Plasmon-Enhanced Blue-Light Emission of Stable Perovskite Quantum Dot Membranes

A series of stable and color-tunable MAPbBr3−xClxquantum dot membranes were fabricated via a cost-efficient high-throughput technology. MAPbBr3−xClxquantum dots grown in-situ in polyvinylidene fluoride electrospun nanofibers exhibit extraordinary stability. As polyvinylidene fluoride can prevent the molecular group MA+from aggregating, MAPbBr3−xClxquantum dots are several nanometers and monodisperse in polyvinylidene fluoride fiber. As-prepared MAPbBr3−xClxquantum dot membranes exhibit the variable luminous color by controlling the Cl−content of MAPbBr3−xClxquantum dots. To improve blue-light emission efficiency, we successfully introduced Ag nanoparticle nanofibers into MAPbBr1.2Cl1.8quantum dot membranes via layer-by-layer electrospinning and obtained ~4.8 folds fluorescence enhancement for one unit. Furthermore, the originality explanation for the fluorescence enhancement of MAPbBr3−xClxquantum dots is proposed based on simulating optical field distribution of the research system.