Silver nanowire film and manufacturing method therefore, and thuch screen panel and manufacturing method therefor

Abstract

(In Equation 1 above, [A] represents the number of silver nanowires A having an alignment degree of less than ±15° from the alignment direction, and [B] represents the number of silver nanowires B having an alignment degree of ±15° or more from the alignment direction.)

1 . A silver nanowire film comprising:
 silver nanowires A unidirectionally aligned in a longitudinal direction; and   silver nanowires B randomly aligned in the longitudinal direction,   wherein the silver nanowires A and the silver nanowires B each are plural and satisfy Equation 1 below:
   [ A ]/([ A ]+[ B ])>⅔  [Equation 1]
 
   (In Equation 1 above,   [A] represents the number of silver nanowires A having an alignment degree of less than ±15° from the alignment direction, and   B] represents the number of silver nanowires B having an alignment degree of ±15° or more from the alignment direction)   
     
     
         2 . The silver nanowire film of  claim 1 , wherein:
 the silver nanowire film   is a laminate form in which two or more layers are laminated.   
     
     
         3 . The silver nanowire film of  claim 1 , wherein:
 in adjacent layers in the silver nanowire film in which two or more layers are laminated,   alignment directions of the silver nanowires A are vertical to each other.   
     
     
         4 . The silver nanowire film of  claim 1 , wherein:
 an area of the silver nanowire film   is in the range of 1 cm 2  to 1000 cm 2 .   
     
     
         5 . The silver nanowire film of  claim 1 , wherein:
 light transmittance of the silver nanowire film   is 88.0% or more.   
     
     
         6 . The silver nanowire film of  claim 1 , wherein:
 sheet resistance of the silver nanowire film   is 45 Ωsq −1  or less (however, excluding 0 Ωsq −1 )   
     
     
         7 . The silver nanowire film of  claim 1 , wherein:
 the silver nanowire film   shows maximum light absorbance in a wavelength region of 360 nm to 364 nm during polarization irradiation.   
     
     
         8 . The silver nanowire film of  claim 7 , wherein:
 the silver nanowire film   has a full width at half maximum (FWHM) of 20 to 40.   
     
     
         9 . The silver nanowire film of  claim 7 , wherein:
 in the silver nanowire film,   as a polarization angle in the range of 0° to 90° increases, the maximum absorbance value increases.   
     
     
         10 . The silver nanowire film of  claim 7 , wherein:
 in the silver nanowire film,   as the polarization angle in the range of 0° to 90° increases, the absorbance value decreases in a wavelength region of more than 500 nm.   
     
     
         11 . A method for a silver nanowire film, comprising:
 locating a rod wound with metal in a coil shape to be spaced apart from one surface of the substrate;   distributing the dispersion containing silver nanowires and a solvent between the substrate and the rod;   moving the substrate and the rod relatively horizontally to coat a dispersion on one surface of the substrate; and   drying the dispersion to obtain the silver nanowire film on one surface of the substrate,   wherein in the moving of the substrate and the rod relatively horizontally to coat the dispersion on one surface of the substrate,   longitudinal directions of the silver nanowires in the dispersion are aligned in the horizontal movement direction.   
     
     
         12 . The method of  claim 11 , wherein:
 in the distributing of the dispersion containing silver nanowires and the solvent between the substrate and the rod,   a meniscus contact line is formed, in which the surface of the dispersion and the metal wound on the rod contact each other.   
     
     
         13 . The method of  claim 12 , wherein:
 in the moving of the substrate and the rod relatively horizontally to coat the dispersion on one surface of the substrate,   the meniscus contact line horizontally moves in the horizontal movement direction.   
     
     
         14 . The method of  claim 13 , wherein:
 longitudinal directions of the silver nanowires in the dispersion are aligned with the horizontal movement of the meniscus contact line.   
     
     
         15 . The method of  claim 11 , further comprising:
 after the drying of the dispersion to obtain the silver nanowire film on one surface of the substrate,   locating a rod wound with metal in a coil shape to be spaced apart from one surface of the silver nanowire film;   distributing the dispersion containing silver nanowires and a solvent between the silver nanowire film and the rod;   moving the silver nanowire film and the rod relatively horizontally to coat the dispersion on one surface of the silver nanowire film; and   drying the dispersion to obtain a laminate of the silver nanowire film.   
     
     
         16 . The method of  claim 15 , wherein:
 a relative movement direction in the moving of the substrate and the rod relatively horizontally to coat the dispersion on one surface of the substrate, and   a relative horizontal direction in the moving of the silver nanowire film and the rod relatively horizontally to coat the dispersion on one surface of the silver nanowire film   are vertical to each other.   
     
