Journal
ELECTRONICS
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/electronics12030609
Keywords
quantum dots; electroluminescence; InAs; InSb; type II heterojunction
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The electroluminescence spectra of narrow-gap type II InAs/InSb/InAs heterostructures containing InSb quantum dots were studied. The luminescent properties of the heterostructures were investigated under forward and reverse bias in the temperature range of 77-300 K. Suppression of negative interband luminescence and dominance of interface recombination transitions were observed at the InSb/InAs type II heterojunction when applying reverse bias at room temperature. Recombination transitions involving localized electron-hole states of the InSb quantum dots were revealed and recorded at low temperatures.
The features of the electroluminescence spectra of narrow-gap type II InAs/InSb/InAs heterostructures containing a single layer of InSb quantum dots placed into the p-n-InAs junction were studied. The luminescent properties of the heterostructures under a forward and reverse bias in the temperature range of 77-300 K were investigated as a function of the surface density of nano-objects buried in the narrow-gap matrix. When applying the reverse bias to the heterostructures under study, the suppression of negative interband luminescence and the dominance of interface recombination transitions at the InSb/InAs type II heterojunction were observed at room temperature. The radiation, which corresponded to recombination transitions involving localized electron-hole states of the InSb quantum dots, was revealed and recorded at low temperatures.
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