Optical and structural properties of epitaxial Mg{sub x}Zn{sub 1{minus}x}O alloys

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.125340· OSTI ID:698827

Sharma, A K; Narayan, J; Muth, J F; Teng, C W; Jin, C; Kvit, A; Kolbas, R M; Holland, O W ^[1]

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1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916 (United States)

The optical and structural properties of high-quality single-crystal epitaxial MgZnO films deposited by pulsed-laser deposition were studied. In films with up to {approximately}36 at.&hthinsp;{percent} Mg incorporation, we have observed intense ultraviolet band edge photoluminescence at room temperature and 77 K. The highly efficient photoluminescence is indicative of the excitonic nature of the material. Transmission spectroscopy was used to show that the excitonic structure of the alloys was clearly visible at room temperature. High-resolution transmission electron microscopy, x-ray diffraction, and Rutherford backscattering spectroscopy/ion channeling were used to verify the epitaxial single-crystal quality of the films and characterize the defect content. Post-deposition annealing in oxygen was found to reduce the number of defects and to improve the optical properties of the films. These results indicate that MgZnO alloys have potential applications in a variety of optoelectronic devices. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 698827
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 75; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTAL DEFECTS
EPITAXY
EXCITONS
ION CHANNELING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
PHOTOLUMINESCENCE
RUTHERFORD SCATTERING
STRUCTURAL CHEMICAL ANALYSIS
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
X-RAY DIFFRACTION
ZINC COMPOUNDS
ZINC OXIDES