▎ 摘　　要

NOVELTY - Graphene and quantum dot co-doped polymer dispersed liquid crystal comprises 1-2.5 pts. wt. graphene, 1-10 pts. wt. semiconductor quantum dots, 20-74 pts. wt. photosensitive polymer, 20-78 pts. wt. nematic liquid crystal and 1-5 pts. wt. photoinitiator. The semiconductor quantum dots are zinc cadmium selenide sulfur/zinc sulfide semiconductor quantum dots or cesium lead compound perovskite quantum dots. USE - The graphene and quantum dot co-doped polymer dispersed liquid crystal is useful in random laser (claimed). ADVANTAGE - The method has simple process, low production cost and short preparation period; and utilizes simple raw materials. The graphene and quantum dot co-doped polymer dispersed liquid crystal: has higher emission light intensity and low threshold value. DETAILED DESCRIPTION - Graphene and quantum dot co-doped polymer dispersed liquid crystal comprises 1-2.5 pts. wt. graphene, 1-10 pts. wt. semiconductor quantum dots, 20-74 pts. wt. photosensitive polymer, 20-78 pts. wt. nematic liquid crystal and 1-5 pts. wt. photoinitiator. The semiconductor quantum dots are zinc cadmium selenide sulfur/zinc sulfide (ZnCdSeS/ZnS) semiconductor quantum dots or cesium lead compound (CsPbX3) perovskite quantum dots. X = Cl, Br or I. An INDEPENDENT CLAIM is also included for preparing graphene and quantum dot co-doped polymer dispersed liquid crystal comprising (i) blending nematic liquid crystal, photosensitive polymer and semiconductor quantum dot under photoinitiator to obtain mixed solution, (ii) adding graphene into mixed solution, stirring to obtain solution A, the stirring process is protected from light, (iii) performing ultraviolet curing of solution A in the step (ii) and then separating the liquid crystal molecules to form liquid crystal droplets and then dispersing in the solution A.