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• W2053924645 endingPage "14747" @default.
• W2053924645 startingPage "14739" @default.
• W2053924645 abstract "The intensity and the lifetime of quantum well (QW) photoluminescence (PL) both decrease at high temperatures. This is ascribed to thermal emission of charge carriers out of confined QW states into barrier states and subsequent nonradiative recombination processes. Corresponding activation enegies reported in several publications range from the total QW binding energy ensuremath{Delta}${mathit{E}}_{mathrm{tot}}$ of electrons and holes to half of ensuremath{Delta}${mathit{E}}_{mathrm{tot}}$, or to the binding energy of the shallower bound particle. In pursuit of this discrepancy, we perform steady-state and time-resolved PL measurements under high and low excitation conditions on a series of multiple QW structures of the material systems ${mathrm{In}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As/GaAs, GaAs/${mathrm{Al}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As, and ${mathrm{In}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As/InP. Covering an intensity range of more than three orders of magnitude, we find that in the high-temperature limit the final activation is associated with ensuremath{Delta}${mathit{E}}_{mathrm{tot}}$ for both high and low excitation. We discuss our findings in the frame of simple model for the density of states, thermalization, and recombination rates of electrons and holes." @default.
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• W2053924645 date "1995-11-15" @default.
• W2053924645 modified "2023-10-05" @default.
• W2053924645 title "Thermal carrier emission from a semiconductor quantum well" @default.
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• W2053924645 doi "https://doi.org/10.1103/physrevb.52.14739" @default.
• W2053924645 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9980811" @default.
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