Low-temperature blue light protective film and preparation method thereof

The invention relates to a low-temperature blue light protection film and a preparation method thereof, and the method comprises the following steps: adding a silicon source into a solvent to obtain a mixed solution; adding a catalyst into the mixed solution, and mixing to obtain a hydrolysis solution; adding a cross-linking agent into the hydrolysis solution, and mixing to obtain silicon dioxide precursor sol; adding a silver source into the silicon dioxide precursor sol, mixing and aging to obtain silver-doped silicon dioxide precursor sol; and coating the surface of a substrate with the silver-doped silicon dioxide precursor sol, and forming a low-temperature blue light protection film on the surface of the substrate after ultraviolet radiation, drying and annealing to obtain the blue light prevention diaphragm. Compared with the prior art, the blue-light-emitting film has the advantages that the stability is high, most harmful blue light can be effectively absorbed, most beneficial blue light in other wav