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Quantum Confinement Effects on 100–400 Å Diameter Silver Bromide Microcrystals

Published online by Cambridge University Press:  28 February 2011

Michal Ilana Freedhoff ,
George McLendon  and
Alfred Marchetti
Michal Ilana Freedhoff
Affiliation:
University of Rochester, Rochester, NY, 14627
George McLendon
Affiliation:
University of Rochester, Rochester, NY, 14627
Alfred Marchetti
Affiliation:
Eastman-Kodak Company, Rochester, NY, 14652-4708
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Abstract

Previous work on quantum confined AgBr microcrystals has been limited to either large (500-1000 Å diameter) aqueous samples or extremely small (60-100 Å diameter) inhomogeneously sized micellar samples. This has prevented an investigation of the effect of size restriction on the phonon assisted transitions of the indirect exciton. A non-aqueous preparation was developed, capable of providing more homogeneous size distributions of AgBr microcrystals in the 100-400 Å diameter range. Low temperature luminescence studies were performed to determine the changes in energy and intensity associated with these excitonic transitions. The radiative lifetimes of some of the excitonic processes were measured in order to obtain a more global perspective on the photophysics of AgBr.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 358: Symposium F – Microcrystalline and Nanocrystalline Semiconductors , 1994 , 301
Copyright
Copyright © Materials Research Society 1995

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References

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