| abstract |
(57) [Summary] [Structure] In an electrochromic device comprising an electrolyte interposed between an electrochromic electrode and a counter electrode, the electrolyte is used in the pores of a polymer porous thin film having a refractive index of 1.48 to 1.56. , (A) 2,2-diphenylpropionitrile and (B) a solvent having a refractive index lower than that of the 2,2-diphenylpropionitrile (excluding polyether) as a solvent, and the ionic conductor An electrochromic device characterized by using an electrolyte thin film filled with. [Effect] The light transmittance can be improved by adjusting the refractive index with the polymer porous thin film, and the volatilization of the solvent can be prevented. It also has excellent characteristics as a C element. |