Improved optical photoluminescence by charge compensation and luminescence tuning in Ca6Ba(PO4)4O:Ce3+, Eu2+ phosphors

被引：24
|
作者：
Chen, Mingyue [1 ]
Xia, Zhiguo [1 ]
Liu, Quanlin [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
CRYSTENGCOMM | 2015年 / 17卷 / 45期
关键词：
LIGHT-EMITTING-DIODES; ENERGY-TRANSFER; WHITE-LIGHT; RED EMISSION; ENHANCEMENT; CATHODOLUMINESCENCE; HOST; IONS; CE3+; LEDS;
D O I：
10.1039/c5ce01766a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We comparatively investigated the effect of different charge compensators (Li+, Na+, K+ and Si4+) via the charge balance strategies of (i) 2Ca(2+) -> Ce3+ + M+ (M = Li, Na, K) and (ii) Ca2+ + P5+ -> Ce3+ + Si4+ on the photoluminescence (PL) properties of blue-emitting Ca6Ba.PO4)(4)O:Ce3+ phosphors. The optimized emission intensity was realized in Ca6Ba.PO4)(4)O:Ce3+ with codoping Li+. The different charge compensation mechanisms and PL enhancement were analysed. Moreover, tunable luminescence can be further achieved through the introduction of Eu2+ into the Ca6Ba.PO4)(4)O:Ce3+, Li+ phosphor, and charge compensation also plays an important role in the optimization of luminescence behaviours. It is proved that the emission spectra of Ca6Ba.PO4)(4)O:Ce3+, Li+, Eu2+ can be tuned from 463 to 528 nm through Ce3+-Eu2+ energy transfer (ET). The intrinsic ET mechanism and process have also been studied.
引用
收藏
页码：8632 / 8638
页数：7
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