Applications of polymer coatings consisting of 9,9′-(4,4′-sulfonylbis(4,1-phenylene))biscarbazole and thiophene derivatives in electrochromic devices

Chung Wen Kuo, Shu Chien Fan, Jui Cheng Chang, Jeng Kuei Chang, Li Ting Lee, Pei Ying Lee, Tzi Yi Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A carbazole derivative (9,9′-(4,4′-sulfonylbis(4,1-phenylene))biscarbazole (SpDc)) was synthesized; subsequently, P(SpDc), P(SpDc-co-TP), P(SpDc-co-MTP), P(SpDc-co-PTP), and P(SpDc-co-HTP) films were electrochemically coated on ITO/glass substrates. Electrochromic characterizations show that the P(SpDc) film is pale ochre, dark khaki, moss green, and dark olive green at 0.0, 0.8, 1.0, and 1.1 V, respectively. The square wave potential step absorptiometry of the polymeric coatings shows that the P(SpDc-co-PTP) film exhibits a high transmittance change (ΔT = 52.8%) and a moderate coloration efficiency (η = 120.8 cm2 C−1). Furthermore, dual-layer electrochromic devices (ECDs) were fabricated using P(SpDc), P(SpDc-co-TP), P(SpDc-co-MTP), P(SpDc-co-PTP), and P(SpDc-co-HTP) as anodic coatings and PProDOT-Bz2 as the cathodic coating. P(SpDc-co-TP)/PProDOT-Bz2 ECD exhibited multicolored electrochromism, a high ΔT (50.9% at 635 nm), a high η (820.5 cm2 C−1 at 635 nm), and a fast switching time (less than 0.1 s). Given the adequate electrochromic performance of the organic coatings, it can be inferred that these coatings could be used in promising organic ECD applications.

Original languageEnglish
Article number107661
JournalProgress in Organic Coatings
Volume182
DOIs
StatePublished - Sep 2023

Keywords

  • Electrochromic electrode
  • Multicolor electrochromism
  • Organic coating
  • Organic electrochromic device
  • Transmittance change

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