Time-resolved photoluminescence investigation of (Mg, Zn) O alloy growth on a non-polar plane

Creators: Ali, Mohammed Jassim Mohammed; Chauveau, J. M.; Bretagnon, Thierry

Others:: Laboratoire Charles Coulomb (L2C) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS); Physique de l'Exciton, du Photon et du Spin (PEPS) ; Laboratoire Charles Coulomb (L2C) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS); Centre de recherche sur l'hétéroepitaxie et ses applications (CRHEA) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)

Description

Excitons recombination dynamics in ZnMgO alloy have been studied by time-resolved photoluminescence according to temperature. At low temperature, localization effects of the exciton are found to play a significant role. The photoluminescence (PL) decays are bi-exponential. The short lifetime has a constant value, whereas the long lifetime shows a dependency with temperature. For temperature higher than 100 K the declines show an mono-exponential decay. The PL declines are dominated by non-radiative process at temperatures above 150 K. The PL lifetime dependancy with temperature is analysed using a model including localisation effects and non-radiative recombinations.

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Time-resolved photoluminescence investigation of (Mg, Zn) O alloy growth on a non-polar plane

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