Solid color film, preparation method thereof, and display device

A method of preparing a solid color film, comprising the following steps:

• S10, reacting a carboxyl group-containing rhodamine dye with an amino adamantane to form a guest structure;
• S20, forming a host structure by using cucurbituril;
• S30, thoroughly stirring the guest structure and the host structure in a buffer to form a solid color material;
• and
• S40, uniformly dispersing the solid color material in a transparent resin, followed by baking to form the solid color film, and
• wherein the solid color material comprising a host structure formed of cucurbituril and a guest structure supported on the host structure, wherein the guest structure is formed by bonding a carboxyl group-containing rhodamine-based dye and an amino adamantane through a chemical bond, and the guest structure is bonded to the host structure through an amino cation group of the rhodamine-based dye of the guest structure, and a carbonyl group on the cucurbituril in the host structure to form a host-guest structure.