首页|Enhancing luminescence intensity and improving thermostability of red phosphors Li3Ba2La3(WO4)8:Eu3+ by co-doping with Sm3+ ions
Enhancing luminescence intensity and improving thermostability of red phosphors Li3Ba2La3(WO4)8:Eu3+ by co-doping with Sm3+ ions
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NSTL
Elsevier
Co-doping with Sm3+ ions into the Eu3+-doped phosphors can bring interesting properties due to the energy transfer of Sm3+→Eu3+. Herein, Sm3+/Eu3+ co-doped phosphors Li3Ba2La3(WO4)8:xSm3+/yEu3+ were synthesized to witness this fact. Upon excitation of 404 nm light, Sm3+/Eu3+ co-doped phosphors show the characteristic emissions of both Sm3+ and Eu3+. The intensity of Sm3+ emission decreases along with the improving Eu3+ concentration, whereas the intensity of Eu3+ emission gets promoted. For Li3Ba2La2.87Sm0.08Eu0.05(WO4)8, the quantum yield reaches up to 53%. Moreover, co-doping Sm3+/Eu3+ phosphor Li3Ba2La2.87Sm0.08Eu0.05(WO4)8 possess better fluorescence thermostability than sole Eu3+ doping phosphor Li3Ba2La2.87Sm0.08Eu0.05(WO4)8, by a factor of about two. The total PL integral intensity at 450 K of Li3Ba2La2.87Sm0.08Eu0.05(WO4)8 remains 83% of that at 300 K, ensuring its applications in high power White Light Emitting Diodes (WLED).
Energy transferPhosphorPhotoluminescenceSm3+/Eu3+Tungstate
Dai S.-J.、Dan Zhao、Zhang R.-J.、Jia L.、Yao Q.-X.
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College of Chemistry and Chemical Engineering Henan Polytechnic University
School of Chemistry and Chemical Engineering and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Liaocheng University
NSTL
Elsevier
