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- W2034361236 abstract "Abstract We have developed a method which allows us to measure calibrated electroluminescence (EL) spectra from quantum well (QW) structures at moderate forward biases. This method has been successfully applied for the first time to asymmetric double QW (DQW) p-i-n diodes in the AlGaAs/GaAs system at temperatures between 200 and 295 K. We have measured the EL signal from both QW and a theoretical model has been used to extract the quasi-Fermi level separation (ΔφF) in the QWs and thus the n·p product of the excess electron and hole pairs. We have made several significant observations: (1) both ΔφF decrease relative to the applied bias (Vapp) with increasing temperature. (2) ΔφF is not the same in both wells in contradiction with the assumption of the detailed balance theory. (3) At lower temperatures the quantum well ΔφF show a dependence on the separation between the two QWs." @default.
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- W2034361236 date "2000-05-01" @default.
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- W2034361236 title "Temperature-dependent study of the quasi-Fermi level separation in double quantum well P-I-N structures" @default.
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- W2034361236 doi "https://doi.org/10.1016/s0167-9317(99)00490-6" @default.
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