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Scattering process between polaron and exciton in conjugated polymers
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics . Linköping University, The Institute of Technology.
Shandong University.
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics . Linköping University, The Institute of Technology.
Hebei Normal University.
2011 (English)In: JOURNAL OF CHEMICAL PHYSICS, ISSN 0021-9606, Vol. 134, no 4, 044906- p.Article in journal (Refereed) Published
Abstract [en]

Scattering process between a negative polaron and an exciton in a polymer chain is investigated by using the Su-Schrieffer-Heeger model modified to include electron-electron interactions, the Brazovskii-Kirova symmetry breaking term, and an external electric field. It is found that the scattering process is spin dependent. If the polaron and the exciton have parallel spins, the polaron can easily pass through the exciton as if it "do not see" the exciton. If the polaron and the exciton have antiparallel spins, there exist strong repulsion between them. The polaron may be bounced back, be dissociated or pass through the exciton depending on the strength of the external electric field. In any of these cases, the polaron cannot break the exciton.

Place, publisher, year, edition, pages
American Institute of Physics , 2011. Vol. 134, no 4, 044906- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-66289DOI: 10.1063/1.3548667ISI: 000286897600122OAI: oai:DiVA.org:liu-66289DiVA: diva2:403143
Note
Original Publication: Zhen Sun, Desheng Liu, Sven Stafström and Zhong An, Scattering process between polaron and exciton in conjugated polymers, 2011, JOURNAL OF CHEMICAL PHYSICS, (134), 4, 044906. http://dx.doi.org/10.1063/1.3548667 Copyright: American Institute of Physics http://www.aip.org/ Available from: 2011-03-11 Created: 2011-03-11 Last updated: 2011-03-30

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