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Title: Ultraviolet-blue emission and electron-hole states in ZnSe quantum dots

Abstract

We observed the quantum-confined band edge emission from ZnSe quantum dots and the size dependence of the energy states, spin-orbit interaction, and Stokes shift. The band edge emission occurs in the ultraviolet blue. The energy gap=E{sub g}+C/d{sup n} where {ital d} is the diameter and {ital n} is 1.19{plus_minus}0.13 and 1.21{plus_minus}0.13 for the first and second electron-hole transitions, respectively. The separation between these transitions approaches the bulk spin-orbit splitting, while the Stokes shift decreases with particle size. Effective mass theories cannot explain these results. Trap emission is observed in some samples in the green and red, resulting from Se-related traps. {copyright} {ital 1999 American Institute of Physics.}

Authors:
 [1];  [2]; ;  [1]
  1. Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616 (United States)
  2. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)
Publication Date:
OSTI Identifier:
686428
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 75; Journal Issue: 12; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ZINC COMPOUNDS; PARTICLE SIZE; VISIBLE SPECTRA; ZINC SELENIDES; ELECTRON-HOLE COUPLING; PHOTOLUMINESCENCE; L-S COUPLING; ULTRAVIOLET SPECTRA; ENERGY GAP; SPECTRAL SHIFT; EFFECTIVE MASS

Citation Formats

Smith, C.A., Lee, H.W., Leppert, V.J., and Risbud, S.H. Ultraviolet-blue emission and electron-hole states in ZnSe quantum dots. United States: N. p., 1999. Web. doi:10.1063/1.124834.
Smith, C.A., Lee, H.W., Leppert, V.J., & Risbud, S.H. Ultraviolet-blue emission and electron-hole states in ZnSe quantum dots. United States. doi:10.1063/1.124834.
Smith, C.A., Lee, H.W., Leppert, V.J., and Risbud, S.H. Wed . "Ultraviolet-blue emission and electron-hole states in ZnSe quantum dots". United States. doi:10.1063/1.124834.
@article{osti_686428,
title = {Ultraviolet-blue emission and electron-hole states in ZnSe quantum dots},
author = {Smith, C.A. and Lee, H.W. and Leppert, V.J. and Risbud, S.H.},
abstractNote = {We observed the quantum-confined band edge emission from ZnSe quantum dots and the size dependence of the energy states, spin-orbit interaction, and Stokes shift. The band edge emission occurs in the ultraviolet blue. The energy gap=E{sub g}+C/d{sup n} where {ital d} is the diameter and {ital n} is 1.19{plus_minus}0.13 and 1.21{plus_minus}0.13 for the first and second electron-hole transitions, respectively. The separation between these transitions approaches the bulk spin-orbit splitting, while the Stokes shift decreases with particle size. Effective mass theories cannot explain these results. Trap emission is observed in some samples in the green and red, resulting from Se-related traps. {copyright} {ital 1999 American Institute of Physics.}},
doi = {10.1063/1.124834},
journal = {Applied Physics Letters},
number = 12,
volume = 75,
place = {United States},
year = {1999},
month = {9}
}