Low angle dependence blue ZnS structural color film and preparation method thereof

Abstract

The present invention discloses a low angle dependence blue ZnS structural color film and a preparation method thereof, and belongs to the technical field of the preparation of the structural color material. The method is as follows: first, chemical homogeneous precipitation method is used to prepare uniform size ZnS microsphere nanoparticles, a film is produced on glass or ceramic substrate surface, and the film is calcined in a reducing atmosphere for protection, so that trace organics are carbonized to obtain the blue structural color film with uniform distributed carbon black. The method is simple, and highly repetitive, solves the technical problems that organic chemical paint is easy to fade and harmful to human body, meanwhile overcomes problems of high substrate requirements, harsh coating conditions and the like of opal structure photonic crystal, is suitable for construction of angle-dependent color-variable structural color pigments on surface of a variety of materials, and has broad application prospects. The prepared blue ZnS structural color film has uniform distributed carbon black, no angle dependence, good sphericity, and uniform particle size.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal material preparation, and in particular relates to a low-angle-dependent blue zinc sulfide structural color thin film and a preparation method thereof. Background technique [0002] Materials with high and low refractive indices are alternately arranged to form a periodic structure, that is, photonic crystals, through which light of a specific wavelength cannot pass through to generate photonic band gaps, thereby producing structural colors. Structural color is a kind of physical coloration, which has the advantages of bright color, never fading, environmental friendliness, and short preparation cycle. In recent years, through the ordered self-assembly method of colloidal microspheres, opal structure photonic crystals can be formed, and finally the light forms on the surface of photonic crystals with a periodic structure through dry radiation, diffraction, scattering, etc., resulting in c...

AI Technical Summary

Problems solved by technology

In recent years, through the ordered self-assembly method of colloidal microspheres, opal structure photonic crystals can be formed, and finally the light forms on the surface of photonic crystals with a periodic structure through dry radiation, diffraction, scattering, etc., resulting in colorful structural colors. , but because of the iridescent effect, that is, the colors observed in different directions are different, which greatly limits the application of structural color in wide viewing angle displays such as flat panel display, printing media, and optical equipment.

Some researchers have proposed that adding a small amount of black pigment can improve the color saturation, and can effectively reduce the dependence of the structural color on the angle, and achieve the effect that the structural color remains unchanged as the viewing angle changes (CN103173039A, 102702791A, 103788770A), but the above methods The disadvantage is that in the preparation of photonic crystal structural color film, it is necessary to mix the powder with a small amount of carbon black or black pigment to form a film. Small environmental fluctuations will have a great impact on the quality of the film, so it is difficult to be widely used

[0003] So far, there is no literature on the use of inorganic semiconductor oxides, sulfides and other materials to prepare such short-range ordered structural color thin films.

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