Four 1,4-bis((9H-carbazol-9-yl)methyl)benzene-containing polymers (PbCmB, P(bCmB-co-bTP), P(bCmB-co-dbBT), and P(bCmB-co-TF)) were electrosynthesized onto ITO transparent conductive glass and their spectral and electrochromic switching performances were characterized. The PbCmB film displayed four types of color variations (bright gray, dark gray, dark khaki, and dark olive green) from 0.0 to 1.2 V. P(bCmB-co-bTP) displayed a high transmittance variation (∆T = 39.56% at 685 nm) and a satisfactory coloration efficiency (η = 160.5 cm²∙C⁻¹ at 685 nm). Dual-layer organic electrochromic devices (ECDs) were built using four bCmB-containing polycarbazoles and poly(3,4-ethylenedioxythiophene) (PEDOT) as anodes and a cathode, respectively. PbCmB/PEDOT ECD displayed gainsboro, dark gray, and bright slate gray colors at −0.4 V, 1.0 V, and 2.0 V, respectively. The P(bCmB-co-bTP)/PEDOT ECD showed a high ∆T (40.7% at 635 nm) and a high coloration efficiency (η = 428.4 cm²∙C⁻¹ at 635 nm). The polycarbazole/PEDOT ECDs exhibited moderate open circuit memories and electrochemical redox stability. The characterized electrochromic properties depicted that the as-prepared polycarbazoles had a satisfactory application prospect as an electrode for the ECDs.

中文翻译：

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1,4-双((9H-Carbazol-9-yl)甲基)苯电致变色聚合物作为高对比度电致变色器件的潜在电极

四种含 1,4-双((9H-carbazol-9-yl)methyl) 苯的聚合物（PbCmB、P(bCmB- co -bTP)、P(bCmB- co -dbBT) 和 P(bCmB- co - TF)) 被电合成到 ITO 透明导电玻璃上，并表征了它们的光谱和电致变色开关性能。PbCmB 薄膜在 0.0 到 1.2 V 之间显示出四种颜色变化（亮灰色、深灰色、深卡其色和深橄榄绿色）。 P(bCmB- co -bTP) 显示出高透射率变化 (Δ T = 39.56% at 685 nm) 和令人满意的着色效率 ( η = 160.5 cm ² ∙C ^-1在 685 纳米）。双层有机电致变色器件 (ECD) 分别使用四种含 bCmB 的聚咔唑和聚 (3,4-乙烯二氧噻吩) (PEDOT) 作为阳极和阴极。PbCmB/PEDOT ECD 分别在 -0.4 V、1.0 V 和 2.0 V 下显示 Gainsboro、深灰色和明亮的石板灰色。P(bCmB- co -bTP)/PEDOT ECD 显示出高ΔT（在 635 nm 处为 40.7%）和高着色效率（在 635 nm 处η = 428.4 cm ² ∙C ^-1）。聚咔唑/PEDOT ECDs 表现出适度的开路记忆和电化学氧化还原稳定性。表征的电致变色性能表明所制备的聚咔唑作为ECDs的电极具有令人满意的应用前景。