Three‐Dimensional Covalent Organic Framework Film for Fast and Ultrastable Near‐Infrared Electrochromism
Electrochromic (EC) covalent organic framework (COF) films provide ordered porous platforms for coupling redox‐active skeletons with ion transport, yet their long‐term operation is often limited by inefficient counterion compensation, sluggish electron transport, and redox‐induced structural instability. Herein, we rep...