Silver nanowire transparent conductive thin film and preparation method thereof
A technology of transparent conductive film and silver nanowires, which is applied in the manufacture of cables/conductors, conductive layers on insulating carriers, conductive materials dispersed in non-conductive inorganic materials, etc. Over-rate, increase square resistance and other issues, to achieve the effect of reducing square resistance, tight contact, and large contact area
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[0026] The embodiment of the present invention also provides a method for preparing the aforementioned silver nanowire transparent conductive film, which includes the following steps:
[0027] Ultrasonic cleaning of flexible substrates;
[0028] Dispersing silver nanowires in a solvent to form a silver nanowire dispersion, uniformly coating the silver nanowire dispersion on a flexible substrate, and drying to obtain a silver nanowire conductive layer;
[0029] The obtained silver nanowire conductive layer is subjected to hot pressing treatment, so that the nano silver wires are plastically deformed and welded to obtain a flat connected silver nanowire transparent conductive film.
[0030] In the preparation method of the silver nanowire transparent conductive film provided by the embodiment of the present invention, the conductive layer of the silver nanowire is mechanically embedded on the surface of the flexible substrate by a hot pressing method, so that the silver nanowire in the cond
Example Embodiment
[0040] Example 1
[0041] Select polyethylene terephthalate as the flexible substrate, and dry it after hydrophilic treatment; disperse the silver nanowires evenly in the ethanol solution and configure to obtain a silver nanowire solution with a concentration of 0.5g / L; Spread the silver nanowire solution uniformly on the flexible substrate by spin coating at a spin coating speed of 3500r / min and dry for 30 seconds to obtain a conductive layer of silver nanowires; place the spin-coated flexible substrate on a heating plate. Hot press treatment, heating plate temperature 100℃, applied pressure 1.5bar, time 10s. The light transmittance of the silver transparent conductive film after the hot pressing treatment is 86.5%, the square resistance is 47.6Ω / square, and the haze is 7.2.
Example Embodiment
[0042] Example 2
[0043] Select polyethylene terephthalate as the flexible substrate, and dry it after hydrophilic treatment; disperse the silver nanowires evenly in the ethanol solution, and configure to obtain a silver nanowire solution with a concentration of 1.0g / L; Spread the silver nanowire solution uniformly on the flexible substrate by spin coating at a spin coating speed of 3500r / min and dry for 30 seconds to obtain a conductive layer of silver nanowires; place the spin-coated flexible substrate on a heating plate. Hot pressing treatment, heating plate temperature 120℃, applied pressure 2.0bar, time 10s. The light transmittance of the silver transparent conductive film after the hot pressing treatment is 85.7%, the square resistance is 41.8Ω / square, and the haze is 10.3.
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