期刊
OPTICS AND LASER TECHNOLOGY
卷 85, 期 -, 页码 7-13出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2016.05.017
关键词
Phosphors; Solid state reaction; Luminescent properties; LEDs
资金
- National Key Technology R&D Program of the 12th Five-year Plan of China [2011BAE30B03]
- Graduate Innovation Fund of Shaanxi University of Science and Technology [SUST-2016]
The novel red-emitting Na3Gd2-x(BO3)(3):xEu(3+) phosphors were synthesized by a solid-state method. Under near ultraviolet excitation, the phosphors exhibit dominant emission peak at 614 nm and generate bright red light, which is attributed to the electric-dipole transition D-5(0)-> F-7(2). The optimal doping amount of Eu3+ in Na3Gd2-x(BO3)(3):xEu(3+) phosphors is x=0.3 for the maximum emission. The exchange interaction between Eu3+ ions is identified to be the main mechanism in the concentration quenching process. The CIE color coordinates of the Na3Gd2-x(BO3)(3):xEu(3+) phosphors (x=0.650, y=0.350) are close to the NTSC standard values of red. With a relatively high quantum efficiency of 35.2%, Na3Gd2-x(BO3)(3):xEu(3+) red-emitting phosphor is probably a promising candidate for near ultraviolet based white LEDs application. (C) 2016 Elsevier Ltd. All rights reserved.
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