Particle-free silver ink, preparation method thereof and transparent silver conductive film and preparation method thereof

Abstract

The invention discloses particle-free silver ink, a preparation method of the particle-free silver ink, a transparent silver conductive film and a preparation method of the transparent silver conductive film, and belongs to the field of transparent conductive films. The particle-free silver ink comprises the following raw materials in percentage by mass: 10 to 23% of a silver precursor, 12 to 32% of a complexing agent, 41.5 to 70% of a solvent, and 0 to 10% of an additive; the preparation method of the particle-free silver ink comprises the following steps: uniformly mixing liquid raw materials; then adding solid raw materials, stirring until being completely dissolved, and filtering. The transparent silver conductive film comprises 99.9wt % of Ag and the balance of impurities, and is of a grid structure, and the film thickness is 30nm to 2 <mu> m, the film transmittance of the transparent silver conductive film is 17 to 83%, and the square resistance of the transparent silver conductive film is 1.1 to 11.3 omega / square; the preparation method of transparent silver conductive film comprises the following steps: printing or coating the particle-free silver ink on a transparent substrate, rising temperature to 100 to 400 DEG C and carrying out heat preservation for 3 to 45min. The method has simple operation, environmental protection, low curing temperature, low cost, easy storage and easy realization of industrialization, and further can be applied to a flexible substrate and can be realized by using multiple printing and coating methods.

Description

technical field [0001] The invention belongs to the field of transparent conductive films, in particular to a particle-free silver ink and a preparation method thereof, a transparent silver conductive film and a preparation method thereof. Background technique [0002] Transparent conductive film is a class of high conductivity (<10 -3 Ω cm), visible light range (λ = 380 ~ 780nm) has high light transmittance (T avg >80%), films with high reflectivity in the range of infrared light (>760nm), currently mainly include metal film system, oxide film system, etc. Transparency requires that the bandgap width of the material is greater than 3.1eV of the energy of visible light photons, and the concentration of free carriers is as small as possible; while conduction means that the free carrier concentration in the material is large enough, and the greater the free carrier concentration, the material The worse the light transmittance, so transparency and conductivity are th...

AI Technical Summary

Problems solved by technology

[0005] Whether it is coated with nano-silver wire or printed into an array of nano-silver particles by inkjet printing technology, it is a granular ink, and the method of preparing nano-silver wire and nano-silver particles is relatively cumbersome, and the shelf life of granular ink is short. Disadvantages such as easy settlement, high sintering temperature, clogged nozzle, etc.

Images