Metal-like Charge Transport in PEDOT(OH) Films by Post-processing Side Chain Removal from a Soluble Precursor Polymer |
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| Authors: | James F. Ponder Jr. Shawn A. Gregory Amalie Atassi Abigail A. Advincula Joshua M. Rinehart Guillaume Freychet Gregory M. Su Shannon K. Yee John R. Reynolds |
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| Affiliation: | 1. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA;2. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA;3. NSLS-II, Brookhaven National Laboratory, Upton, New York, 11973 USA;4. Advanced Light Source & Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720 USA |
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| Abstract: | Herein, a route to produce highly electrically conductive doped hydroxymethyl functionalized poly(3,4-ethylenedioxythiophene) (PEDOT) films, termed PEDOT(OH) with metal-like charge transport properties using a fully solution processable precursor polymer is reported. This is achieved via an ester-functionalized PEDOT derivative [PEDOT(EHE)] that is soluble in a range of solvents with excellent film-forming ability. PEDOT(EHE) demonstrates moderate electrical conductivities of 20–60 S cm−1 and hopping-like (i.e., thermally activated) transport when doped with ferric tosylate (FeTos3). Upon basic hydrolysis of PEDOT(EHE) films, the electrically insulative side chains are cleaved and washed from the polymer film, leaving a densified film of PEDOT(OH). These films, when optimally doped, reach electrical conductivities of ≈1200 S cm−1 and demonstrate metal-like (i.e., thermally deactivated and band-like) transport properties and high stability at comparable doping levels. |
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| Keywords: | Charge Transport Conductive Polymers PEDOT Post-Polymerization Functionalization |
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