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This communication presents the photoluminescence spectra of molecular beam epitaxially grown GaAs structures made from a 500 nm thick layer of intrinsic conductivity capped with a silicon doped layer with a film thickness ranging from 10 to 100 nm. Two different doping concentrations of the cap layer, N_{Si} = 10^{17} cm^{-3} and N_{Si} = 10^{18} cm^{-3}, was considered. The results showed the excitonic...
A study of the photoluminescence properties of AlInN/GaN in comparison with the spectrum of the GaN active layer of the same heterostructure is presented. The strong intensity lines of the observed photoluminescence spectra are associated with the formation, enhancement and narrowing of the excitonic lines in the flat band region of the active GaN layer. The phenomena in the presence of electric field...
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