Abstract
NaYF4: Eu+3nanophosphor/polyvinyl alcohol (PVA) composite nanofibers have been successfully fabricated using the electrospinning technique. The electrospun polymeric nanofibers were characterized by scanning electron microscopy (SEM), high-resolution transmission microscopy (HRTEM), X-ray diffraction (XRD), photoluminescence (PL), and Raman spectroscopy. The flexible polymeric mats exhibited strong red emission at 724 nm at excitation wavelength of 239 nm. 5% concentration of NaYF4: Eu+3nanophosphor are embedded homogenously inside the PVA matrix. The strong red emission peak attributed to the presence of Eu+3ions. The characterization of the mats confirmed the uniform dispersion and tunable photoluminescence properties. These photoluminescent nanofibers (PLNs) could be easily fabricated and potentially useful in solid-state lighting applications.
Highlights
The fascinating one-dimensional (1D) nanostructures have captured the attention of scientific community because of their outstanding properties such as high surface area to volume ratio and flexible and tunable surface morphologies
The 1D nanofibers have already been prepared by catalytic synthesis, interfacial polymerization, vapor deposition, vapor-phase transport process, gel spinning, electrospinning, self-assembly, template synthesis, melt spinning, electrostatic spinning and drawing, etc. [1–4]
In most of the studies, electrospun nanofibers have been prepared for the solid-state lighting from various polymers such as polyvinyl alcohol (PVA), polyacrylonitrile (PAN), poly(methyl methacrylate) (PMMA), polystyrene (PS), poly(ethylene oxide) (PEO), polyvinylpyrrolidone (PVP), polyvinylidene diflouride (PVdF), polyvinylcarbazole (PVK), poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV), and polydiallyldimethylammonium chloride (PDAC) by using different additives
Summary
The fascinating one-dimensional (1D) nanostructures have captured the attention of scientific community because of their outstanding properties such as high surface area to volume ratio and flexible and tunable surface morphologies. There is no doubt that this technique is cost-effective, simple, and convenient that utilizes electrostatic forces to fabricate polymeric exceptionally long and uniform 1D nanofibers with large surface area and high length-diameter ratio [5–8] It is successfully developing continuous and long ultrathin fibers from polymers, composites of inorganic and organic luminescent nanoparticles with polymers, metals, and semiconductors, with diameters ranging from micrometer (μm) to nanometer (nm). In most of the studies, electrospun nanofibers have been prepared for the solid-state lighting from various polymers such as polyvinyl alcohol (PVA), polyacrylonitrile (PAN), poly(methyl methacrylate) (PMMA), polystyrene (PS), poly(ethylene oxide) (PEO), polyvinylpyrrolidone (PVP), polyvinylidene diflouride (PVdF), polyvinylcarbazole (PVK), poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV), and polydiallyldimethylammonium chloride (PDAC) by using different additives. Cadmium sulfide (CdS), cerium-doped yttrium aluminum garnet (YAG: Ce3+; Y3−xAl5 O12: Cex3+), silica nanoparticle (SNP), fullerene (C60), europium-doped lutetium oxide (Lu2O3:Eu3+), europium-doped zirconium dioxide (ZrO2:Eu3+), germanium nanocrystals (Ge-NCs), terbium-doped silicon dioxide (SiO2:Tb3+), europium, ytterbium, erbium-doped sodium yttrium fluoride luminescent composite nanophosphor (NaYF4: Eu3+ @ NaYF4: Yb3+, Er3+), and cyclopentadiene
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