Bright, transparent, and light-emitting films using fluorescent QDs-polystyrene composite microspheres

摘要

In this paper, we have developed a simple method to prepare transparent composite fluorescent films by using poly(acrylic acid) co-polymer as a matrix and QDs-polystyrene fluorescent microspheres as light-emitting materials. The strategies include encapsulating fluorescent hydrophobic QDs into polystyrene microspheres with a miniemulsion polymerization process and fabricating composite fluorescent films with a coating method. The obtained light-emitting films were transparent under visible region and showed bright red, green, and blue lights under the irradiation of UV light. The PL intensity of the composite films shows linear increase when the concentration of QDs-polystyrene microspheres is increased within a certain range. Moreover, a white light-emitting film can be obtained by combination of red, green, and blue QDs-polystyrene microspheres with a correct proportion.