     
         17 . The method of  claim 11 , wherein:
 in the locating of the rod wound with the metal in the coil shape to be spaced apart from one surface of the substrate,   an interval between the substrate and the rod is   is in the range of 20 μm to 120 μm.   
     
     
         18 . The method of  claim 11 , further comprising:
 before the distributing of the dispersion containing silver nanowires and the solvent between the substrate and the rod,   locating a separator between the substrate and the rod.   
     
     
         19 . The method of  claim 11 , wherein:
 in the moving of the substrate and the rod relatively horizontally to coat the dispersion on one surface of the substrate,   the relative horizontal movement speed is   is in the range of 10 mm s −1  to 80 mm s −1 .   
     
     
         20 . The method of  claim 11 , wherein:
 in the moving of the substrate and the rod relatively horizontally to coat the dispersion on one surface of the substrate,   a temperature of the substrate   is in the range of 20° C. to 100° C.   
     
     
         21 . The method of  claim 11 , wherein:
 a coil interval of the metal wound on the rod   is in the range of 50 μm to 400 μm.   
     
     
         22 . The method of  claim 11 , wherein:
 viscosity of the dispersion   is in the range of 1 cP to 10 cP.   
     
     
         23 . The method of  claim 11 , wherein:
 the substrate   is made of glass, silicon, polyethylene terephthalate (PET), or a combination thereof.   
     
     
         24 . The method of  claim 11 , wherein:
 in the substrate,   a functional group, such as amine, methyl, hydroxyl, or a combination thereof, is present on the side where the silver nanowire film is located.   
     
     
         25 . A touch screen panel comprising:
 a location recognition layer including silver nanowires which are cross-aligned and recognizes a contact location through a voltage change; and   a strength recognition layer laminated on the top of the location recognition layer to contact the outside and including a composite molecule in which mechanochromic molecules and polydimethylsiloxane (PDMS) molecules are coupled to each other to recognize a contact strength through a change of a color.   
     
     
         26 . The touch screen panel of  claim 25 , wherein:
 the location recognition layer includes   a first laminate recognizing a contact location of a horizontal axis,   a spacer connected along a rim of an upper surface of the first laminate to provide a central region partitioned by the rim, and   a second laminate connected to the first laminate through the spacer and spaced apart from the central region and recognizing the contact location of a vertical axis.   
     
     
         27 . The touch screen panel of  claim 26 , wherein:
 a pair of horizontal electrodes are connected to the rim of the horizontal axis of the upper surface of the first laminate and a pair of vertical electrodes are connected to formed on the rim of a vertical axis of the lower surface of the second laminate, and   the spacer includes   a horizontal section located between the horizontal electrode and the second laminate, and   a vertical section located between the vertical electrode and the first laminate.   
     
     
         28 . The touch screen panel of  claim 27 , wherein:
 a height from the upper surface of the first laminate to the upper surface of the horizontal section is equal to the height from the lower surface of the second laminate to the lower surface of the vertical section.   
     
     
         29 . The touch screen panel of  claim 26 , wherein:
 the first laminate includes   a first film in which a plurality of silver nanowires is arranged in a direction corresponding to the horizontal axis, and   a second film laminated in the vertical direction with the first film, in which the plurality of silver nanowires is arranged in a direction corresponding to the vertical axis and intersects with the silver nanowires of the first film.   
     
     
         30 . The touch screen panel of  claim 29 , wherein:
 each of the plurality of silver nanowires has a longitudinal direction, and   the alignment degrees of the first film and the second film are defined by Equation 2 below and are ⅔ or more.
   Alignment degree=[ A ]/([ A ]+[ B ])  [Equation 2]
 
   ([A] represents the number of silver nanowires whose longitudinal direction and arrangement direction show a difference therebetween, which is within ±15° and [B] represents the number of silver nanowires whose the longitudinal direction and the arrangement direction show a difference therebetween, which is ±15° or more)   
     
     
         31 . The touch screen panel of  claim 25 , wherein:
 a mechanochromic molecule is composed of a spiropyran molecule, and   the strength recognition layer is composed of a spiropyran-PDMS complex molecule.   
     
     
         32 . The touch screen panel of  claim 25 , wherein:
 the strength recognition layer   has an increased magnitude of the normalized luminance as the contact strength increases.   
     
     
         33 - 38 . (canceled)