Synthesis of CeO2:xEu3+, yAl3+ Nanocrystals by Sol-gel Method and Investigation of Their Optical Properties
Main Article Content
Abstract
In the present paper, CeO2:xEu3+, yAl3+ nano phosphors with different concentrations of Eu3+ (x = 0.02, 0.04 and 0.06) and Al3+ (y = 0.02, 0.04, 0.06, and 0.08) were investigated. The as-prepared samples were successfully synthesized by sol-gel method and annealed at 600 °C to improve crystallinity. These nanoparticles are characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, UV-Vis spectroscopy and photoluminescence (PL) studies. X-ray diffraction analysis showed that all the samples exhibit a pure fluorite type of CeO2, indicating success in the Eu3+ and Al3+ doping in the host lattice. In the Raman spectra of the samples occurs the vibrational mode F2g, which is a characteristic band of ceria cubic fluorite lattice. The photoluminescence results revealed that the optimal doping concentration of Eu3+ is 0.04 in the CeO2 host. Moreover, when Al3+ ions co-doped in the host, there is an enhancement in the luminescence intensities, and the optimal doping concentration of Al3+ is determined to be 0.04.
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