Journal
NEW JOURNAL OF CHEMISTRY
Volume 40, Issue 12, Pages 10136-10143Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nj02734b
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Funding
- National Natural Science Foundation of China [21476045]
- Foundation of key laboratory for micro/nano technology and system of Liaoning province [20140401]
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An excellent light-emitting diodes phosphor must possess effective absorption, high quantum efficiency, high quenching temperatures, and high color purity. Our synthesized LiGd(WO4)(2):Eu3+ materials possess all of these properties. Excitation of these phosphors with ultraviolet radiation yields bright red emission at 617 nm due to the D-5(0) -> F-7(2) transition of Eu3+ ions. Compared with different Eu3+ doping concentrations, LiGd(WO4)(2):80%Eu3+ phosphor has optimal photoluminescence properties and shows internal quantum efficiency as high as 69%. More impressive is its good thermal stability; when heated up to 150 degrees C, the LiGd(WO4)(2):80%Eu3+ phosphor still has 81% of its initial emission intensity at room temperature. Furthermore, the LiGd(WO4)(2):80%Eu3+ phosphor shows high purity of red emission with coordinate values (x = 0.656, y = 0.334). The abovementioned results suggest that the LiGd(WO4)(2):80%Eu3+ phosphor can be a suitable red-emitting candidate for ultraviolet-excited white light-emitting diodes.
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