ELECTROCHROMIC NANO FILM AND PREPARATION METHOD THEREOF AND ELECTROCHROMIC FILM ELEMENT CONTAINING THE SAME TO PROVIDE EXCELLENT ELECTROCHROMIC PROPERTIES AND CONVENIENT ADJUSTMENT OF THICKNESS

摘要

PURPOSE: An electrochromic nano film and preparation method thereof and an electrochromic film element containing the same are provided to improve electrochromic properties and the adjustment of a uniform film thickness, thereby exhibiting quick colorization/decolorization response and being advantageously applied to various fields such as a display, an electronic book, a portable computer and sunglass, etc. CONSTITUTION: The electrochromic film comprises at least one anionic compound selected from the conductive polymers substituted with alkyl sulfonates represented by formula 1, and at least one cationic compound selected from compounds represented by formula 2 layered on the substrate in alternate way. In formula 1, R1, R2, R3 and R4 are a hydrogen atom, a halogen atom, a methyl group, a methoxy group or a nitro group, provided that at least one of R1, R2, R3 and R4 is a hydrogen atom; R5 is an alkylene having the number of carbon atoms of 2-20, a polyethylene oxy group or alkylene-polyethylene oxy group; X is a hydrogen atom, an alkali metal ion or a tetraalkylammonium ion. In formula 2, Y- is a halogen ion, ClO4- and PF6-; R8 is an alkylene having the number of carbon atoms of 1-20 unsubstituted or substituted with halogen atoms, or -(CH2CH2O)n-, in which n is an integer of 1-20.