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 04:00:00 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, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1250; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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