Quantum efficiency and energy transfer processes in rare-earth doped borate glass for solid-state lighting

被引：60
作者：
Steudel, Franziska [1 ]
Loos, Sebastian [2 ]
Ahrens, Bernd [1 ,2 ]
Schweizer, Stefan [1 ,2 ]
机构：
[1] Fraunhofer Inst Mech Mat IWM, Branch Lab, Fraunhofer Applicat Ctr Inorgan Phosphors, D-59494 Soest, Germany
[2] South Westphalia Univ Appl Sci, Dept Elect Engn, D-59494 Soest, Germany
来源：
JOURNAL OF LUMINESCENCE | 2016年 / 170卷
关键词：
Photon conversion; Rare-earth ion doping; Energy transfer; LED; Colour management; OPTICAL-PROPERTIES; IONS; FLUORESCENCE; SPECTROSCOPY; DY3+; TB3+; SM3+; PHOTOLUMINESCENCE; LUMINESCENCE; SPECTRA;
D O I：
10.1016/j.jlumin.2015.07.032
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Sm3+, Eu3+ and Tb3+ doped borate glass is investigated for its potential as light converting phosphor for solid-state lighting applications. Concentration-dependent luminescence, quantum efficiency and radiative lifetimes are analysed. The luminescence quantum efficiency exceeds values of more than 80%. Cross-relaxation processes in the single-doped glasses result in luminescence quenching for Sm3+ with increasing doping level, whereas for Eu3+ and Tb3+ an increase is observed. In Sm3+/Eu3+ and Tb3+/Eu3+ double-doped glass the energy transfer processes between the rare-earth ions are investigated in detail. The colour coordinate of the Tb3+/Eu3+ double-doped glass can be shifted from the green to the red spectral range by changing the Tb3+-to-Eu3+ ratio in favour of Eu3+. In addition, double doping allows for a change in colour coordinate by using different excitation wavelengths. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：770 / 777
页数：8
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