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

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.

Optical quantum yield in plasmonic nanowaveguide

“…In this section, we perform numerical simulation for the quantum yield for a general plasmonic nanohybrids. We will also compare our theory with experiments for a specific plasmonic nanohybrid of [13]. Recently Gu et al [13] have fabricated a metallic nanowaveguide where the core is fabricated from the PVP-Ag layer and the cladding is made of PVDF-PQDs layer.…”

“…In this section, we calculate the light propagation in plasmonic nanowaveguides made of QDs and MNPs. This type of nanowaveguides has been fabricated in [13] where PQDs and Ag-MNPS are used. The cladding is made of an ensemble of PQDs embedded in a dielectric material and the core is fabricated from an ensemble of MNPs embedded in a dielectric material.…”

“…An analytical expression of the PL is also found using the density matrix method. In section 4, we have compared our theory with experiments of [13]. Finally, we have summarized the findings.…”

“…However, there is not much effort has been devoted to study the plasmonic properties of nanowaveguides fabricated from QDs and MNPs. Recently Gu et al [13] have fabricated a PQDs-layer/Ag MNPs-layer/PQDs-layer as an analytical periodic unit. Here PQDs stand for perovskite quantum dots.…”

Nano–Micro Dimensional Structures of Fiber‐Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

“…demonstrated sandwiched layer‐by‐layer structure of silver (Ag) PVP nanofiber mat between OIHP (MAPbBr 1.2 Cl 1.8 ) PVDF nanofiber mats. [ 128 ] The well matched plasmonic resonance band of Ag nanofibers and PL spectrum of OIHP nanofibers as well as the confinement from the nanofiber morphology, PL of stacked hybrid membrane layer was enhanced up to 4.8 times of that of OIHP‐only nanofibers.…”