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Blueshift in MgxZn1-xO alloys: nature of bandgap bowing

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Date

2008-12-23

Authors

Ashrafi, Abm
Segawa, Y

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics

Abstract

A Mg composition-dependent blueshift has been studied in MgxZn1−xO alloys deposited on 6H-SiC(0001) substrates. The localized exciton energy in MgxZn1−xO alloys for x ∼ 0.3 was blueshifted in the range 212–248 meV. The large negative bowing parameter was estimated in MgxZn1−xO alloys to be 4.72±0.84 eV. This large bandgap bowing emphasizes the Stokes shift, which has been attributed to the existence of spontaneous polarization effects due to the polar growth of MgxZn1−xO/SiC heterostructure and local compositional inhomogeneity.

Description

Keywords

energy gap, excitons, II-VI semiconductors, magnesium compounds, photoluminescence, semiconductor heterojunctions, silicon compounds, spectral line shift, wide band gap semiconductors, zinc compounds

Citation

Journal of Applied Physics 104.12 (2008): 123528/1-4

URI

http://hdl.handle.net/10440/1103
 http://digitalcollections.anu.edu.au/handle/10440/1103

Collections

ANU Research Publications

Source

Journal of Applied Physics

Type

Journal article

Book Title

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DOI

10.1063/1.3050338

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