Direct Photopatterning of Electrochromic Polymers

Jacob Jensen, Aubrey L. Dyer, D. Eric Shen, Frederik C. Krebs, John R. Reynolds

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Propylenedioxythiophene (ProDOT) polymers are synthesized using an oxidative polymerization route that results in methacrylate substituted poly(ProDOTs) having a Mn of 10–20 kDa wherein the methacrylate functionality constitutes from 6 to 60% of the total monomer units. Solutions of these polymers show excellent film forming abilities, with thin films prepared using both spray‐casting and spin‐coating. These polymers are demonstrated to crosslink upon UV irradiation at 350 nm, in the presence of an appropriate photoinitiator, to render the films insoluble to common organic solvents. Electrochemical, spectroelectrochemical, and colorimetric analyses of the crosslinked polymer films are performed to establish that they retain the same electrochromic qualities as the parent polymers with no detriment to the observed properties. To demonstrate applicability for multi‐film processing and patterning, photolithographic patterning is shown, as is desired for fully solution processed and patterned devices.

Original languageEnglish
JournalAdvanced Functional Materials
Volume23
Issue number30
Pages (from-to)3728-3737
ISSN1616-301X
DOIs
Publication statusPublished - 2013

Keywords

  • Electrochromic polymers
  • Crosslinking
  • Patterning
  • Solution processable
  • Photopatterning

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