The Study of Energy Band Gap of Al{sub x}In{sub y}Ga{sub 1-x-y}N Quaternary Alloys Using UV-VIS Spectroscopy

Journal Article · Wed Jul 07 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3469662· OSTI ID:21415266

Abid, M A; Hassan, H Abu; Hassan, Z; Ng, S S; Raof, N H. Abd.; Bakhori, S K. Mohd ^[1]

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1. Nano-Optoelectronics Research and Technology Laboratory, School of Physics, Universiti Sains Malaysia, 11800 Minden, Penang (Malaysia)

Optical characterizations have been performed on high-quality quaternary Al{sub x}In{sub y}Ga{sub 1-x-y}N thin films using UV-VIS spectroscopy at room temperature. The Al{sub x}In{sub y}Ga{sub 1-x-y}N films were grown on c-plane (0001) sapphire substrates with AlN as buffer layers using molecular beam epitaxy (MBE) technique with aluminum (Al) mole fraction x ranging from 0.0 to 0.2 and constant indium (In) mole fraction y = 0.1. The UV-VIS measurements indicated that the energy band gap of the quaternary films increases with increasing Al composition from 0.05 to 0.2. This trend is expected since the incorporation of Al increases the energy band gap of ternary In0.1Ga0.90N (3.004eV). We have also investigated the bowing parameter of the variation of energy band gaps and found it to be very sensitive on Al content. A value of b=7 eV has been obtained for our quaternary Al{sub x}In{sub y}Ga{sub 1-x-y}N alloys.

• OSTI ID: 21415266
• Journal Information: AIP Conference Proceedings, Vol. 1250, Issue 1; Conference: PERFIK2009: National physics conference 2009, Malacca (Malaysia), 7-9 Dec 2009; Other Information: DOI: 10.1063/1.3469662; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ALUMINIUM ALLOYS
ALUMINIUM NITRIDES
BUFFERS
ENERGY GAP
GALLIUM ALLOYS
INDIUM ALLOYS
LAYERS
MOLECULAR BEAM EPITAXY
NITRIDATION
NITROGEN COMPOUNDS
OPTICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
SPECTROSCOPY
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
ULTRAVIOLET RADIATION
ALLOY SYSTEMS
ALLOYS
ALUMINIUM COMPOUNDS
CHEMICAL REACTIONS
CRYSTAL GROWTH METHODS
ELECTROMAGNETIC RADIATION
ELEMENTS
EPITAXY
FILMS
METALS
NITRIDES
PHYSICAL PROPERTIES
PNICTIDES
RADIATIONS
TEMPERATURE RANGE