Structural and optical properties of ZnMgO nanostructures formed by Mg in-diffused ZnO nanowires

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.01.014· OSTI ID:21015763

Pan, C -J ^[1]; Hsu, H -C ^[1]; Cheng, H -M ^[1]; Wu, C -Y ^[1]

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1. Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Tahsueh Rd., Hsinchu 30050, Taiwan (China)

ZnMgO nanostructures with wurtzite phase were prepared by thermal diffusion of Mg into the ZnO nanowires. As ZnO light-emitting devices have been operated by using ZnMgO layers as energy barrier layers to confine the carriers, it is essential to realize the characterization of ZnMgO particularly. In this work, the Mg content in Zn{sub 1} {sub -x} Mg {sub x} O alloy determined by X-ray diffraction (XRD) and photoluminescence (PL) shows a good coincidence. The variation of lattice constant and the blueshift of near-band-edge emission indicate that Zn{sup 2+} ions are successfully substituted by Mg{sup 2+} ions in the ZnO lattice. In Raman-scattering studies, the change of E {sub 2}(high) phonon line shape in ZnO:Mg nanostructures reveals the microscopic substitutional disorder. In addition to the host phonons of ZnO, two additional bands around 383 and 510 cm{sup -1} are presumably attributed to the Mg-related vibrational modes. - Graphical abstract: We reported the synthesis of the ZnMgO nanostructures prepared by a simple vapor transport method. Magnesium-related anomalous modes are observed by Raman spectra for the first time in ZnMgO system.

• OSTI ID: 21015763
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 4; Other Information: DOI: 10.1016/j.jssc.2007.01.014; PII: S0022-4596(07)00033-3; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LATTICE PARAMETERS
LAYERS
MAGNESIUM ALLOYS
MAGNESIUM IONS
OPTICAL PROPERTIES
OXYGEN ADDITIONS
PHONONS
PHOTOLUMINESCENCE
QUANTUM WIRES
RAMAN EFFECT
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SYNTHESIS
THERMAL DIFFUSION
VISIBLE RADIATION
X-RAY DIFFRACTION
ZINC ALLOYS
ZINC IONS
ZINC OXIDES