The Influence On The Electrochromic Performance Of Poly(1,4-bis(2-thienyl)-benzene)with The Introduction Of Micro-Nano Structure

Currently,electrochromic materials(EC)and device have realizedinitial applications in some fields,such as smart windows and viewing screen,which people have invested a lot of energy to rich the kinds of colors.But some shortages in key parameters,such as switching rate and contrast,has restricted its wider application.In order to improve this properties,n the work,highly ordered porous poly(1,4-bis(2-thienyl)-bertzene)(OP-PBTB)film with reversible color change was prepared via using monolayer amine-modified polystyrene(PAS)as template and electropolymerization method.SEM images and FT-IR spectra demonstrates the ordered porous nanostructure successfully obtained.The electrochemical and electrochromic measurement indicates OP-PBTB exhibits faster switching speed due to larger surface area and shorter ion diffusion distance.Moreover,the electrochemical impedance spectra was also carried out to provide reasonable explanation.In the second part of work,RGO/PBTB composite film are prepared via introducing the thin flake graphite,aiming at combining both their excellent performance.The measurement of UV-vis demonstrates that the OP-PBTB composite film exhibits shorter switching time and higher contrast.In conclusion,the introduction of micro-nano structure can improve the electrochromic performance and lay the foundation for its wider application.