Plasmon-Enhanced Blue-Light Emission of Stable Perovskite Quantum Dot Membranes
Kai Gu1, Hongshang Peng2,3, Siwei Hua4
1College of Science, Minzu University of China, Beijing 10081, China. kai_gu94@163.com.
Abstract:
A series of stable and color-tunable MAPbBr3-xClx quantum dot membranes were fabricated via a cost-efficient high-throughput technology. MAPbBr3-xClx quantum dots grown in-situ in polyvinylidene fluoride electrospun nanofibers exhibit extraordinary stability. As polyvinylidene fluoride can prevent the molecular group MA+ from aggregating, MAPbBr3-xClx quantum dots are several nanometers and monodisperse in polyvinylidene fluoride fiber. As-prepared MAPbBr3-xClx quantum dot membranes exhibit the variable luminous color by controlling the Cl- content of MAPbBr3-xClx quantum dots. To improve blue-light emission efficiency, we successfully introduced Ag nanoparticle nanofibers into MAPbBr1.2Cl1.8 quantum 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-xClx quantum dots is proposed based on simulating optical field distribution of the research system.
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