Electron. Mater., Volume 1, Issue 1 (December 2020) – 5 articles
Cover Story (view full-size image): The thermal polymerisation of a bis(triphenylamine)-bis(styrene) monomer yielded an electroactive layer that underwent two stepwise oxidations. The perceived color of the film changed from colorless to yellow, followed by yellow to blue with applied potential. The immobilized film on ITO glass could reversibly switch between its colorless and blue states with applied potential upwards of 6 hours. The retention of the electrochemically induced blue color was contingent on the device architecture. More than 80% of the oxidized state’s color was maintained 30 min after the potential was turned off in a double-layer electrochromic device that was prepared from bis(triphenylamine) and viologen-based polymers. In contrast, 50% of the color of a single electroactive layer device layer bleached 7 min after the application of the potential was terminated. View this paper
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