Abstract
Utilizing Sb-based bulk epilayers on large-scale low-cost substrates such as GaAs for fabricating infrared (IR) photodetectors is presently attracting significant attention worldwide. For this study, three sample series of GaAsxSb1−x, In1−xGaxSb, and InAsxSb1−x with different compositions were grown on semi-insulating GaAs substrates by using molecular beam epitaxy (MBE) and appropriate InAs quantum dots (QDs) as a defect-reduction buffer layer. Photoluminescence (PL) signals from these samples were observed over a wide IR wavelength range from 2 μm to 12 μm in agreement with the expected bandgap, including bowing effects. In particular, interband PL signals from InAsxSb1−x and In1−xGaxSb samples even at room temperature show promising potential for IR photodetector applications.
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Hussain, L., Pettersson, H., Wang, Q. et al. SWIR-LWIR Photoluminescence from Sb-based Epilayers Grown on GaAs Substrates by using MBE. J. Korean Phys. Soc. 73, 1604–1611 (2018). https://doi.org/10.3938/jkps.73.1604
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DOI: https://doi.org/10.3938/jkps.73.1604