Tunable photoluminescence properties of Ca8NaLa(PO4)6F2:Eu2+,Mn2+ phosphor under UV excitation

被引：17

作者：

Zhang, Fen ^{[1
]}

Lan, Tong ^{[1
]}

Tang, Wanjun ^{[1
]}

机构：

[1] South Cent Univ Nationalities, Coll Chem & Mat Sci, Hubei Key Lab Catalysis & Mat Sci, Wuhan 430074, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 64卷

关键词：

Optical materials; Optical properties; X-ray diffraction; Phosphors; EFFICIENT ENERGY-TRANSFER; WHITE-LIGHT; SINGLE-PHASE; LUMINESCENCE; MN2+; MECHANISM;

D O I：

10.1016/j.materresbull.2014.12.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of Eu2+ and Mn2+ coactivated Ca8NaLa(PO4)(6)F-2 (CNLF) phosphors have been synthesized by a combustion-assisted synthesis method. The investigation revealed that Ca8NaLa(PO4)(6)F-2 crystallized in a hexagonal crystal system with the space group P6(3)/m (176). The Eu2+ activated phosphors can be efficiently excited in the range of 270-400 nm and give intense blue emission peaking at 451 nm. By codoping the Eu2+ and Mn2+ ions into the CNLF host and singly varying the doping content of the Mn2+ ion, tunable colors from blue to white and eventually to yellow are obtained in CNLF:Eu2+,Mn2+ phosphors under the irradiation of 330 nm. The energy transfer from Eu2+ to Mn2+ in CNLF:Eu2+,Mn2+ has been demonstrated to be a resonant type via a dipole-dipole mechanism and the critical distance of energy transfer from Eu2+ to Mn2+ was estimated to be about 11.9 angstrom. The investigation indicates that the obtained samples might have potential application in white LEDs. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：128 / 133

页数：6

共 29 条

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