Layer-by-layer assembled triphenylene-based MOFs films for electrochromic electrode

Triphenylene-based metal-organic frameworks have shown broad research prospects in sensors, batteries, supercapacitors, catalysis and optoelectronics. However, a deficiency of controllable film-forming technology limits the further application of these MOFs. In this paper, Cu-3(HHTP)(2) MOF thin films with controllable thickness are prepared on the conductive glass surface with a layer-by-layer self-assembly method at room temperature. The results show that benefit from its porous structure, high electrochemical redox activity and low contact resistance with electrolyte, the Cu-3(HHTP)(2) films electrode show a fast coloring speed (about 3 s), good light modulation range (54% at 780 nm), and high coloring efficiency (632 cm(2) C-1). This work demonstrates the potential application of Cu-3(HHTP)(2) thin films in the electrochromic field.

Automated summary

This study explores the potential application of Cu-3(HHTP)(2) MOF thin films in the field of electrochromism. By utilizing a layer-by-layer self-assembly method, thin films with controllable thickness were prepared, demonstrating excellent electrochemical properties.