Electrochromic polymer having pyrrole derivative and thiophene

An electrochromic polymer comprising a formula of

• [(Tr)a-(Ar1)b-(Ar2)c-(Ar3)d]n,
• wherein,
• Tr is a pyrrole-based or a pyrrole derivative-based trimer with a formula of
• Ar1 is
• Ar2 is
• Ar3 is
• n is an integer greater than 0;
• a is an integer greater than 0;
• b, c, and d are integers no less than 0, and a ratio between a and the sum of b, c, and d is between 0.1 to 4 inclusive;
• and each of R1-R13 is independently selected from, but not limited to, hydrogen, C1-C30alkyl, C2-C30alkenyl, C2-C30alkynyl, C2-C30alkylcarbonyl, C1-C30alkoxy, C3-C30alkoxyalkyl, C2-C30alkoxycarbonyl, C4-C30alkoxycarbonylalkyl, C1-C30alkylthio, C1-C30aminylcarbonyl, C4-C30aminylalkyl, C1-C30alkylaminyl, C1-C30alkylsulfonyl, C3-C30alkylsulfonylalkyl, C6-C18aryl, C3-C15cycloalkyl, C3-C30cycloalkylaminyl, C5-C30cycloalkylalkylaminyl, C5-C30cycloalkylalkyl, C5-C30cycloalkylalkyloxy, C1-C12heterocyclyl, C1-C12heterocyclyloxy, C3-C30heterocyclylalkyloxy, C1-C30heterocyclylalkyloxy, C1-C30heterocyclylaminyl, C5-C30heterocyclylalkylaminyl, C2-C12 heterocyclylcarbonyl, C3-C30heterocyclylalkyl, C1-C13heteroaryl, or C3-C30heteroarylalkyl.