Hexyl-derivatized poly(3,4-ethylenedioxyselenophene): Novel highly stable organic electrochromic material with high contrast ratio, high coloration efficiency, and low-switching voltage

Mao Li, Asit Patra, Yana Sheynin, Michael Bendikov

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The use of novel polyselenophenes as electrochromic (EC) materials was investigated. The poly(3,4-ethylenedioxyselenophene) (PEDOS) films were electrodeposited onto indium-tin-oxide (ITO) coated glass having dimensions of 3.2 cm × 0.7 cm at a constant potential of 0.93 V versus Ag/AgCl and passing charge of 0.03 C to form a film with a thickness of ≈ 100 nm. PEDOS film obtained under these conditions has a band gap of ca. 1.42 eV. Introduction of alkyl chains onto the polymer backbone significantly improved the EC properties of PEDOT derivatives. The band gap of PEDOS-C6 was estimated to be 1.54 eV (805 nm), which is about 0.12 eV higher than for PEDOS. It was observed that polyselenophene derivatives exhibit excellent characteristics for EC applications.

Original languageEnglish
Pages (from-to)1707-1711
Number of pages5
JournalAdvanced Materials
Issue number17
Publication statusPublished - May 4 2009


ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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