Size-dependence of the exciton transitions ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Size-dependence of the exciton transitions in colloidal CdTe quantum dots
Author(s) :
Groeneveld, Esther [Auteur]
Universiteit Utrecht / Utrecht University [Utrecht]
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Service de Physique des Matériaux et Microstructures [SP2M - UMR 9002]
Donega, Celso de Mello [Auteur]
Universiteit Utrecht / Utrecht University [Utrecht]
Universiteit Utrecht / Utrecht University [Utrecht]
Delerue, Christophe [Auteur]
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Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Service de Physique des Matériaux et Microstructures [SP2M - UMR 9002]
Donega, Celso de Mello [Auteur]
Universiteit Utrecht / Utrecht University [Utrecht]
Journal title :
Journal of Physical Chemistry C
Pages :
23160-23167
Publisher :
American Chemical Society
Publication date :
2012
ISSN :
1932-7447
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
In this paper, we present a detailed investigation of the size dependence of the optical transitions of colloidal CdTe QDs ranging in diameter from 2.9 to 14.8 nm. The energy integrated absorption cross section per CdTe ...
Show more >In this paper, we present a detailed investigation of the size dependence of the optical transitions of colloidal CdTe QDs ranging in diameter from 2.9 to 14.8 nm. The energy integrated absorption cross section per CdTe unit is investigated in detail for the lowest two exciton transitions (1S3/2(h)–1S(e) and 2S3/2(h)–1S(e)) and shown to increase with decreasing size, although the size dependence of the 2S3/2(h)–1S(e) is less pronounced. The experimental absorption spectra are compared to spectra calculated by using a tight-binding approach. The calculations were carried out with electron–hole configuration interaction (CI) and without (single-particle, SP). The optical absorption spectra calculated by using the CI approach are in excellent agreement with the experiment, as well as the evolution of the optical gap and the optical transitions with nanocrystal size.Show less >
Show more >In this paper, we present a detailed investigation of the size dependence of the optical transitions of colloidal CdTe QDs ranging in diameter from 2.9 to 14.8 nm. The energy integrated absorption cross section per CdTe unit is investigated in detail for the lowest two exciton transitions (1S3/2(h)–1S(e) and 2S3/2(h)–1S(e)) and shown to increase with decreasing size, although the size dependence of the 2S3/2(h)–1S(e) is less pronounced. The experimental absorption spectra are compared to spectra calculated by using a tight-binding approach. The calculations were carried out with electron–hole configuration interaction (CI) and without (single-particle, SP). The optical absorption spectra calculated by using the CI approach are in excellent agreement with the experiment, as well as the evolution of the optical gap and the optical transitions with nanocrystal size.Show less >
Language :
Anglais
Popular science :
Non
Source :