Abstract
The luminescence and photoelectric properties of heterostructures with a deep Al(As)Sb/InAsSb/Al(As)Sb quantum well grown on n-GaSb substrates by metalorganic vapor-phase epitaxy are investigated. Intense superlinear luminescence and increased optical power as a function of the pump current in the photon energy range of 0.6–0.8 eV are observed at temperatures of T = 77 and 300 K. The photoelectric, current-voltage, and capacitance characteristics of these heterostructures are studied in detail. The photosensitivity is examined with photodetectors operating in the photovoltaic mode in the spectral range of 0.9–2.0 μm. The sensitivity maximum at room temperature is observed at a wavelength of 1.55 μm. The quantum efficiency, detectivity, and response time of the photodetectors were estimated. The quantum efficiency and detectivity at the peak of the photosensitivity spectrum are as high as η = 0.6–0.7 and D *λmax = (5–7) × 1010 cm Hz1/2 W−1, respectively. The photodiode response time determined as the rise time of the photoresponse pulse from 0.1 to the level 0.9 is 100–200 ps. The photodiode transmission bandwidth is 2–3 GHz. Photodetectors with a deep Al(As)Sb/InAsSb/Al(As)Sb quantum well grown on n-GaSb substrates are promising foruse in heterodyne detection systems and in information technologies.
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Original Russian Text © M.P. Mikhailova, I.A. Andreev, E.V. Ivanov, G.G. Konovalov, E.A. Grebentshikova, Yu.P. Yakovlev, E. Hulicius, A. Hospodkova, Y. Pangrac, 2013, published in Fizika i Tekhnika Poluprovodnikov, 2013, Vol. 47, No. 8, pp. 1037–1042.
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Mikhailova, M.P., Andreev, I.A., Ivanov, E.V. et al. Photoelectric and luminescence properties of GaSb-Based nanoheterostructures with a deep Al(As)Sb/InAsSb/Al(As)Sb quantum well grown by metalorganic vapor-phase epitaxy. Semiconductors 47, 1041–1045 (2013). https://doi.org/10.1134/S1063782613080137
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DOI: https://doi.org/10.1134/S1063782613080137