The Influence of Backbone Fluorination on the Dielectric Constant of Conjugated Polythiophenes

Pierre Boufflet, Gianluca Bovo, Luca Occhi, Hua Kang Yuan, Zhuping Fei, Yang Han, Thomas D. Anthopoulos, Paul N. Stavrinou*, Martin Heeney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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.

Original languageEnglish (US)
Article number1700375
JournalAdvanced Electronic Materials
Volume4
Issue number10
DOIs
StatePublished - Oct 2018

Keywords

  • block copolymers
  • conjugated polymers
  • dielectric constant
  • fluorination

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'The Influence of Backbone Fluorination on the Dielectric Constant of Conjugated Polythiophenes'. Together they form a unique fingerprint.

Cite this