Journal of Chemical Physics, volume 82, issue 1, pages 552-559

Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties

R Rossetti 1
R. Hull 1
J. M. Gibson 1
L E Brus 1
1
 
AT&T Bell Laboratories, Murray HIll, New Jersey 07974
Publication typeJournal Article
Publication date1985-01-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.4
ISSN00219606, 10897690
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract

Very small ZnS and CdS crystallites are made and stabilized in aqueous and methanolic media without organic surfactants. Low temperature (−77 °C) synthesis in methanol produces the smallest crystallites, ≈30 Å diameter cubic CdS and <20 Å diameter cubic ZnS. The crystallites are characterized by transmission electron microscopy and in situ optical spectroscopy (λ≳200 nm). The crystallites are too small to exhibit bulk band gaps in their optical spectra. In the band gap region, the small crystallites show a higher energy absorption threshold with a resolved spectral feature (quantum size exciton peak), not present in the spectra of larger crystals. The far ultraviolet spectra are unaffected by size at present resolution. These results can be understood in terms of the crystallite molecular orbitals, and an elementary confined electron and hole model.

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Rossetti R. et al. Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties // Journal of Chemical Physics. 1985. Vol. 82. No. 1. pp. 552-559.
GOST all authors (up to 50) Copy
Rossetti R., Hull R., Gibson J. M., Brus L. E. Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties // Journal of Chemical Physics. 1985. Vol. 82. No. 1. pp. 552-559.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1063/1.448727
UR - https://doi.org/10.1063/1.448727
TI - Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties
T2 - Journal of Chemical Physics
AU - Rossetti, R
AU - Hull, R.
AU - Gibson, J. M.
AU - Brus, L E
PY - 1985
DA - 1985/01/01 00:00:00
PB - American Institute of Physics (AIP)
SP - 552-559
IS - 1
VL - 82
SN - 0021-9606
SN - 1089-7690
ER -
BibTex |
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BibTex Copy
@article{1985_Rossetti,
author = {R Rossetti and R. Hull and J. M. Gibson and L E Brus},
title = {Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties},
journal = {Journal of Chemical Physics},
year = {1985},
volume = {82},
publisher = {American Institute of Physics (AIP)},
month = {jan},
url = {https://doi.org/10.1063/1.448727},
number = {1},
pages = {552--559},
doi = {10.1063/1.448727}
}
MLA
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MLA Copy
Rossetti, R., et al. “Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties.” Journal of Chemical Physics, vol. 82, no. 1, Jan. 1985, pp. 552-559. https://doi.org/10.1063/1.448727.
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