[en] A semiempirical quantum-chemical model based on a fragment orbital formalism is presented to assess molecular parameters relevant to charge transport in organic crystals. The mixed valence bond/Hartree-Fock approach provides an efficient integrated framework to evaluate the electronic polarization effects induced by localized charge carriers and the associated impact on the matrix elements mediating electron migration in the hopping regime. This formalism, applied here to anthracene clusters of increasing sizes and dimensionalities, yields the electrostatic and polarization contributions to the total interaction energy of the neutral and charged aggregates and leads to a reduction in the effective bandwidth by ~10%-20% as a result of the polarization cloud.
Disciplines :
Chemistry Physics
Author, co-author :
Castet, F.
Aurel, Ph.
Fritsch, A.
Ducasse, L.
Liotard, D.
Linares, M.
Cornil, Jérôme ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Beljonne, David ; Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Language :
English
Title :
Electronic Polarization Effects on Charge Carriers in Anthracene: A Valence Bond Study
Publication date :
24 March 2008
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
Publisher :
American Physical Society, Moldova
Volume :
77
Issue :
11
Pages :
115210, 1-14
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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