3,4-ethylenedioxythiophene (EDOT) based donor-acceptor-donor (DAD) type conjugated polymers generally have extraordinary electrochromic properties due to the excellent nature of the EDOT unit. This work investigates the electrochromic properties of such a system; EDOT-Carbazole-EDOT (ECE) based DAD type of conjugated polymer. Electrochemically synthesized homopolymer film (PECE) showed multichromic behavior with excellent optical properties such as 34 % of optical contrast, subsecond switching response (0.96 s at 478 nm), high coloration efficiency (519 cm²/C at 478 nm) and remarkable specific capacitance (3.04 F/cm²). Inserting more EDOT units into the polymer matrix of PECE via electrochemical synthesis altered the spectral and capacitive behaviors of the resulting copolymers. 2:1 (ECE:EDOT) feeded copolymer exhibited better electrochromic performance than equal feeded copolymer. On the other hand, the capacitive range and capacitance stability were significantly enhanced as the EDOT unit increased in the copolymer matrix.PECE and its copolymers were used to construct dual-type electrochromic devices with poly(3, 4-ethylenedioxythiophene) (PEDOT). ECDs of PECE and copolymers exhibited superior stability upon many switchings, with subsecond switching responses. Furthermore, ECDs can be switched effectively even at the scan rate of 500 mV/s without any loss in charge/discharge amounts. Finally, electrochromic supercapacitor device applications were performed, and a 1.5 V-LED was lighted for up to 25 seconds with the copolymer supercapacitor device.

中文翻译：

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EDOT 贡献对 EDOT-咔唑基电致变色聚合物电致变色和电容性能的影响：电致变色和超级电容器器件应用


由于 EDOT 单元的优异特性，基于 3,4-乙烯二氧噻吩 （EDOT） 的供体-受体-供体 （DAD） 型共轭聚合物通常具有非凡的电致变色性能。这项工作研究了这种系统的电致变色特性;基于 EDOT-咔唑-EDOT （ECE） 的 DAD 型共轭聚合物。电化学合成的均聚物薄膜 （PECE） 表现出多色行为，具有优异的光学特性，例如 34% 的光学对比度、亚秒级开关响应（478 nm 处为 0.96 s）、高着色效率（478 nm 处为 519 cm²/C）和显着的比电容 （3.04 F/cm²）。通过电化学合成将更多的 EDOT 单元插入 PECE 的聚合物基质中，改变了所得共聚物的光谱和电容行为。2：1 （ECE：EDOT） 进料共聚物表现出比同等进料共聚物更好的电致变色性能。另一方面，随着共聚物基体中 EDOT 单元的增加，电容范围和电容稳定性显着增强。PECE 及其共聚物用于用聚（3,4-乙烯二氧噻吩）（PEDOT）构建双型电致变色器件。PECE 和共聚物的 ECD 在多次切换时表现出优异的稳定性，具有亚秒级的切换响应。此外，即使在 500 mV/s 的扫描速率下，ECD 也可以有效切换，而不会损失任何充电/放电量。最后，执行了电致变色超级电容器器件的应用，并使用共聚物超级电容器器件点亮 1.5 V-LED 长达 25 秒。