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

Abstract

The MAPbBr3 perovskite was synthesized, and X-ray diffraction proves that the MAPbBr3 perovskite is a single crystal. MAPbBr3/polymethyl methacrylate (PMMA) organic glasses were fabricated. The MAPbBr3 single crystal shows strong UV–visible absorption and weak transmittance. Compared with the MAPbBr3 single 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.