Phys.org   October 19, 2023 Researchers in China have proposed a new trilayer film structure for self-powered flexible multicolor EC displays based on self-charging/discharging mechanism. It was assembled by sandwiching an ionic gel film between 2 cathodic nickel hexacyanoferrate (NiHCF) and Prussian blue (PB) nanoparticle films on indium tin oxide substrates, had self-powered color switching films with fast responsive time and high reversibility. Multicolor switching was achieved through a color overlay effect by superimposing the 2 EC films, including green, blue, yellow, and colorless. The patterns could be created by the spray-coating method… read more. Open Access TECHNICAL ARTICLE