Physical Review B, volume 70, issue 24, publication number 245321

Confinement effects in PbSe quantum wells and nanocrystals

G ALLAN 1
C. Delerue 1
Jing Li 1
1
 
Institut d’Electronique, de Microélectronique et de Nanotechnologie (UMR CNRS 8520), Département ISEN, 41 Boulevard Vauban, F-59046 Lille Cedex, France
Publication typeJournal Article
Publication date2004-12-27
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
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.

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ALLAN G., Delerue C., Li J. Confinement effects in PbSe quantum wells and nanocrystals // Physical Review B. 2004. Vol. 70. No. 24. 245321
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ALLAN G., Delerue C., Li J. Confinement effects in PbSe quantum wells and nanocrystals // Physical Review B. 2004. Vol. 70. No. 24. 245321
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RIS Copy
TY - JOUR
DO - 10.1103/physrevb.70.245321
UR - https://doi.org/10.1103/physrevb.70.245321
TI - Confinement effects in PbSe quantum wells and nanocrystals
T2 - Physical Review B
AU - ALLAN, G
AU - Delerue, C.
AU - Li, Jing
PY - 2004
DA - 2004/12/27 00:00:00
PB - American Physical Society (APS)
IS - 24
VL - 70
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
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BibTex Copy
@article{2004_ALLAN,
author = {G ALLAN and C. Delerue and Jing Li},
title = {Confinement effects in PbSe quantum wells and nanocrystals},
journal = {Physical Review B},
year = {2004},
volume = {70},
publisher = {American Physical Society (APS)},
month = {dec},
url = {https://doi.org/10.1103/physrevb.70.245321},
number = {24},
doi = {10.1103/physrevb.70.245321}
}
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