Publication
Title
Exciton-phonon coupled states in $CdTe/Cd_{1-x}Zn_{x}Te$ quantum dots
Author
Abstract
 This article presents a theoretical analysis of the dependence of the exciton binding energy and exciton-LO-phonon coupling on the cylindrical quantum dot (QD) size. The effect of the temperature on the integrated photoluminescence line intensity is also investigated. Calculations were performed within the effective-mass approximation by using a variational method. Specific applications of these results are given for CdTe QDs embedded in a Cd1-xZnxTe matrix. The excitonic confinement is described by a finite, deep potential well. We observe, on the one-hand, an enhancement of the exciton binding energy and the exciton-LO-phonon coupling energy with decreasing dot size. On the other hand, at high temperature, the LO phonon has a noticeable effect on the photoluminescence intensity. This last physical parameter also shows a great dependence on QD size and on the potential level induced by the barrier material. (C) 2003 American Institute of Physics.
Language
English
Source (journal)
Journal of applied physics / American Institute of Physics. - New York, N.Y., 1937, currens
Publication
New York, N.Y. : American Institute of Physics, 2003
ISSN
0021-8979 [print]
1089-7550 [online]
Volume/pages
93:5(2003), p. 2906-2911
ISI
000181307000094
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Publication type Subject Affiliation Publications with a UAntwerp address