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US 12,760,146 B2Granted
High transparency electrochromic polymers
AssigneeAmbilight Inc.
InventorsJianguo Mei, Vaidehi Pandit, Zhiyang Wang, Liyan You
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Abstract
An electrochromic polymer is comprised of a repeat unit comprising one or more meta-conjugated linkers (MCLs) and one or more aromatic moieties (Ars). Each of the one or more MCLs is partially conjugated with the one or more Ars at meta positions of the MCLs to form a polymer backbone of the electrochromic polymer. The electrochromic polymer undergoes an optical switching and a color change in an electrochromic device, which shows a high transparency and a high optical contrast.
Claims15
An electrochromic polymer, consisting of:
- a polymer backbone comprising one or more meta-conjugated linkers (MCLs) and one or more aromatic moieties (Ars),
- wherein each of the one or more MCLs is partially conjugated with the one or more Ars at meta positions of the one or more MCLs,
- wherein the electrochromic polymer has an energy bandgap equal to or higher than 2.9 eV and less than 4.0 eV in a neutral state.
Dependencies are inferred from the claim text.