SYNTHESIS OF VIOLOGEN-BASED MATERIALS FOR POLYMER ELECTROLYTE SYSTEMS IN ELECTROCHROMIC WINDOWS

Abstract

This study reported the synthesis of viologen via salt formation and anion exchange for polymer electrolyte
systems in electrochromic windows. The developed polymer electrolyte achieved 85–90 % visible
transparency and UV-blocking capability. The fabricated electrochromic window exhibited an average
transmittance modulation of ~65.7 % at 550 nm, transitioning from 74.96 % transmittance (0 V) to 9.29 %
(3 V). Initial testing of transmittance at 600 nm and current density over time demonstrated the
device’s durability and sustained performance, confirming its potential for practical applications in energy
efficient smart windows.