Electrochromic materials (ECMs) have attracted increasing attentions on account of their extensive prospects and numerous demands. Here, the classical donor-acceptor (D-A) alternative copolymerization strategy was used to synthesize three kinds of novel conjugated polymers PBPS-1, PBPS-2, and PBPS-3. The diketopyrrolopyrrole (M1) unit with a long alkyl side-chain was employed as the core acceptor while the dithienosilole (M2) used as the donor units. More importantly, the benzodithiophene (M3) units which have the high skeleton coplanarity was selected as the bridge units to enhance the charge transport. Variations of the feed ratios of monomers was used to regulate the energy level and spectral absorption range of the solid films. Three polymers exhibited the abundant color hues in the redox process, which including grape purple/brownness/aircraft ash color (PBPS-1), dark grey/red soap/dusty blue color (PBPS-2) and marine blue/grayish/celadon color (PBPS-3). Electrochromic performances demonstrated that PBPS-2 possessed the fast discoloration speed as low as 0.26 s and the outstanding coloration efficiency (550.1 cm²·C⁻¹), which portended a valuable material for smart ECMs applications. Furthermore, the effect of different feed ratios for three polymer in electrochemical, optical and kinetic properties were investigated in detail, which showed the satisfactory optical contrasts (>70% in the NIR region) and good kinetic stability (>97% retention in 1000 s). In general, this exploration supplied a handy design strategy for fine tuning of polymer color and conducive to strengthen the understanding of EC behaviors of the ternary polymers, which deserve further researches to explore more promising ECMs.

电致变色材料（ECM）因其广阔的前景和众多的需求而受到越来越多的关注。这里，采用经典的供体-受体（DA）交替共聚策略合成了三种新型共轭聚合物PBPS-1、PBPS-2和PBPS-3。具有长烷基侧链的二酮吡咯并吡咯(M1)单元被用作核心受体，而二噻吩并噻咯(M2)用作供体单元。更重要的是，选择具有高骨架共面性的苯并二噻吩（M3）单元作为桥单元以增强电荷传输。单体进料比的变化用于调节固体膜的能级和光谱吸收范围。三种聚合物在氧化还原过程中表现出丰富的色调，包括葡萄紫/棕色/飞机灰色（PBPS-1）、深灰/皂红/灰蓝色（PBPS-2）和海蓝/灰/青瓷色(PBPS-3)。电致变色性能表明PBPS-2具有低至0.26 s的快速变色速度和出色的着色效率（550.1 cm²·C^-1），这预示着智能ECM应用的有价值的材料。此外，详细研究了三种聚合物不同投料比对电化学、光学和动力学性能的影响，结果显示出令人满意的光学对比度（近红外区域> 70％）和良好的动力学稳定性（1000秒内保留> 97％） ）。总的来说，这一探索为聚合物颜色的微调提供了一种方便的设计策略，有利于加强对三元聚合物EC行为的理解，值得进一步研究以探索更有前景的ECM。