Color modulation of electrochromic nanosheet-structured nickel–cobalt oxide thin films

Ultrafast black-color tunability of electrochromic dimming films using cobalt polyoxometalate-anchored nickel oxide nanoparticles

“…12 Nickel oxide with cobalt dopants also showed black-to-transparent electrochromism with an increase in optical contrast (58% at 700 nm) but the electrochromic switching times of the Co–NiO film were slower than those of the undoped NiO film. 13,14 Nevertheless, NiOx-based EC devices still suffer from low color contrast, slow responses, poor electrochemical stability, and low durability.…”