Color tunable emission and energy transfer of Ce3+/Dy3+ codoped Ba3La2(BO3)4 phosphor for UV white LEDs

被引：19
|
作者：
Xiao, Fen [1 ]
Yi, Rongxi [1 ]
Yuan, Huiling [1 ]
Zang, Guanjian [1 ]
Xie, Chengning [1 ]
机构：
[1] Jinggangshan Univ, Coll Mech & Elect Engn, Jian 343009, Jiangxi, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2018年 / 202卷
基金：
中国国家自然科学基金;
关键词：
Phosphor; Luminescence; Borate; Energy transfer; LIGHT-EMITTING DIODES; PHOTOLUMINESCENCE PROPERTIES; LUMINESCENCE; DY3+; CE3+; EFFICIENT; HOST; MN2+;
D O I：
10.1016/j.saa.2018.05.061
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Polycrystalline Ba3La2(BO3)(4):Ce3+,Dy3+ sub-micrometer-sized phosphors were synthesized by solid-state reaction under a weak reductive atmosphere. The structure, static and time-resolved photoluminescence are investigated. Under the near-ultraviolet excitation, the Ba3La2(BO3)(4):Dy3+ phosphors emit white light with three intense emission bands centered at 483, 575, and 665 nm. The efficient energy transfer from Ce3+ to Dy3+ in Ba3La2(BO3)(4) phosphor was found by excitation/emission spectra and decay time measurements, and the resonant type was demonstrated by a dipole-dipole mechanism. A tunable emission hue from blue (0.18, 0.20) to blue-white (0.26, 0.29) and eventually to white (032, 0.33) was obtained in Ba3La2(BO3)(4):Ce3+,Dy3+ phosphors. Owing to the broad UV excitation band, indicating that Ba3La2(BO3)(4):Ce3+,Dy3+ phosphors can be considered as a potential candidate for ultraviolet-based white light-emitting diodes. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：352 / 358
页数：7
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