A Novel Neutral State Green Polymeric Electrochromic with Superior n- and p-Doping Processes: Closer to Red-Blue-Green (RGB) Display Realization

• Published in: Advanced functional materials 2008-11, Vol.18 (22), p.3583-3589
• Main Authors: Cihaner, Atilla, Algı, Fatih
• Format: Article
• Language: English
• Subjects: benzoselenadiazole; conducting materials; electrochemistry; electrochromism; polymers
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.200801094

Two donor‐acceptor systems, 4,7‐di‐2‐thienyl‐2,1,3‐benzoselenadiazole (TSeT) and 4,7‐di‐2,3‐dihydrothieno[3,4‐b][1,4]dioxin‐5‐yl‐2,1,3‐benzoselenadiazole (ESeE) are synthesized and electropolymerized to give polymers PTSeT and PESeE, respectively. One of the polymers, PTSeT, is blue‐green in the neutral state and soluble, exhibiting a deep‐red emission color. The other, PESeE, is the first 2,1,3‐benzoselenadiazole‐based neutral state green polymer with a narrow bandgap (1.04 eV). Furthermore, PESeE has superior and durable n‐ and p‐doping processes. Beyond the stability and the robustness, both of the polymer films exhibit multi‐electrochromic behavior. Two donor‐acceptor systems bearing 2,1,3‐benzoselenadiazole units are synthesized and electropolymerized. One of the polymers is blue‐green in the neutral state and soluble, exhibiting a deep red emission color. The other is the first 2,1,3‐benzoselenadiazole‐based neutral state green polymer with three well defined absorption bands in its neutral state and superior and durable n‐ and p‐doping processes. Both of the polymer films also exhibit multi‐electrochromic behavior.