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...

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Veröffentlicht in:Journal of applied physics 2014-09, Vol.116 (12)
Hauptverfasser: Junliang, Xing, Yu, Zhang, Yongping, Liao, Juan, Wang, Wei, Xiang, Hongyue, Hao, Yingqiang, Xu, Zhichuan, Niu
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Sprache:eng
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Zusammenfassung: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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4896553