Rare-earth doped solid-state phosphor with temperature induced variable chromaticity

被引：15
作者：
Gouveia-Neto, A. S. [1 ]
Bueno, L. A. [1 ]
Nascimento, R. F. [1 ]
Silva, E. A. [1 ]
da Costa, E. B. [1 ]
机构：
[1] UFRPE Recife, Dept Fis, Lab Foton, BR-52171900 Recife, PE, Brazil
来源：
MATERIALS LETTERS | 2009年 / 63卷 / 23期
关键词：
Sensor; Glass-ceramics; Composites; Luminescence; Ceramics; Rare-earth; UP-CONVERSION EMISSION; MULTIPHONON RELAXATION; FLUORESCENCE; IONS; GREEN; FIBER; RED; LUMINESCENCE; ENHANCEMENT; LEAD;
D O I：
10.1016/j.matlet.2009.06.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Temperature induced variable chromaticity lanthanide muitidoped solid-state phosphors are presented. The phosphors are composed of ytterbium-sensitized multiple-doped (Tm, Er. Ho) PbGeO3-PbF2-CdF2 glass excited at 1.064 mu m. The temperature induced color variation exploits the heat enhanced effective absorption cross-section of the ytterbium sensitizer under quasi-resonance excitation. The temperature enhancement of the energy-transfer mechanism between the sensitizer and the appropriate active light emitter allows the selective intensity control of the RGB emissions due to distinct excitation routes. The suitable combination of active ions generated variable chromaticity light with CIE-1931 coordinates changing from CIE-X=0.283; Y=0.288 at 20 degrees C to CIE-X=0.349:Y=0.412 at 190 degrees C, and CIE-X=0.285: Y=0.361 at 25 degrees C to CIE-X=0.367; Y=0.434 at 180 degrees C in Yb3+/TM3+/Ho3+ and Yb3+/Tm3+/Er3+ samples, respectively. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1999 / 2002
页数：4
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