稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2015年
9期
915-921
,共7页
NaY(WO4)2:Eu3+%J-O parameter%quantum efficiency%photoluminescence%rare earths
Tetragonal phase NaY(WO4)2:Eu3+phosphors were synthesized through a molten salt method. The X-ray powder diffrac-tion (XRD) and field emission scanning electron microscopy (FE-SEM) were utilized to characterize the crystal structure and mor-phology. 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 NaY(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.
