Electrochromic Devices Based on Poly(2,6-di(9H-carbazol-9-yl)pyridine)-Type Polymer Films and PEDOT-PSS

Chung-Wen Kuo; Bo-Wei Wu; Jeng-Kuei Chang; Jui-Cheng Chang; Li-Ting Lee; Tzi-Yi Wu; Tsung-Han Ho

doi:10.3390/polym10060604

Electrochromic Devices Based on Poly(2,6-di(9H-carbazol-9-yl)pyridine)-Type Polymer Films and PEDOT-PSS

Polymers (Basel). 2018 May 31;10(6):604. doi: 10.3390/polym10060604.

Authors

Chung-Wen Kuo¹, Bo-Wei Wu², Jeng-Kuei Chang³, Jui-Cheng Chang⁴, Li-Ting Lee⁵, Tzi-Yi Wu⁶, Tsung-Han Ho⁷

Affiliations

¹ Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan. welly@cc.kuas.edu.tw.
² Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan. 1104311140@gm.kuas.edu.tw.
³ Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan. jkchang@ncu.edu.tw.
⁴ Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan. d700215@gmail.com.
⁵ Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan. ltlee@fcu.edu.tw.
⁶ Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan. wuty@gemail.yuntech.edu.tw.
⁷ Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan. thho@cc.kuas.edu.tw.

Abstract

2,6-Di(9H-carbazol-9-yl)pyridine (DiCP) was synthesized and its corresponding homopolymer (PDiCP) and copolymers (P(DiCP-co-CPDT), P(DiCP-co-CPDT2), P(DiCP-co-CPDTK), and P(DiCP-co-CPDTK2)) were synthesized electrochemically. The anodic copolymer with DiCP:cyclopentadithiophene ketone (CPDTK) = 1:1 feed molar ratio showed high transmittance change (ΔT%) and colouration efficiency (η), which were measured as 39.5% and 184.1 cm² C^-1 at 1037 nm, respectively. Electrochromic devices (ECDs) were composed of PDiCP, P(DiCP-co-CPDT), P(DiCP-co-CPDT2), P(DiCP-co-CPDTK), and P(DiCP-co-CPDTK2) as anodically-colouring polymers, and poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) (PEDOT-PSS) as cathodically-colouring polymers. P(DiCP-co-CPDTK)/PEDOT-PSS ECD showed light silverish-yellow at 0.0 V, light grey at 0.7 V, grey at 1.3 V, light greyish blue at 1.7 V, and greyish blue at 2.0 V. Moreover, P(DiCP-co-CPDTK)/PEDOT-PSS ECD presented high ΔT (38.2%) and high η (633.8 cm² C^-1) at 635 nm.

Keywords: electrochemical polymerization; electrochromic polymer; optical contrast; poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid); spectroelectrochemistry.