Nonlinear Optical and Optical Limiting Properties of MAPbBr₃/Polymethyl Methacrylate Organic Glasses

The MAPbBr₃perovskite was synthesized, and X-ray diffraction proves that the MAPbBr₃perovskite is a single crystal. MAPbBr₃/polymethyl methacrylate (PMMA) organic glasses were fabricated. The MAPbBr₃single crystal shows strong UV-visible absorption and weak transmittance. Compared with the MAPbBr₃single crystal, MAPbBr₃/PMMA organic glasses show suitable UV-visible absorption and transmittance and enhanced UV-visible absorption stability. The nonlinear optical measurement of MAPbBr₃/PMMA was performed. An obviously reverse saturable absorption is observed. The nonlinear absorption coefficient is as high as 3.8 m/GW. This large nonlinear absorption coefficient is competitive compared with that of perovskite materials. Besides, the nonlinear absorption stability of MAPbBr₃/PMMA is also studied. Both the UV-visible absorption and nonlinear absorption over time prove the excellent stability of MAPbBr₃/PMMA. The superior nonlinear refraction property of MAPbBr₃/PMMA is also performed. The excellent reverse saturable absorption property and the nonlinear refraction property of MAPbBr₃/PMMA result in superior optical limiting characteristics. This work implied that MAPbBr₃/PMMA may be applied for future optical limiting devices.