The influence of backbone fluorination on the dielectric constant of conjugated polythiophenes

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Title: The influence of backbone fluorination on the dielectric constant of conjugated polythiophenes
Authors: Boufflet, P
Bovo, G
Occhi, L
Fei, Z
Han, Y
Anthopoulos, T
Yuan, H
Heeney, MJ
Item Type: Journal Article
Abstract: The ability to modify or enhance the dielectric constant of semiconducting polymers can prove valuable for a range of optoelectronic and microelectronic applications. In the case of organic photovoltaics, increasing the dielectric constant of the active layer has often been suggested as a method to control charge generation, recombination dynamics, and ultimately, the power conversion efficiencies. In this contribution, the impact that the degree and pattern of fluorination has on the dielectric constant of poly(3-octylthiophene) (P3OT), a more soluble analogue of the widely studied conjugated material poly(3-hexylthiophene), is explored. P3OT and its backbone-fluorinated analogue, F-P3OT, are compared along with a block and alternating copolymer version of these materials. It is found that the dielectric constant of the polymer thin films increases as the degree of backbone fluorination increases, in a trend consistent with density functional theory calculations of the dipole moment.
Issue Date: 1-Oct-2018
Date of Acceptance: 27-Sep-2017
URI: http://hdl.handle.net/10044/1/55364
DOI: https://dx.doi.org/10.1002/aelm.201700375
ISSN: 2199-160X
Publisher: Wiley
Journal / Book Title: Advanced Electronic Materials
Volume: 4
Issue: 10
Copyright Statement: © 2017 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
British Council (Turkey)
EPSRC
Funder's Grant Number: EP/J021199/1
EP/G037515/1
IL4 337323
EP/L016702/1
Keywords: Science & Technology
Technology
Physical Sciences
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Science & Technology - Other Topics
Materials Science
Physics
block copolymers
conjugated polymers
dielectric constant
fluorination
OPEN-CIRCUIT VOLTAGE
ORGANIC SOLAR-CELLS
INSULATOR-SEMICONDUCTOR DIODES
BRANCHED PHTHALOCYANINE
SIDE-CHAINS
POLYMERS
THIOPHENE
POLY(3-HEXYLTHIOPHENE)
SELENOPHENE
MORPHOLOGY
Publication Status: Published
Article Number: 1700375
Online Publication Date: 2017-11-27
Appears in Collections:Physics
Chemistry
Experimental Solid State
Faculty of Natural Sciences



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