Enhanced electrochromic performances of Polythieno[3, 2-b]thiophene with multicolor conversion via embedding EDOT segment. (20th December 2018)

• Record Type: Journal Article
• Authors: Xue, Yu; Xue, Zexu; Zhang, Wenwen; Zhang, Wenna; Chen, Shuai; Lin, Kaiwen; Xu, Jingkun
• Is Part Of: Polymer. Volume 159(2018)
• Page Start: 150
• Page End: 156
• Publication Date: 2018-12-20
• Subjects: Conjugated polymers -- Polythieno[3, 2-b]thiophene -- Electrochromism; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2018.11.018
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: A heterocyclic oligomer, thieno[3, 2-b]thiophene (TT) end-capped famous 3, 4-ethylenedioxythiophene (EDOT) unit and their electrosynthesized polymer P(TT-EDOT-TT) have been facilely achieved. To in-depth understand the effects of structural modification on physico-chemical properties and electrochromic performances of monomers and/or polymers, the absorption spectroscopy, electrochemistry, micromorphology, and spectroelectrochemistry were systematically studied. In contrast to TT and EDOT, TT-EDOT-TT possessed extended π-conjugation and narrowed band gap in molecular level. Through carefully comparison with PTT, it has been found that the electrochromic performances of P(TT-EDOT-TT) film exhibited much higher optical contrast (69%, while 3% for PTT in the near-infrared region) and superior coloring efficiency (255.3 cm 2 C −1, while 36.8 cm 2 C −1 for PTT), and switching times (within 1 s, while more than 9 s for PTT). Notably, P(TT-EDOT-TT) film can achieve the mutual conversion between RGB primary colors (red–green–blue) under variable voltages, which hold quite promising for display applications. Graphical abstract: Highlights: Facilely preparation method. Excellent electrochromic performances. Multicolor conversion between RGB color space.