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Title: Growth of GaAsBi/GaAs multiple quantum wells with up to 120 periods
Authors: Rockett, Thomas B.O.
Nada A. Adham
Faezah Harun
David, John P.R.
Richards, Robert D.
Keywords: A1.X-ray diffraction
A3.Molecular beam epitaxy
B1.Bismuth compounds
B2.Semiconducting III-V materials
B3.Solar cells
Issue Date: 30-May-2023
Abstract: In this work, we demonstrate the MBE growth of a systematic series of GaAsBi/GaAs multiple quantum well devices with up to 120 periods and report on their structural and optical characterisation. TEM images confirm the incorporation of a record number of wells for this material, while showing reasonable thickness uniformity. Fitting of the XRD data becomes worse as the number of quantum wells increases due to strain relaxation and out-of-plane growth inhomogeneity. The devices are compared to a previous series of devices grown in our group using PL and are found to have less severe strain relaxation due to the thicker barriers and lower average strain in the MQW stack, despite containing a greater number of wells.
Description: This article in indexed by Scopus
Appears in Collections:Conference Paper

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