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• W2079375384 abstract "The effect of quantum confinement in PbSe quantum wells and dots is studied using tight binding calculations. Compared to zinc-blende semiconductors, unusual physical properties are predicted for rock salt PbSe nanostructures. The energy gap increases as the inverse of the size both for wells and dots. For PbSe nanocrystals, the luminescence lifetime, the confinement energy, and the intraband optical properties are in good agreement with experiments. The high quantum yield observed experimentally can be explained by the absence of surface dangling bonds in these systems. The origin of the second peak measured in the absorption spectra is discussed, whereas S-P interband transitions exhibit very small oscillator strength. The full frequency-dependent dielectric function $ϵ(ensuremath{omega})$ is calculated for PbSe quantum wells. Its imaginary part ${ϵ}_{2}(ensuremath{omega})$ is strongly anisotropic and shows large variations with respect to its bulk value even far from the gap region." @default.
• W2079375384 created "2016-06-24" @default.
• W2079375384 creator A5013507022 @default.
• W2079375384 creator A5029418897 @default.
• W2079375384 date "2004-12-27" @default.
• W2079375384 modified "2023-10-05" @default.
• W2079375384 title "Confinement effects in PbSe quantum wells and nanocrystals" @default.
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• W2079375384 doi "https://doi.org/10.1103/physrevb.70.245321" @default.
• W2079375384 hasPublicationYear "2004" @default.
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