Otley Michael T, Alamer Fahad Alhashmi, Zhu Yumin, Singhaviranon Ashwin, Zhang Xiaozheng, Li Mengfang, Kumar Amrita, Sotzing Gregory A
Department of Chemistry, ‡Department of Physics, and §Polymer Program, University of Connecticut , 55 North Eagleville Road, Storrs, Connecticut 06269, United States.
ACS Appl Mater Interfaces. 2014 Feb 12;6(3):1734-9. doi: 10.1021/am404686w. Epub 2014 Jan 30.
We utilized our in situ method for the one-step assembly of single-layer electrochromic devices (ECDs) with a 3,4-propylenedioxythiophene (ProDOT) acrylate derivative, and long-term stability was achieved. By coupling the electroactive monomer to the cross-linkable polymer matrix, preparation of the electrochromic ProDOT polymer can occur followed by UV cross-linking. Thus, we achieve immobilization of the unreacted monomer, which prevents any degradative processes from occurring at the counter electrode. This approach eliminated spot formation in the device and increased stability to over 10 000 cycles when compared to 500 cycles with conventional ProDOT devices wherein the monomer is not immobilized. The acrylated electrochromic polymer exhibits similar electrochromic properties as conventional ProDOT devices, such as photopic contrast (48% compared to 46%) and switch speed (both 2 s). This method can be applied to any one-layer electrochromic system where improved stability is desired.
我们利用原位方法，通过3,4-亚丙基二氧噻吩（ProDOT）丙烯酸酯衍生物一步组装单层电致变色器件（ECD），并实现了长期稳定性。通过将电活性单体与可交联聚合物基质偶联，可以制备电致变色ProDOT聚合物，然后进行紫外交联。因此，我们实现了未反应单体的固定化，这防止了在对电极处发生任何降解过程。与传统的ProDOT器件（其中单体未固定化，循环次数为500次）相比，这种方法消除了器件中的斑点形成，并将稳定性提高到超过10000次循环。丙烯酸化电致变色聚合物表现出与传统ProDOT器件相似的电致变色特性，如明视觉对比度（分别为48%和46%）和切换速度（均为2秒）。该方法可应用于任何需要提高稳定性的单层电致变色系统。
