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Concentration effects on intrachain polaron recombination in conjugated polymers
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
University of Brasilia, Brazil.
University of Brasilia, Brazil.
University of Florida, FL 32611 USA.
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2015 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 17, no 2, 1299-1308 p.Article in journal (Refereed) Published
Abstract [en]

The influence of different charge carrier concentrations on the recombination dynamics between oppositely charged polarons is numerically investigated using a modified version of the Su-Schrieffer-Heeger (SSH) model that includes an external electric field and electron-electron interactions. Our findings show that the external electric field can play the role of avoiding the formation of excited states (polaron-exciton and neutral excitation) leading the system to a dimerized lattice. Interestingly, depending on a suitable balance between the polaron concentration and the electric field strength, the recombination mechanism can form stable polaron-excitons or neutral excitations. These results may provide guidance to improve the electroluminescence efficiency in Polymer Light Emitting Diodes.

Place, publisher, year, edition, pages
Royal Society of Chemistry , 2015. Vol. 17, no 2, 1299-1308 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-113492DOI: 10.1039/c4cp04514aISI: 000346236000067PubMedID: 25423278OAI: oai:DiVA.org:liu-113492DiVA: diva2:781957
Note

Funding Agencies|Swedish Research Council (VR); Swedish National Infrastructure for Computing (SNIC); Brazilian Research Council CNPq; Brazilian Research Council CAPES; Brazilian Research Council FINATEC

Available from: 2015-01-19 Created: 2015-01-19 Last updated: 2017-12-05

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Ribeiro, Luiz Antonio

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