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The photoluminescence of epitaxial CdSe/ZnSe nanostructures with nominal CdSe coverage equal to 0.15 monolayer (ML) and 0.58ML was examined. Tightly localized quantum dot-like states occur in 0.58ML nanostructures. Ultra-fine 0.15ML heterostructures contain only weakly localized states with no distinct manifestation of strict quantum confinement. The increase of exciton concentration causes inelastic...
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