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- W2590405920 abstract "Abstract The tunable blue-emitting KBa 1− x (Mg/Zn) x Y 0.95 (BO 3 ) 2 :0.05Ce 3+ and K 1− y Na y BaY 0.95 (BO 3 ) 2 :0.05Ce 3+ phosphors have been investigated via cation substitution of Mg 2+ /Zn 2+ for Ba 2+ and Na + for K + in KBaY(BO 3 ) 2 host. The crystal structures, photoluminescence properties, thermal stability and the effect of Mg 2+ /Zn 2+ /Na + concentration on the luminescence characteristics were investigated in detail. The XRD analysis implied that KBa 1− x (Mg/Zn) x Y(BO 3 ) 2 solid solutions were limited, while continuous solid solution was possible in K 1− y Na y BaY(BO 3 ) 2 system. Upon the excitation at 365 nm, the emission peaks of KBa 1− x (Mg/Zn) x Y 0.95 (BO 3 ) 2 :0.05Ce 3+ (0 ⩽ x ⩽ 0.6) blue-shifted from 435 to 424 nm, and K 1− y Na y BaY 0.95 (BO 3 ) 2 :0.05Ce 3+ (0 ⩽ y ⩽ 1) blue-shifted from 435 to 427 nm with the Mg 2+ /Zn 2+ /Na + doping concentration increase. The thermal stabilities of KBa 1− x (Mg/Zn) x Y 0.95 (BO 3 ) 2 :0.05Ce 3+ phosphors were enhanced from 20 °C to 200 °C by increasing the concentration of Mg 2+ and Zn 2+ . The substitution of Na + for K + led to a decrease in the proportion of 5 D- 2 F 5/2 and 5 D- 2 F 7/2 corresponding to the Gaussian fitting of Ce 3+ in K 1− y Na y BaY 0.95 (BO 3 ) 2 :0.05Ce 3+ phosphors. At the temperature increased, the full width at half maximum of photoluminescence band of K 0.8 Na 0.2 BaY 0.95 (BO 3 ) 2 :0.05Ce 3+ decreased. However, the decreasing trend of FWHM became less obvious with the increasing concentration of Na + in the temperature dependent photoluminescence spectra of K 1− y Na y BaY 0.95 (BO 3 ) 2 :0.05Ce 3+ phosphors." @default.
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- W2590405920 date "2017-08-01" @default.
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- W2590405920 title "Structure and luminescence properties of Ce 3+ doped KBa 1 − x (Mg/Zn) x Y(BO 3 ) 2 and K 1 − y Na y BaY(BO 3 ) 2 phosphors evolved from cation substitution" @default.
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- W2590405920 doi "https://doi.org/10.1016/j.optlastec.2017.01.027" @default.
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