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Title: Investigation of interfaces in AlSb/InAs/Ga₀.₇₁In₀.₂₉Sb quantum wells by photoluminescence

We have investigated excitation power and temperature dependent PL spectra to systematically study the influences of the interfaces in the both InAs/Ga₀.₇₁In₀.₂₉Sb and InAs/AlSb on the optical properties of AlSb/Ga₀.₇₁In₀.₂₉Sb/InAs quantum wells (QWs). The localized states as well as the activation energy were analyzed to discuss the possible thermal quenching and non-radiative recombination mechanisms. We found two non-radiative recombination processes were involved in the thermal quenching of radiative emission for the QW structures. The GaAs-like interface in InAs/Ga₀.₇₁In₀.₂₉Sb with higher activation energy (62.7 meV) in high temperature region (70 K–300 K) supplies a deeper hole confinement and less roughness than the InSb-like one, which suppress non-radiative recombination process and promote the optical qualities of the quantum wells. The peak energy of the InSb-like sample exhibited “step-curve” behavior with increase temperature. Neither InSb-like nor AlAs-like interface in InAs/AlSb favored the radiative emission efficiency.
Authors:
; ; ; ; ; ; ;  [1] ;  [2]
  1. State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, 100083 Beijing (China)
  2. (China)
Publication Date:
OSTI Identifier:
22305689
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACTIVATION ENERGY; ALUMINIUM ARSENIDES; ALUMINIUM COMPOUNDS; ANTIMONIDES; CONFINEMENT; EFFICIENCY; EXCITATION; GALLIUM ANTIMONIDES; GALLIUM ARSENIDES; INDIUM ANTIMONIDES; INDIUM ARSENIDES; INTERFACES; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; QUANTUM WELLS; QUENCHING; RECOMBINATION; ROUGHNESS; SPECTRA; TEMPERATURE DEPENDENCE