4.6 Article

Long-Wavelength Luminescence of InSb Quantum Dots in Type II Broken-Gap Heterostructure

期刊

ELECTRONICS
卷 12, 期 3, 页码 -

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MDPI
DOI: 10.3390/electronics12030609

关键词

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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