
nanowires by chemical vapor deposition
By:Purushothaman, V (Purushothaman, V.)[ 1 ] ; Venkatesh, PS (Venkatesh, P.
Sundara)[ 1 ] ; Navamathavan, R (Navamathavan, R.)[ 2 ] ; Jeganathan, K(Jeganathan, K.)[ 1 ]
RSC ADVANCES
Volume: 4
Issue: 85
Pages: 45100-45108
DOI: 10.1039/c4ra05388e
Published: 2014
View Journal Information
Abstract
The structural and optical properties of GaN nanowires (NWs) grown by catalytic and self-catalyticassisted vapor liquid solid approach using chemical vapor deposition (CVD) are reported. Liquid
gallium droplets were used as the nucleation centre for the growth of self-catalyst assisted NWs,
whereas pre-deposited Ni and Au thin films were employed as the seed layer for the catalyst-assisted
growth on Si (111) substrates. Electron microscopy analyses revealed that the growth rates and
densities of the structural defects of the NWs strongly vary with the nature of the catalyst. The high
resolution electron microscopy and selected area electron diffraction studies exhibit a high crystalline
quality of Ni-catalyst-assisted GaN NWs, whereas self-catalytic NWs contain defects such as stacking
faults and cubic inclusion. Temperature-dependent photoluminescence on the ensembles of NWs
illustrates the absence of the characteristic yellow luminescence band of GaN for the Ni-assisted
vapor-liquid-solid approach, implying the high optical quality of GaN NWs by CVD. The results show
that the quality of the self-catalytic GaN NWs grown by CVD is yet to be improved for device
applications.
Keywords
KeyWords Plus:LIGHT-EMITTING DEVICES; FREE EPITAXIAL-GROWTH; PHASE EPITAXY; INP
NANOWIRES; MECHANISM; DEFECTS; VLS;SILICON; PHOTOLUMINESCENCE; SEMICONDUCT
ORS
Author Information
Reprint Address: Jeganathan, K (reprint author)
Bharathidasan Univ, Sch Phys, Ctr Nanosci & Nanotechnol, Tiruchchirappalli 620024, Tamil Nadu, India.
Addresses:
[ 1 ] Bharathidasan Univ, Sch Phys, Ctr Nanosci & Nanotechnol, Tiruchchirappalli 620024, Tamil Nadu, India
[ 2 ] Chonbuk Natl Univ, Res Ctr Adv Mat Dev, Engn Coll, Semicond Mat Proc Lab,Sch Adv Mat Engn, Chonju 56
E-mail Addresses:kjeganathan@yahoo.com
Funding
Funding Agency
Department of Science and Technology (DST), Govt. of India
Grant Number
SR/NM/NS-77/2008
CSIR, Govt. of India
View funding text
Publisher
ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD,
CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Categories / Classification
Research Areas:Chemistry
Web of Science Categories:Chemistry, Multidisciplinary
Document Information
Document Type:Article
Language:English
Accession Number: WOS:000342993500031
ISSN: 2046-2069
Other Information
IDS Number: AQ7KM
Cited References in Web of Science Core Collection: 45
Times Cited in Web of Science Core Collection: 2