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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [2]
  1. Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Tahsueh Rd., Hsinchu 30050, Taiwan (China)
  2. Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Tahsueh Rd., Hsinchu 30050, Taiwan (China), E-mail: wfhsieh@mail.nctu.edu.tw
Publication Date:
OSTI Identifier:
21015763
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Pan, C.-J., Hsu, H.-C., Cheng, H.-M., Wu, C.-Y., and Hsieh, W.-F.. Structural and optical properties of ZnMgO nanostructures formed by Mg in-diffused ZnO nanowires. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2007.01.014.
Pan, C.-J., Hsu, H.-C., Cheng, H.-M., Wu, C.-Y., & Hsieh, W.-F.. Structural and optical properties of ZnMgO nanostructures formed by Mg in-diffused ZnO nanowires. United States. doi:10.1016/j.jssc.2007.01.014.
Pan, C.-J., Hsu, H.-C., Cheng, H.-M., Wu, C.-Y., and Hsieh, W.-F.. Sun . "Structural and optical properties of ZnMgO nanostructures formed by Mg in-diffused ZnO nanowires". United States. doi:10.1016/j.jssc.2007.01.014.
@article{osti_21015763,
title = {Structural and optical properties of ZnMgO nanostructures formed by Mg in-diffused ZnO nanowires},
author = {Pan, C.-J. and Hsu, H.-C. and Cheng, H.-M. and Wu, C.-Y. and Hsieh, W.-F.},
abstractNote = {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.},
doi = {10.1016/j.jssc.2007.01.014},
journal = {Journal of Solid State Chemistry},
number = 4,
volume = 180,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}