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

Abstract

The MAPbBr 3 perovskite was synthesized, and X-ray diffraction proves that the MAPbBr 3 perovskite is a single crystal. MAPbBr 3 /polymethyl methacrylate (PMMA) organic glasses were fabricated. The MAPbBr 3 single crystal shows strong UV−visible absorption and weak transmittance. Compared with the MAPbBr 3 single crystal, MAPbBr 3 / PMMA organic glasses show suitable UV−visible absorption and transmittance and enhanced UV−visible absorption stability. The nonlinear optical measurement of MAPbBr 3 /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 MAPbBr 3 /PMMA is also studied. Both the UV−visible absorption and nonlinear absorption over time prove the excellent stability of MAPbBr 3 /PMMA. The superior nonlinear refraction property of MAPbBr 3 /PMMA is also performed. The excellent reverse saturable absorption property and the nonlinear refraction property of MAPbBr 3 /PMMA result in superior optical limiting characteristics. This work implied that MAPbBr 3 /PMMA may be applied for future optical limiting devices.

Indium-Tin-Oxide-Induced Tunability of Nonlinear Optical Absorption from CH3NH3PbBr3 Nanostructure-Based Films: Implications for Nonlinear Optical Devices

“…The binding energy of Br 3d was attributed to CH 3 Br. 43 The binding energy of Pb 4f was derived from Pb 2+ , localized at Pb 4f 5/2 (143.1 eV) and Pb 4f 7/2 (138.3 eV). 44 The two peaks of the N 1s fit were at 400.4 and 401.8 eV, confirming the presence of two chemical environments of element N. 45 These results suggested the same composition between the MAPbBr 3 grown on the ITO buffer layer and the blank substrate.…”

“…The Br 3d spectra show two fitting peaks at 68.4 and 67.3 eV, corresponding to Br 3d 3/2 and Br 3d 5/2 , respectively. The binding energy of Br 3d was attributed to CH 3 Br . The binding energy of Pb 4f was derived from Pb 2+ , localized at Pb 4f 5/2 (143.1 eV) and Pb 4f 7/2 (138.3 eV) .…”

Excellent Nonlinear Optical Limiting Behavior of Tetra (C60) Lanthanum Phthalocyanine in Solid Poly(methyl methacrylate) Films

“…The results show that the OL values of the LaPc­(CHO) 4 /PMMA films show excellent OL performance, which are much lower than those of the LaPc-4­(C 60 ) solution. The significant improvement of the NLO performance may come from the stability of the polymer and the higher molecular concentration in the films accelerating the effective charge transfer between C 60 and LaPc, which indicate that the enhanced NLO and OL properties originate from an efficient intramolecular PET/ET process. , …”

“…60 and LaPc, which indicate that the enhanced NLO and OL properties originate from an efficient intramolecular PET/ET process 6,41. …”

“…With the rapid development of optical devices, materials with nonlinear optical properties gained great attention and applications in various fields. Phthalocyanines (Pcs) show intense visible region absorption and possess strong triplet excited state absorption (ESA), which make them have been studied for their nonlinear absorption properties for many years with a focus on optical power limiting materials. − These optical power limiting (OL) materials actively attenuate high-intensity light (achieve a certain threshold) while allowing low-intensity light to pass through and are used to prevent damage to sensitive optical detectors and human eyes, caused by laser light. − Pcs are extremely versatile and stable chromophores with unique physicochemical properties, which make them extremely suitable for the construction of molecular materials having excellent nonlinear optical properties. In general, the design of Pcs linked to strong acceptor moieties is particularly promising.…”