Dy3+-, Tb3+-, and Eu3+-activated NaCa4(BO3)3 phosphors for lighting based on near ultraviolet light emitting diodes

被引：12

作者：

Shi, Meiling ^{[1
]}

Zhu, Chaofeng ^{[1
]}

Wei, Mingzhi ^{[1
]}

He, Zhigang ^{[1
]}

Lu, Meng ^{[1
]}

机构：

[1] Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Key Lab Proc & Testing Technol Glass & Funct Cera, Jinan 250353, Shandong, Peoples R China

来源：

VACUUM | 2018年 / 149卷

关键词：

Phosphor; Light emitting diode; Luminescence; Energy transfer; ENERGY-TRANSFER PROPERTIES; PHOTOLUMINESCENT PROPERTIES; ENHANCED LUMINESCENCE; COLOR; EU3+; MICROSTRUCTURE; EFFICIENT; EMISSION; SM3+; UV;

D O I：

10.1016/j.vacuum.2018.01.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A variety of Dy3+-, Tb3+- and Eu3+-singly or doubly or triply activated NaCa4(BO3)(3) phosphors for light emitting diodes applications were synthesized via a high temperature solid state reaction technique under an ambient atmosphere. These phosphors were studied by X-ray diffraction, scanning electron microscopy, photoluminescence excitation and emission spectra, Commission International de I'Eclairage chromaticity coordinates, and correlated color temperatures. The emission colors of Dy3+-, Tb3+-, and Eu3+-doped phosphors can be successfully tuned from green to yellow and then to white by appropriately changing the Tb3+ content and the excitation wavelengths. The correlated color temperatures can also be tailored from cold color to warm color. Furthermore, the energy transfer process from Dy3+ to Tb3+ in the Dy3+/Tb3+ codoped phosphors exists, which is discussed based on the luminescence spectra and energy level diagram analysis. The NaCa4(BO3)(3):Dy3+, Tb3+, Eu3+ phosphors reported here demonstrate promising applications in the fields of near ultraviolet based light emitting diodes. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：343 / 349

页数：7

共 37 条

[1] Luminescence Dynamics in Tb3+-Doped CaWO4 and CaMoO4 Crystals [J].