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- W89656423 abstract "The mid-infrared photoconductive cells (PCC) made of n-InAs(100) crystals with InAsSbP quantum dots (QDs) on the PCC surface, as well as InAsSbP-based diode heterostructures with QDs on epilayer–substrate interface are reported. Both QDs-based semiconductor structures are considered as attractive devices for several mid-infrared applications. The liquid phase epitaxy, AFM, TEM and STM techniques are utilized for the growth of QDs and epitaxial cap layers and their characterization, respectively. Anomalous photovoltaic effect is detected in PCC with type-II QDs. The open-circuit voltage and short-circuit current are measured versus radiation power density of the He-Ne laser at λ = 3.39, 1.15 and 0.63 μm wavelengths. The formation of QDs leads to the increasing of the PCC’s sheet resistance up to one order and results in red shift of the photoresponse spectrum. The QDs-based PCC’s voltage and current responsivity at room temperature are equal to 1.5 V/W and 82 mA/W, respectively, at zero bias and λ = 3.39 μm. The main peak at 3.48 µm and additional peaks at 2.6 µm and 2.85 µm wavelengths revealed on QDs-based devices’ photoresponse and luminescence spectra allow to fabricate optical gas sensors, in particularly, for the methane, water vapor and carbon dioxide detection." @default.
- W89656423 created "2016-06-24" @default.
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- W89656423 date "2013-06-08" @default.
- W89656423 modified "2023-09-23" @default.
- W89656423 title "InAsSbP-based Quantum Dot Mid-Infrared Photodetectors: Fabrication, Properties and Applications" @default.
- W89656423 hasPublicationYear "2013" @default.
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