Journal
EUROPEAN PHYSICAL JOURNAL B
Volume 74, Issue 3, Pages 313-317Publisher
SPRINGER
DOI: 10.1140/epjb/e2010-00092-7
Keywords
-
Categories
Funding
- National Natural Science Foundation of China
- Program for New Century Excellent Talents in University (NCET)
- Hebei Province Outstanding Youth Science Fund [A2009001512]
- Hebei Province Education Committee Foundation of China [2007124]
Ask authors/readers for more resources
Within an extended Su-Schrieffer-Heeger model including interchain interactions and the extended Hubbard model (EHM), the dynamical relaxation of photoexcitations in the presence of an external electric field is investigated using a nonadiabatic evolution method. Under the action of the interchain interactions both intrachain excitons and interchain excitons are generated after photoexcitation in two coupled polymer chains. Our results show that the field required to dissociate the excitons depends sensitively on the strength of the interchain coupling. As the interchain coupling strength increases, the dissociation field decreases. By analyzing the relation between the yield of intrachain and interchain excitons and the interchain coupling strength, we explain the dependence between the dissociation field and the strength of the interchain interactions. The theoretical results are expected to provide useful predictions concerning which polymers with properly strong interchain interactions are likely to be most suitable for use in organic solar cells.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available