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Energy gaps and optical properties for the quaternary Al x Ga y In1−x−y N matched to GaN substrate
- Source :
-
Materials Chemistry & Physics . May2009, Vol. 115 Issue 1, p122-125. 4p. - Publication Year :
- 2009
-
Abstract
- Abstract: Information on the energy band gaps, the lattice parameters and the lattice matching to available substrates is a prerequisite for many practical applications. A pseudopotential formalism within the virtual crystal approximation is used to the zinc-blende Al x Ga y In1−x−y N quaternary alloys lattice matched to GaN substrate to predict their energy band gaps and optical properties. The range of compositions for which the alloy is lattice-matched to GaN is determined. Very good agreement is obtained between the calculated values and the available experimental data. The compositional dependence of direct and indirect band gaps and dielectric constants has been investigated. The information derived from this study may be useful for ultraviolet optoelectronic applications. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 115
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 36765607
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2008.11.036