Tunable visible upconversion emission in Er3+/Yb3+-codoped KCaBO3 phosphors by introducing Ho3+ ions

被引：27

作者：

Das, Subrata ^{[1
]}

Reddy, A. Amarnath ^{[1
]}

Babu, S. Surendra ^{[2
]}

Prakash, G. Vijaya ^{[1
]}

机构：

[1] Indian Inst Technol Delhi, Dept Phys, Nanophoton Lab, New Delhi 110016, India

[2] Res Ctr Imarat, Directorate Laser Syst, Hyderabad 500069, Andhra Pradesh, India

来源：

MATERIALS LETTERS | 2014年 / 120卷

关键词：

Optical materials and properties; Phosphors;

D O I：

10.1016/j.matlet.2014.01.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Herein, the tunable upconversion (UC) emission from KCaBO3 phosphors, codoped with fixed Er3+, Yb3+ and various Ho3+-concentrations, has been demonstrated. Under 980 nm laser excitation, strong tunability from green to red color emission was successfully achieved via controlling the Ho3+-codoping in KCaBO3:Er(3+)Yb(3+)xHo(3+) phosphor due to efficient two-photon excitations and inter-ion energy transfer (from Yb3+ to Er3+/Ho3+) mechanisms. Substantial decrease in the green-red intensity ratio from 3.94 to 0.21 and systematic enhancement in energy transfer efficiency (eta), with the increment of Ho3+-content, supported the above mechanisms. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：232 / 235

页数：4

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