Tunable blue-green color emitting phosphors Sr3YNa(PO4)3F:Eu2+, Tb3+ based on energy transfer for near-UV white LEDs

被引：26

作者：

Jin, Yahong ^{[1
]}

Lv, Yang ^{[1
]}

Hu, Yihua ^{[1
]}

Chen, Li ^{[1
]}

Ju, Guifang ^{[1
]}

Mu, Zhongfei ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, WaiHuan Xi Rd 100, Guangzhou NO100, Guangdong, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2017年 / 185卷

基金：

中国国家自然科学基金;

关键词：

Optical properties; Energy transfer; Color tunable; Rare-earth-doped materials; Phosphors; LUMINESCENCE PROPERTIES; BAND; EMISSION; DIODES;

D O I：

10.1016/j.jlumin.2017.01.004

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A series of Eu2+ and Tb3+ doped Sr3YNa(PO4)(3)F phosphors have been synthesized via a high temperature solid state reaction method. Eu2+ activated Sr3YNa(PO4)(3)F phosphors can be efficiently excited by light in the range of 220-420 nm, which matches well with the commercial n-UV LEDs, and show intense blue emission centered at 456 nm. The optimal doping concentration of Eu2+ is determined to be 1 mol%. The concentration quenching mechanism of Eu2+ in SYNPF host is mainly attributed to the dipole-dipole interaction. Energy transfer from Eu2+ to Tb3+ is observed when Eu2+ and Tb3+ are co-doped into Sr3YNa(PO4)(3)F host. Under excitation of 380 nm, the emission color can be varied from blue to green along with the increase of Tb3+ doping concentration. Based on decay curves, the energy transfer from the Eu2+ to Tb3+ ions is demonstrated to be a dipole-dipole mechanism. According to thermal quenching study by yoyo experiments of heating-cooling, Sr3YNa(PO4)(3)F:Eu2+, Tb3+ shows good thermal stability. The thermal quenching mechanism is also discussed. The results indicate that as-prepared samples might be of potential application in w-LEDs (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：106 / 111

页数：6

共 34 条

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