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Particle-Size Distribution of CdSe Quantum Dots Determined by Photoluminescence Spectroscopy

Published online by Cambridge University Press:  21 February 2011

E.N. Prabhakar ,
C.A. Huber  and
D. Heiman
E.N. Prabhakar
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02139
C.A. Huber
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02139
D. Heiman
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02139
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Abstract

Particle-size distribution effects on the energy levels of semiconductor quantum dots are investigated. By examining the low temperature photoluminescence spectra of microcrystals of the binary semiconductor CdSe embedded in a glass matrix, the distribution of energy levels due to three-dimensional confinement is determined. Calculations of the electron-hole pair ground state energy provide a relation between confinement energy and particle diameter. This allows conversion of the photoluminescence lineshape directly into a distribution of particle radii and facilitates analysis of the observed properties of the material. With extension to other systems the technique can become a valuable tool in the study of semiconductor microparticle composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 164: Symposium H – Materials Issues in Microcrystalline Semiconductors , 1989 , 141
Copyright
Copyright © Materials Research Society 1990

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