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    Luminescence dynamics in AlGaN with AlN content of 20%

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    Type
    Article
    Authors
    Soltani, Sonia
    Bouzidi, Mouhamed
    Touré, Alhousseynou
    Gerhard, Marina
    Halidou, Ibrahim
    Chine, Zied
    El Jani, Belgacem
    Shakfa, Mohammad Khaled
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Photonics Laboratory
    Date
    2016-12-14
    Online Publication Date
    2016-12-14
    Print Publication Date
    2017-04
    Permanent link to this record
    http://hdl.handle.net/10754/622780
    
    Metadata
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    Abstract
    Optical properties and carrier dynamics of an AlGaN layer with an AlN content of 20% have been studied using time-resolved photoluminescence (TR-PL). Despite the high density of defects due to the relatively high AlN content, an intense PL emission from the sample has been detected. Low-temperature PL spectra exhibit several features, accompanied by a strong emission-wavelength dependence of the PL decay time. A significant red-shift of more than 200 meV from the band edge is recorded for the PL emission from localized states. Temperature-dependent PL spectra of the sample are dominated by the emission from localized states and, furthermore, show a relatively slight decrease by almost an order of magnitude with increasing temperature from 45 to 300 K. Our observations indicate strong, spatial localization effects of carriers, resulting in an increase in the radiative recombination rate.
    Citation
    Soltani S, Bouzidi M, Touré A, Gerhard M, Halidou I, et al. (2016) Luminescence dynamics in AlGaN with AlN content of 20%. physica status solidi (a): e201600481. Available: http://dx.doi.org/10.1002/pssa.201600481.
    Sponsors
    Financial support from the Tunisian General Directorate of Scientific and Technical Research (DGRST) is gratefully acknowledged. The authors are very grateful to Prof. Dr. Martin Koch of the Physics department of the Philipp University of Marburg for giving the opportunity to perform time-resolved photoluminescence measurements in his laboratories. The authors would like to thank the CRHEA CNRS Sophia-Antipolis for SEM analysis.
    Publisher
    Wiley
    Journal
    physica status solidi (a)
    DOI
    10.1002/pssa.201600481
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/pssa.201600481/full
    ae974a485f413a2113503eed53cd6c53
    10.1002/pssa.201600481
    Scopus Count
    Collections
    Articles; Photonics Laboratory; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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