Photoluminescence characterization of Zn{sub 1-x}Mg{sub x}O epitaxial thin films grown on ZnO by radical source molecular beam epitaxy

Journal Article · Mon Mar 19 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2715475· OSTI ID:20960171

Shibata, H; Tampo, H; Matsubara, K; Yamada, A; Sakurai, K; Ishizuka, S; Niki, S; Sakai, M ^[1]

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1. National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)

The authors report that high-quality Zn{sub 1-x}Mg{sub x}O alloys are very brilliant light emitters, even more brilliant than ZnO, particularly in the high-temperature region; both the emission bandwidth and the oscillator strength of the photoluminescence from Zn{sub 1-x}Mg{sub x}O alloys increase remarkably with increasing Mg composition ratio x. The authors have revealed that the increase in the oscillator strength is mainly due to the increase in the activation energy required for the nonradiative recombination processes. Therefore, it is suggested that the localization of excitons, because of the compositional fluctuation, takes place in Zn{sub 1-x}Mg{sub x}O alloys and that the degree of the localization increases with increasing x.

• OSTI ID: 20960171
• Journal Information: Applied Physics Letters, Vol. 90, Issue 12; Other Information: DOI: 10.1063/1.2715475; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
CRYSTAL GROWTH
EXCITONS
LAYERS
MAGNESIUM ALLOYS
MAGNESIUM OXIDES
MOLECULAR BEAM EPITAXY
OSCILLATOR STRENGTHS
PHOTOLUMINESCENCE
RECOMBINATION
SEMICONDUCTOR MATERIALS
THIN FILMS
VISIBLE RADIATION
ZINC ALLOYS
ZINC OXIDES