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Abstract In this work, CaF2:Ln3+ (Ln:Er,Er/Yb)/Nafion composite films were prepared using Nafion as modifications and matrices by dripping method. The composite films were characterized by Fourier transform infrared spectroscopy (FT-IR),… Click to show full abstract
Abstract In this work, CaF2:Ln3+ (Ln:Er,Er/Yb)/Nafion composite films were prepared using Nafion as modifications and matrices by dripping method. The composite films were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Composite films are transparent and CaF2:Ln3+ (Ln:Er,Er/Yb) nanoparticles are well dispersed in Nafion films. The thicknesses of CaF2:Er3+/Nafion and CaF2:Er3+,Yb3+/Nafion composite film are about 77 and 73 μm, respectively. The nanoparticles in composite film possess cubic phase. CaF2:Er3+,Yb3+/Nafion composite film has stronger characteristic emission of Er3+ around 1530 nm with full width at half-maximum (FWHM) of 73 nm and longer luminescence lifetimes of 22.04 μs (25.03%) and 100.77 μs (74.97%).
Journal Title: Journal of Rare Earths
Year Published: 2019
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