[en] We implement a simple, continuous, analytical model for exciton hopping in an energetically disordered molecular landscape. The model is parameterized against atomistic and lattice Monte Carlo simulations based on quantum-chemical calculations. It captures the essential physics of exciton diffusion in disordered media at different temperatures and yields a universal scaling law of the diffusion length with the dimensionless disorder parameter given by the ratio of the energetic disorder width to the thermal energy.
Disciplines :
Physics
Author, co-author :
Athanasopoulos, Stavros ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Emelianova, Evguenia ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Walker, A.B.
Beljonne, David ; Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux
Language :
English
Title :
Exciton Diffusion in Energetically Disordered Organic Materials
Publication date :
19 November 2009
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
Publisher :
American Physical Society, Moldova
Volume :
80
Issue :
19
Pages :
195209
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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