A highly stable, new electrochromic polymer: Poly(1,4-bis(2-(3(,)' 4 ' ethylenedioxy)thienyl)-2-methoxy-5-2 ''-ethylhexyloxybenzene)

作者：Sonmez G; Meng H; Zhang Q; Wudl F^*

来源：Advanced Functional Materials, 2003, 13(9): 726-731.

DOI：10.1002/adfm.200304317

A highly stable new electrochronic polymer, poly(1,4-bis(2-(3'-4'-ethylenedioxy)thienyl)-2-methoxy-5-2"-ethylhexloxybenzene) (R(BEDOT-MEHB)) was synthesized and its electrochemical and electrochromic properties are reported. P(BEDOT-MEHB) showed a very well defined electrochemistry with a relatively low oxidation potential of the monomer at +0.44 V versus Ag/Ag+, E-1/2 at -0.35 V versus Ag/Ag+ and stability to long-term switching up to 5000 cycles. A high level of stability to over oxidation has also been observed at this material shows that the absorbance of the pi-pi* transition in the neutral state is blue-shifted compared to REDOT, displaying a maximum at 538 nm (onset at 640 nm), thus giving an almost colorless highly transparent oxidized polymer with a bandgap of 1.95 eV. Different colors observed at different oxidation levels and strong absorption in the near IR make this polymer a good candidate for several applications.

• 出版日期2003-9