Dual polymer electrochromic sunglasses with black to anti-blue-ray conversion based on new anti-blue-ray transparent polymer

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-04, Vol.461, p.141848, Article 141848
• Main Authors: Fu, Haichang, Tang, Yixiao, Zhan, Feng, Zhang, Ling, Zhan, Wang, Dong, Yujie, Li, Weijun, Zhang, Cheng
• Format: Article
• Language: English
• Subjects: Anti-blue-ray and black electrochromic sunglass; Dual-polymers electrochromic devices; Electrochromic conjugated polymers
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2023.141848

[Display omitted] •Three solution-processable wide-bandgap conjugated polymers were synthesized.•Anti-blue-ray sunglasses device was fabricated based on new transparent polymer.•The prototype device exhibits the excellent electrochromic performances.•This work offers a viable strategy for anti-blue-ray electrochromic sunglasses. Smart electrochromic (EC) glasses with visible light modulation have attracted considerable attention due to their unique advantages, but EC sunglasses with anti-blue-ray function have not yet been reported. Herein, a series of wide-bandgap electrochromic conjugated polymers P2–P4 based on 3,4-propylenedioxythiophene (ProDOT) and naphthalene units were designed and synthesized using direct arylation polymerization. Among them, polymers P2 exhibit a satisfactory yellow hue and outstanding overall electrochromic performances. By tuning the intramolecular torsion between ProDOT and naphthalene units in the polymer structure, the absorption spectra of polymers P3 were entirely shifted to the high-energy violet-blue spectra region relative to the anti-blue-ray function. New dual conjugated polymer electrochromic devices based on P3 and black-to-transmissive electrochromic polymer were fabricated, which exhibited the fast transformation between black and anti-blue-ray transmissive color with a switching time of