MAPbBrnanocrystals from aqueous solution for poly(methyl methacrylate)-MAPbBrnanocrystal films with compression-resistant photoluminescence.
Nanotechnology
Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, United States of America.
Published: March 2022
In this work, we develop an environmental-friendly approach to produce organic-inorganic hybrid MAPbBr(MA = CHNH) perovskite nanocrystals (PeNCs) and PMMA-MAPbBrNC films with excellent compression-resistant PL characteristics. Deionized water is used as the solvent to synthesize MAPbBrpowder instead of conventionally-used hazardous organic solvents. The MAPbBrPeNCs derived from the MAPbBrpowder exhibit a high photoluminescence quantum yield (PLQY) of 93.86%. Poly(methyl methacrylate) (PMMA)-MAPbBrNC films made from the MAPbBrPeNCs retain ∼97% and ∼91% of initial PL intensity after 720 h aging in ambient environment at 50 °C and 70 °C, respectively. The PMMA-MAPbBrNC films also exhibit compression-resistant photoluminescent characteristics in contrast to the PMMA-CsPbBrNC films under a compressive stress of 1.6 MPa. The PMMA-MAPbBrNC film integrated with a red emissive film and a blue light emitting source achieves an LCD backlight of ∼114% color gamut of National Television System Committee (NTSC) 1953 standard.
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