Formation of trans-Poly(thienylenevinylene) Thin Films by Solid-State Thermal Isomerization

Masayuki Wakioka, Natsumi Yamashita, Hiroki Mori, Richard Murdey, Takafumi Shimoaka, Nobutaka Shioya, Atsushi Wakamiya, Yasushi Nishihara, Takeshi Hasegawa, Fumiyuki Ozawa

Research output: Contribution to journalArticlepeer-review

Abstract

Cis-to-trans isomerization of poly(thienylenevinylene) is found to be a viable fabrication method for semiconducting trans-poly(thienylenevinylene) (trans-P1) thin films. Specifically, thin films of trans-P1, an alternating copolymer containing isoindigo and (E)-1,2-dithienylethene units, which are well known as an excellent p-type semiconductor, were prepared by thermally annealing thin films of the cis-poly(thienylenevinylene) (cis-P1) isomer (92% cis) at 240 °C for 30 min. The hole mobility of the isomerized films is comparable to that of films prepared from spin-coated solutions of the trans-isomer. Taking advantage of the greater solubility of the cis-isomer, it was possible to replace the toxic halogenated solvents normally needed for the dissolution of trans-P1 with the environmentally friendly 2-MeTHF. Solid-state cis-to-trans isomerization is therefore a potentially attractive fabrication option for the commercial development of sustainable, printable electronics.

Original languageEnglish
Pages (from-to)5631-5638
Number of pages8
JournalChemistry of Materials
Volume33
Issue number14
DOIs
Publication statusPublished - Jul 27 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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