A 3,5-di(9H-carbazol-9-yl)benzonitrile (CzBN)-containing homopolymer (P(CzBN)) and five CzBN-containing 2,2′-bithiophene (BTP) copolymers, namely (P(CzBN-co-BTP)), P(CzBN-co-BTP2), P(CzBN-co-BTP3), P(CzBN-co-BTP4), and P(CzBN2-co-BTP), with various feeding molar ratios of CzBN and BTP were electrodeposited on transparent conductive indium tin oxide (ITO) electrodes, and their electrochromic performances were characterized. The P(CzBN-co-BTP4) film exhibited distinct electrochromic behaviors and displayed three different colors (brown, grayish-blue, and olive green) at different potentials. Electrochromic kinetic analyses of the anodic polymers revealed that P(CzBN-co-BTP) had a high transmittance change (ΔT%) (59.6% at 960 nm) and high coloration efficiency (η) (174.3 cm²/C at 960 nm) in three-electrode cells. Six dual-layer organic electrochromic devices (ECDs) were constructed using P(CzBN), P(CzBN-co-BTP), P(CzBN-co-BTP2), P(CzBN-co-BTP3), P(CzBN-co-BTP4), or P(CzBN2-co-BTP) as the anodically coloring layers and PEDOT as the cathodically coloring layer. The P(CzBN-co-BTP2)/PEDOT ECD had a high ΔT (43.7% at 627 nm) and a rapid response time (≤2.0 s), while the P(CzBN)/PEDOT ECD had a high η (616.7 cm²/C at 625 nm) and adequate optical memories. These electrochromic results suggest that cyano-containing polycarbazoles are promising high-contrast and rapid-response electrodes for ECD applications.

一种含3,5-二(9H-咔唑-9-基)苄腈(CzBN)的均聚物(P(CzBN))和五种含CzBN的2,2'-联噻吩(BTP)共聚物，即(P(CzBN- co -BTP))、P(CzBN- co -BTP2)、P(CzBN- co -BTP3)、P(CzBN- co -BTP4) 和 P(CzBN2- co -BTP)，具有不同的 CzBN 进料摩尔比将BTP和BTP电沉积在透明导电氧化铟锡（ITO）电极上，并对其电致变色性能进行表征。P(CzBN- co -BTP4) 薄膜表现出不同的电致变色行为，并在不同的电位下显示出三种不同的颜色（棕色、灰蓝色和橄榄绿色）。阳极聚合物的电致变色动力学分析表明，P(CzBN- co-BTP)在三电极电池中具有高透射率变化 (Δ T %) (59.6% at 960 nm) 和高着色效率 (η) (174.3 cm ^{2 /C at 960 nm)。}使用 P(CzBN)、P(CzBN- co -BTP)、P(CzBN- co -BTP2)、P(CzBN- co -BTP3)、 P(CzBN- co ) 构建了六个双层有机电致变色器件 (ECD ) -BTP4) 或 P(CzBN2- co -BTP) 作为阳极着色层，PEDOT 作为阴极着色层。P(CzBN- co -BTP2)/PEDOT ECD 具有高ΔT (627 nm 处为 43.7%) 和快速响应时间 (≤2.0 s)，而 P(CzBN)/PEDOT ECD 具有高η (616.7厘米²/C 在 625 nm）和足够的光学存储器。这些电致变色结果表明，含氰基聚咔唑是用于 ECD 应用的高对比度和快速响应电极。