The study of electronically conducting polymers with highly reversible p- & n-doping

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Abstract

Poly[3-(3,4,5)-trifluorophenyl]thiophene (PTFPT) and poly[(2,7-fluoren-9- one)-alt-(5,5'-(3,3'-di-n-octyl-2,2'bithiophene))] (PFDO BT-HH, HH=head-to-head) were used to compare the relative stability of their electrochemical p- and n-doping. Both polymers were expected to exhibit an optimized π-electron density in the polymeric backbone of polythiophene either by attaching a pendant (redox-inactive) electron-withdrawing group in the 3-position of the heterocyclic monomer, or by obtaining a co-monomer containing π-conjugated bithiophene and a redox-active subunit. It is shown that PTFPT is sensitive to over-reduction at high cathodic polarizations whereas PFDOBT-HH, in which n-doping occurs in two steps, is much more stable with respect to over-reduction. This is explained by the fact that bithiophene and fluoren-9-one subunits in PFDOBT-HH are conjugated, and hence, the injected negative charge is distributed on both subunits, thus stabilizing the doped polymeric structure. copyright The Electrochemical Society.

Original languageEnglish
Title of host publicationECS Transactions - Lithium-Ion Batteries
Subtitle of host publicationMaterials and Devices
PublisherElectrochemical Society Inc.
Pages259-263
Number of pages5
Edition27
ISBN (Print)9781604239072
DOIs
StatePublished - 2006
EventLithium-Ion Batteries: Materials and Devices - 210th ECS Meeting - Cancun, Mexico
Duration: 29 Oct 20063 Nov 2006

Publication series

NameECS Transactions
Number27
Volume3
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceLithium-Ion Batteries: Materials and Devices - 210th ECS Meeting
Country/TerritoryMexico
CityCancun
Period29/10/063/11/06

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