Synthetic Design of Dual Polar Side Chain Polymers for Enhancing Electrochromic Performance

This work reports the synergistic effect of dual polar
(triethylene
glycol and ester) side chains in enhancing the electrochromic devices
(ECDs) performance of conjugated polymers. By using dual polar side
chains instead of alkyl side chains, the cyclic stability of ECDs
(PFS-2) achieved an enhancement of more than 1600%, the coloring time
was shortened by 58%, coloration efficiency increased by 57%, and
the driving voltage was reduced by 25%. This synergistic effect is
attributed to the dual polar side chains, which help facilitate charge
transport and enhance ion diffusion rates, thereby creating favorable
conditions for ion movement. The concept of synergistic promotion
of ionic conductivity of conjugated polymers by dual polar side chains
has been proposed, paving new pathways for further enhancing the performance
of conjugated polymers. This research offers new perspectives on designing
materials for advanced ECDs and suggests ways to enhance conjugated
polymers for use in adaptive camouflage.