LAUSR

Abstract A facile microwave-assisted hydrothermal method has been employed to synthesize a series of ScF3: x Eu3+, y Bi3+ (x = 0 −0.20, y = 0–0.05) crystals to improve the fluorescence performance by optimizing the concentrations of Eu3+ ions and Bi3+ ions. The as-obtained products then were characterized by thermal field emission scanning electron microscope (FE-SEM), X-ray powder diffractometer (XRD), high resolution transmission electron microscope (HRTEM), and photoluminescence (PL) spectrometer, systematically. The results manifest that the reaction temperature and reaction time play an significantly important role on the morphologies and sizes of the as-prepared products. Furthermore, the optical properties of ScF3: x Eu3+, y Bi3+ samples was investigated in detail. The emission spectra of ScF3: x Eu3+ recorded upon the excitation wavelength of 394 nm showed a strong emission peak located at 592 nm, which is corresponding to the magnetic dipole of the 5D0–7F1 transition of Eu3+ ions. Additionally, it was found that the luminescence of the samples has been deeply enhanced after the addition of an appropriate amount of Bi3+. The opportune concentration of Eu3+ and Bi3+ are x = 0.10 and y = 0.02, respectively.