International Display Workshops General Incorporated Association

15:00 〜 15:20

[OLED3/PH3-2] Fabricating CsPbBr3@poly(methyl methacrylate) composite microspheres by direct thermal initiated polymerization

*Cai Yuting1, Rong-Jun Xie1 (1. Xiamen University(China))

perovskite quantum dots, stability, microspheres

https://doi.org/10.36463/idw.2020.0388

In this manuscript, we report a facile synthesis of water-resistant CsPbBr3 perovskite quantum dots (PQDs) loaded poly(methyl methacrylate) (PMMA) composite microspheres (CsPbBr3@PMMA). The method is based on the precipitation polymerization of methyl methacrylate (MMA) in the presence of CsPbBr3 PQDs. The CsPbBr3@PMMA microspheres show a tunable size and a narrow size distribution, with the CsPbBr3 PQDs being uniformly dispersed in the PMMA microspheres. The effective incorporation of PQDs is attributed to the strong coordination interactions between Pb ions on the surface of PQDs and carbonyl groups (C=O) from PMMA. Protected by the PMMA microspheres, the imbedded CsPbBr3 PQDs show improved water resistance and storage stability. Further, a wide-color-gamut (129%) white light-emitting diode (LED) was demonstrated by combining the green-emitting CsPbBr3@PMMA composite microspheres and red-emitting K2SiF6: Mn4+ with a blue LED, which enables to be used as backlights for liquid crystal displays.