Origin of visible and near IR upconversion in Yb3+-Tm3+-Er3+ doped BaMgF4 phosphor through energy transfer and cross-relaxation processes

被引：9

作者：

Kore, Bhushan P. ^{[1
]}

Kumar, Ashwini ^{[2
]}

Kroon, Robin E. ^{[2
]}

Terblans, Jacobus J. ^{[2
]}

Swart, Hendrik C. ^{[2
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India

[2] Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa

来源：

OPTICAL MATERIALS | 2020年 / 99卷

基金：

新加坡国家研究基金会;

关键词：

LUMINESCENT MATERIALS; OPTICAL THERMOMETRY; TM3+; BLUE; YB3+; EMISSION; GREEN; ER3+; NANOCRYSTALS; LASER;

D O I：

10.1016/j.optmat.2019.109511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Near infrared and green, red emission through upconversion and energy transfer processes in BaMgF4 doped with Yb3+-Tm3+ and Yb3+-Tm3+-Er3+ excited at 980 nm were investigated. The BaMgF4:Yb3+,Tm3+ phosphor showed a dominating UC emission at 800 nm. The origin of this 800 nm emission peak was explored through different possible cross-relaxation processes. The optimized composition of Yb3+ and Tm3+ was further co-doped with Er3+, these compositions also showed dominating 800 nm emission for lower concentrations of Er3+ which was gradually suppressed at higher Er3+ concentration. The enhancement of the visible emission of EP3+ in the BaMgF4:Yb3+, Tm3+, xEr(3+) doped phosphor suggests the efficient energy transfer from Yb3+ to Tm3+ and Tm3+ to Er3+. By tuning the concentrations of the dopants, a near white light emission under infrared excitation was also achieved.

引用

页数：7

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