Synthesis and luminescent properties of Zn0.890Nb2O6:Eu0.053+, Bi0.0053+, M0.055+ (M = Li, Na, K) phosphors
Synthesis and luminescent properties of Zn0.890Nb2O6:Eu0.053+, Bi0.0053+, M0.055+ (M = Li, Na, K) phosphors
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DOI：
10.1016/j.cap.2012.08.004
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发表时间：
2013-03-01
影响因子：
2.4
通讯作者：
Liang, Zhijuan
中科院分区：
文献类型：
--
作者：
Mo, Fuwang;Zhou, Liya;Liang, Zhijuan
Zn1-xNb2O6:Eu-x(3+), Zn0.95-yNb2O6:Eu-0.05(3+), Bi-y(3+), and Zn0.890Nb2O6:Eu-0.05(3+), Bi-0.005(3+), M-0.055(+) (M = Li, Na, K) red-emitting phosphors were synthesized via sol-gel method. X-ray power diffraction, scanning electron microscopy, photoluminescence excitation, and emission spectra (PL) were used to characterize the phosphors. The obtained Zn1-xNb2O6:Eu-x(3+) phosphor showed a stronger excitation band near 400 nm. When Eu3+ and Bi3+ were incorporated into the ZnNb2O6 lattice, a broad band from 300 nm to 350 nm with the center at 329 nm appeared. Taking the ion size difference of Li+ (59 pm), Na+ (99 pm), K+ (137 pm), Eu3+ (95 pm), and Zn2+ (60 pm), the emitting intensity of the phosphor increased observably by adding Li+ and Na+ as charge compensators. The PL intensity of the K+-doped in Zn0.945Nb2O6:Eu-0.05(3+), Bi-0.005(3+) was slightly less than those of Zn0.945Nb2O6:Eu-0.05(3+), Bi-0.005(3+). The chromaticity coordinates of Zn0.890Nb2O6:Eu-0.05(3+), Bi-0.005(3+), Li-0.055(+) (x = 0.67, y = 0.34) were close to the standard of National Television Standard Committee values (x = 0.670, y = 0.330). The fabricated light-emitting diode (LED) further confirmed that the Zn0.890Nb2O6:Eu-0.05(3+), Bi-0.005(3+), Li-0.055(+) phosphors can efficiently absorb up to 400 nm irradiation and emit red light, and are potential candidates as red-emitting components for white LED. (c) 2012 Elsevier B.V. All rights reserved.
