Polymer encapsulation as an effective method for enhanced stability in perovskite quantum dots

摘要

We report the synthesis and characterization of Methyl Ammonium Lead Bromide perovskites and their quantum dots for efficient, colour tunable emitters that can be used as active materials in low-cost display, lighting applications and solar cells. In general, organic/inorganic perovskites are highly sensitive to atmospheric exposure limiting their commercial applications. In this work, a comparison on optical properties of Methyl Ammonium Lead Bromide Quantum Dots (MAPbBr_3 QDs) synthesized by Ligand-assisted Re-precipitation (LARP) technique in the presence and absence of Poly(methyl methacrylate) (PMMA) as a base matrix material is reported. The size distribution and quantum confinement of the synthesized material was confirmed using Transmission Electron Microscopy (TEM). The optical absorption and photoluminescence studies of the samples show stability even after 4 months of preparation proving that the polymer encapsulated MAPbBr_3 QDs are highly resistant to environmental degradation.