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Synthesis and electrochromic properties of a carbazole and diketopyrrolopyrrole-based small molecule semiconductor

Journal of Industrial and Engineering Chemistry, ISSN: 1226-086X, Vol: 80, Page: 93-97
2019
  • 16
    Citations
  • 0
    Usage
  • 15
    Captures
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    Mentions
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Metrics Details

  • Citations
    16
    • Citation Indexes
      16
  • Captures
    15

Article Description

Carbazoles are excellent chromophores for electrochromic (EC) applications owing to their exceptional oxidation properties. Herein, we synthesized a donor-acceptor-type small molecule semiconductor, named LGC-D023, containing carbazole as a core donor, diketopyrrolopyrrole as a weak-acceptor π-linker, and 3-octylrhodanine as an electron-acceptor end-unit; and characterized its optical, thermal, and EC properties. LGC-D023 exhibited good organic solvent solubility, as well as distinct melting and crystallization transitions above 200 °C. Spectroelectrochemical spectra showed blue (L*: 88.28, a*: −6.56, b*: −1.29)-to-red (L*: 93.61, a*: 2.94, b*: −0.75) color switching with a high optical contrast (35.3%), fast response time (>0.3 s), and desirable coloration efficiency (91.9 cm 2 /C). These results confirmed that this donor-acceptor small molecule could be a new promising candidate for an EC material.

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