Using the photocurable electrolyte solution containing viologen derivative 1,1′-bis- (4-vinylbenzyl)-4,4′-bipyridinium dihexafluorophosphate (EV 2+ •2PF 6 − ) and its composite of EV triphenylamine N,N′ -di(4-((3-(triethoxysilyl)-propyl)imino)methyl)phenyl- -diphenyl-4,4′-biphenyldiamine (TPB-PSSO) as electrochromic active layer, respectively, flexible devices (FECDs) were prepared by technolog...