Excitonic localization in AlN-rich AlxGa1-xN/AlyGa1-yN multi-quantum-well grain boundaries

Ajia, Idris A. and Edwards, P. R. and Liu, Z. and Yan, J. C. and Martin, R. W. and Roqan, I. S. (2014) Excitonic localization in AlN-rich AlxGa1-xN/AlyGa1-yN multi-quantum-well grain boundaries. Applied Physics Letters, 105 (12). 122111. ISSN 0003-6951

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    Abstract

    AlGaN/AlGaN multi-quantum-wells (MQW) with AlN-rich grains have been grown by metal organic chemical vapor deposition. The grains are observed to have strong excitonic localization characteristics that are affected by their sizes. The tendency to confine excitons progressively intensifies with increasing grain boundary area. Photoluminescence results indicate that the MQW have a dominant effect on the peak energy of the near-bandedge emission at temperatures below 150 K, with the localization properties of the grains becoming evident beyond 150 K. Cathodoluminescence maps reveal that the grain boundary has no effect on the peak intensities of the AlGaN/AlGaN samples.

    Author(s):Ajia, Idris A., Edwards, P. R. ORCID logoORCID: https://orcid.org/0000-0001-7671-7698, Liu, Z., Yan, J. C., Martin, R. W. ORCID logoORCID: https://orcid.org/0000-0002-6119-764X and Roqan, I. S.
    Item type:Article
    ID code:49377
    Notes:. Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
    Keywords:multi-quantum-wells, MQW, AlN-rich grains, excitonic localization, AlGaN/AlGaN MQW, Physics, Physics and Astronomy (miscellaneous)
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Technology and Innovation Centre > Bionanotechnology
    Technology and Innovation Centre > Photonics
    Depositing user: Pure Administrator
    Date deposited:26 Sep 2014 09:29
    Last modified:20 Jan 2020 19:47
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/49377
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