Hydroxyl-rich cycloolefin copolymer long-afterglow material and application thereof

The invention discloses a cycloolefin copolymer long afterglow material rich in hydroxyl and application. A preparation method of the material comprises the following steps: adding an organic solvent, a phosphor and a cycloolefin copolymer matrix rich in a hydroxyl chamber into a reaction flask; the preparation method comprises the following steps: dissolving and uniformly mixing the raw materials, and keeping the constant temperature at 30-80 DEG C for 1-2 hours until the solvent is completely evaporated, so as to obtain the long afterglow material which is a blend of a cycloolefin copolymer matrix rich in hydroxyl and a phosphor. The material has excellent processability and can be used for preparing luminescent devices with complex shapes. The long-afterglow luminescent color is adjustable in the whole visible light range, stable long-afterglow emission is achieved in a water environment, an acid environment, an alkaline environment, a reducing environment, an oxidizing environment and a high temperature,