Impact of ring torsion dynamics on intrachain charge transport in conjugated polymers
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, Vol. 79, no 1, 014302- p.Article in journal (Refereed) Published
Based on an approach including both the time-dependent Schrodinger equation and an effective Newtons equation for the ionic motion, we study the impact of ring torsion dynamics on the intrachain charge transport process in conjugated polymers. As model systems we have used single chains of poly(para-phenylene-vinylene). Without any external electric field, the dynamics of the phenyl ring torsion is the dominant property controlling intrachain charge propagation. The charge is coupled to both ring torsions and bond lengths distortions, which results in a significantly more localized polaron state than in a planar chain. In the presence of an electric field, the charge can breach the barriers caused by ring torsions, a process that involves nonadiabatic effects and a temporary delocalization of the polaron state.
Place, publisher, year, edition, pages
2009. Vol. 79, no 1, 014302- p.
conducting polymers, localised states, polarons, Schrodinger equation
IdentifiersURN: urn:nbn:se:liu:diva-16835DOI: 10.1103/PhysRevB.79.014302OAI: oai:DiVA.org:liu-16835DiVA: diva2:174378
Magnus Hultell and Sven Stafström, Impact of ring torsion dynamics on intrachain charge transport in conjugated polymers, 2009, PHYSICAL REVIEW B, (79), 1, 014302.
Copyright: American Physical Society