PREPARATION METHOD OF THIN SILVER NANOWIRES USING IONIC LIQUIDS AND PRODUCTION METHOD OF TRANSPARENT ELECTRODE FILM USING THIS

摘要

The present invention relates to a method of preparing silver nanowires having an ultrafine structure, and more specifically, to a method of preparing silver nanowires capable of inhibiting a growth in the thickness direction to achieve an improved aspect ratio and narrow diameter distribution by using an ionic liquid as a soft template. More particularly, the method comprises the steps of: dissolving, in a solvent, a capping agent and an ionic liquid comprised of a quaternary ammonium salt to prepare a mixture solution; adding silver halide to the mixture solution to prepare silver seed particles having a diameter of equal to or less than 50 nm; and heating the mixture solution including silver seeds to grow the silver seeds into ultrafine silver nanowires having a diameter of equal to or less than 40 nm. According to the present invention, a two-dimensional film is produced with a silver nanowire-one-dimensional polymer conductor hybrid film which is produced by distributing or hybridizing the prepared ultrafine silver nanowires having a diameter of equal to or less than 40 nm with an one-dimensional polymer conductor, so as to produce a transparent conductive film. The transparent conductive film produced according to the present invention has high optical characteristics and electrical characteristics, and can be used as a transparent electrode material in various fields such as a flexible display, organic electronic material, solar cell, organic semiconductor, and the like.