期刊
OPTICAL MATERIALS
卷 83, 期 -, 页码 93-98出版社
ELSEVIER
DOI: 10.1016/j.optmat.2018.05.074
关键词
High quantum efficiency; Mn4+-doped red phosphors; UV and blue excited; Double perovskite structure
资金
- National Natural Science Foundation of China [51472162, 51672177, 61605115]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2014062]
- Shanghai Sailing Project [15YF1411800]
High quantum efficiencies CaLaMgM1-xO6:xMn(4+) (M = Nb, Ta; 0 < x <= 0.006) phosphors are prepared by a solid-state reaction method, and their crystal structure and luminescence property are investigated. The excitation spectra of CaLaMgM1-xO6:xMn(4+) revealed two excitation bands at 250-450 nm and 450-600 nm corresponding to (4)A(2) -> T-4(1) and (4)A(2) -> T-4(2) transition of Mn4+ ions respectively, and emission spectra cover from 650 to 800 nm with the strongest emission peak at 710 nm owing to the E-4 -> (4)A(2) transition of Mn4+ ions. The optimal Mn4+ doping concentrations for both of CaLaMgNbO6 and CaLaMgTaO6 host are determined to be 0.004 mol. The PL intensity and quantum efficiencies of the entitled phosphors excited under related UV light are investigated and compared with that of K2TiF6:Mn4+, Y2O3:Eu3+, CaAlSiN3:Eu2+ phosphors. Finally, a bright red LED was fabricated by using a 365 nm UV chip with the as-prepared CaLaMgNbO6:Mn4+ phosphor.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据