Journal of Chemical Physics, volume 79, issue 11, pages 5566-5571

A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites

L E Brus 1
1
 
Bell Laboratories, Murray Hill, New Jersey 07974
Publication typeJournal Article
Publication date1983-12-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.4
ISSN00219606, 10897690
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract

Large semiconductor crystals have intrinsic electronic properties dependent upon the bulk band structure. As the crystal becomes small, a new regime is entered in which the electronic properties (excited states, ionization potential, electron affinity) should be strongly dependent upon the electron and hole in a confined space. We address the possibility of a shift in the photochemical redox potential of one carrier, as a function of crystallite size. As a semiquantitative guide, one might expect a shift on the order of h2/8em*R2 due to the kinetic energy of localization in the small crystallite. We model the elementary quantum mechanics of a charged crystallite using (a) the effective mass approximation, (b) an electrostatic potential for dielectric polarization, and (c) penetration of the carrier outside the crystallite in a cases of small effective mass. Shifts of several tenths of an eV appear possible in crystallites of diameter 50 Å. The carrier charge density reside near the crystallite surface if the effective mass is very small.

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Brus L. E. A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites // Journal of Chemical Physics. 1983. Vol. 79. No. 11. pp. 5566-5571.
GOST all authors (up to 50) Copy
Brus L. E. A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites // Journal of Chemical Physics. 1983. Vol. 79. No. 11. pp. 5566-5571.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1063/1.445676
UR - https://doi.org/10.1063/1.445676
TI - A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites
T2 - Journal of Chemical Physics
AU - Brus, L E
PY - 1983
DA - 1983/12/01 00:00:00
PB - American Institute of Physics (AIP)
SP - 5566-5571
IS - 11
VL - 79
SN - 0021-9606
SN - 1089-7690
ER -
BibTex |
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BibTex Copy
@article{1983_Brus,
author = {L E Brus},
title = {A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites},
journal = {Journal of Chemical Physics},
year = {1983},
volume = {79},
publisher = {American Institute of Physics (AIP)},
month = {dec},
url = {https://doi.org/10.1063/1.445676},
number = {11},
pages = {5566--5571},
doi = {10.1063/1.445676}
}
MLA
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MLA Copy
Brus, L. E.. “A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites.” Journal of Chemical Physics, vol. 79, no. 11, Dec. 1983, pp. 5566-5571. https://doi.org/10.1063/1.445676.
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