Electrochromic polymer solution, electrochromic polymer thin film and electrochromic device and their manufacture

摘要

The present invention relates to an electrochromic device using a conductive polymer capable of controlling the degree of discoloration according to a voltage. The device of the present invention comprises a polyaniline N-alkylsulfonate having the following general formula (I) An electrochromic thin film,;- [BN (- R ₁ SO ₃ X)] _n - (I);In the above formula (I) B is _{R 2, R 3, R 4} , represents a benzene ring substituted by _{R 5, R 2, R 3} , R 4, R 5 are dogs both with one or two of them if the hydrogen R ₁ is - (CH ₂ ) _m - (wherein m is an integer of 2 to 12), X is hydrogen or a substituted or unsubstituted alkyl group having ₁ to 12 carbon atoms, (BNH ₃⁺ ) of an aniline derivative having the above-defined benzene ring (B), and n is a repeating unit. Examples of such an ammonium salt include sodium, lithium, potassium, ammonium, tetramethylammonium, tetraethylammonium or tetrabutylammonium, The electrochromic device has advantages such as easy processability of the electrochromic polymer thin film, high productivity, excellent oxidation stability, long color fading and excellent display characteristics.