Type
ArticleAuthors
Soltani, SoniaBouzidi, 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) DivisionPhotonics Laboratory
Date
2016-12-14Online Publication Date
2016-12-14Print Publication Date
2017-04Permanent link to this record
http://hdl.handle.net/10754/622780
Metadata
Show full item recordAbstract
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
WileyJournal
physica status solidi (a)Additional Links
http://onlinelibrary.wiley.com/doi/10.1002/pssa.201600481/fullae974a485f413a2113503eed53cd6c53
10.1002/pssa.201600481