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How many parameters actually affect the mobility of conjugated polymers?
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Fornari, Rocco P., Blom, Paul W. M. and Troisi, Alessandro (2017) How many parameters actually affect the mobility of conjugated polymers? Physical Review Letters, 118 . 086601. doi:10.1103/PhysRevLett.118.086601 ISSN 0031-9007.
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Official URL: https://doi.org/10.1103/PhysRevLett.118.086601
Abstract
We describe charge transport along a polymer chain with a generic theoretical model depending in principle on tens of parameters, reflecting the chemistry of the material. The charge carrier states are obtained from a model Hamiltonian that incorporates different types of disorder and electronic structure (e.g., the difference between homo- and copolymer). The hopping rate between these states is described with a general rate expression, which contains the rates most used in the literature as special cases. We demonstrate that the steady state charge mobility in the limit of low charge density and low field ultimately depends on only two parameters: an effective structural disorder and an effective electron-phonon coupling, weighted by the size of the monomer. The results support the experimental observation [N. I. Craciun, J. Wildeman, and P. W. M. Blom, Phys. Rev. Lett. 100, 056601 (2008)] that the mobility in a broad range of (polymeric) semiconductors follows a universal behavior, insensitive to the chemical detail.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | |||||||||
Library of Congress Subject Headings (LCSH): | Conjugated polymers, Electron mobility, Charge transfer, Hamiltonian systems | |||||||||
Journal or Publication Title: | Physical Review Letters | |||||||||
Publisher: | American Physical Society | |||||||||
ISSN: | 0031-9007 | |||||||||
Official Date: | 24 February 2017 | |||||||||
Dates: |
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Volume: | 118 | |||||||||
Article Number: | 086601 | |||||||||
DOI: | 10.1103/PhysRevLett.118.086601 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Copyright Holders: | American Physical Society | |||||||||
Date of first compliant deposit: | 8 February 2018 | |||||||||
Date of first compliant Open Access: | 9 February 2018 | |||||||||
RIOXX Funder/Project Grant: |
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