一种量子点荧光复合材料及其制备方法和应用

本发明涉及一种量子点荧光复合材料及其制备方法和应用，所述量子点荧光复合材料包括：石墨烯，以及复合于石墨烯上的聚合物微球；聚合物微球的内部包埋有量子点；聚合物微球的表面与石墨烯的表面通过肽键键合。一方面改善量子点和聚合物材料的兼容性问题，控制量子点聚合物复合材料的形貌，避免了石墨烯直接和量子点结合容易猝灭的缺陷；另一方面发挥了石墨烯优异的阻隔水氧能力，减少水氧对量子点的侵蚀，同时石墨烯的优异热传导性能进一步提高量子点复合材料稳定性。复合结构稳定的量子点@PS微球@石墨烯复合材料封装成量子点LED，可以在不明显降低量子点的光学性能的情况下进一步提高LED的阻水阻氧稳定性。

The invention relates to a quantum dot fluorescent composite material as well as a preparation method and application thereof. The quantum dot fluorescent composite material is prepared from the following components: graphene and polymer microspheres compounded on the graphene, wherein quantum dots are embedded into the polymer microspheres; the surfaces of the polymer microspheres are bonded withthe surface of the graphene through peptide bonds. On one hand, the compatibility problem of the quantum dots and a polymer material is improved, the shape of the quantum dot polymer composite material is controlled, and the defect that the graphene is easy to quench when being directly combined with the quantum dots is avoided; on the other hand, an excellent water and oxygen blocking capabilityof the graphene is expressed and invasion, caused by water and oxygen, on the quantum dots is reduced; meanwhile, the stability of the quantum dot composite material is further improved by excellentheat conduction performance of the graphene. The quantum dot@PS microsphere@graphene composite material with a stable compound structure is packaged into a quantum dot LED (Light Emitting Diode), so that the water blocking and oxygen blocking stability of the LED can be further improved under the condition that the optical performance of the quantum dots is not remarkably reduced.