Temperature-dependent photoluminescence of In0.5Al0.5As/Al0.25Ga0.75As self-organized quantum dots

Temperature-dependent photoluminescence of In0.5Al0.5As/Al0.25Ga0.75As self-organized quantum dots

The photoluminescence spectra of large ensembles of self-organized In0.5Al0.5As/Al0.25Ga0.75As quantum dots were studied. The spectra reveal a number of sharp peaks with energy separation and full width at half maximum values of ∼20 meV for 150 K⩽T⩽275 K. Significant changes are observed in the lumi...

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Veröffentlicht in:Journal of applied physics 1999-03, Vol.85 (5), p.2997-2999
Hauptverfasser: Phillips, J., Kamath, K., Bhattacharya, P., Venkateswaran, U.
Format: Artikel
Sprache:eng
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Zusammenfassung:The photoluminescence spectra of large ensembles of self-organized In0.5Al0.5As/Al0.25Ga0.75As quantum dots were studied. The spectra reveal a number of sharp peaks with energy separation and full width at half maximum values of ∼20 meV for 150 K⩽T⩽275 K. Significant changes are observed in the luminescence characteristics with varying temperature, which are attributed to a changing distribution of photoexcited carriers between dots.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.369618