The influence of backbone fluorination on the dielectric constant of conjugated polythiophenes
File(s)
Published version
Author(s)
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.
Date Issued
2018-10-01
Date Acceptance
2017-09-27
Citation
Advanced Electronic Materials, 2018, 4 (10)
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.
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
Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
British Council (Turkey)
EPSRC
Grant Number
EP/J021199/1
EP/G037515/1
IL4 337323
EP/L016702/1
Subjects
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
Date Publish Online
2017-11-27