Luminescent properties of Eu3+ doped NaY（WO4）2 nanophosphors prepared by molten salt method
来源期刊：JOURNAL OF RARE EARTHS2015年第9期
论文作者：刘婷 孟庆裕 Hyo Jin Seo
文章页码：915 - 921
摘 要：Tetragonal phase Na Y（WO4）2:Eu3+ phosphors were synthesized through a molten salt method. The X-ray powder diffraction（XRD） and field emission scanning electron microscopy（FE-SEM） were utilized to characterize the crystal structure and morphology. The emission and excited spectra were used to study the photoluminescence properties. The results of XRD and FE-SEM indicated that the samples prepared by this method were pure phase and the particle size was about 50 nm. The PL results showed that Eu3+5D0→7F2 red luminescence at 616.5 nm could be excited by 394.5 nm near-UV light and 465 nm blue light in Na Y（WO4）2 host effectively, and the quenching concentration was 30 mol.%. The critical energy transfer distance and J-O parameters were calculated. The energy transfer type between Eu3+ was proved. What’s more, the quantum efficiencies of the 5D0 level of Eu3+ were calculated as well.
刘婷，孟庆裕，孙文军
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University
摘 要：Tetragonal phase Na Y（WO4）2:Eu3+ phosphors were synthesized through a molten salt method. The X-ray powder diffraction（XRD） and field emission scanning electron microscopy（FE-SEM） were utilized to characterize the crystal structure and morphology. The emission and excited spectra were used to study the photoluminescence properties. The results of XRD and FE-SEM indicated that the samples prepared by this method were pure phase and the particle size was about 50 nm. The PL results showed that Eu3+5D0→7F2 red luminescence at 616.5 nm could be excited by 394.5 nm near-UV light and 465 nm blue light in Na Y（WO4）2 host effectively, and the quenching concentration was 30 mol.%. The critical energy transfer distance and J-O parameters were calculated. The energy transfer type between Eu3+ was proved. What’s more, the quantum efficiencies of the 5D0 level of Eu3+ were calculated as well.
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