Tunable YAG:Ce3+ ceramic phosphors for white laser-diode lighting in transmissive/reflective models

被引:24
作者
Hu, Pan [1 ,2 ]
Liu, Yongfu [1 ]
Sun, Peng [1 ]
Yao, Qi [1 ]
Liu, Zehua [1 ]
Luo, Zhaohua [1 ]
Chao, Kefu [3 ]
Jiang, Haochuan [1 ]
Jiang, Jun [1 ]
机构
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Inner Mongolia Normal Univ, Coll Phys & Elect Informat, Hohhot 010022, Peoples R China
基金
中国国家自然科学基金;
关键词
YAG:Ce3+; Ceramic phosphors; Light scatter; Laser-diode lighting; COLOR-RENDERING INDEX; IN-GLASS; TRANSPARENT CERAMICS; EMITTING-DIODES; EFFICIENCY; LUMINESCENCE; CONVERTER; PERFORMANCE; FABRICATION; GENERATION;
D O I
10.1016/j.materresbull.2021.111297
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Y3Al5O12:Ce3+ (YAG:Ce3+) transparent ceramic phosphor (TCP) is one of the most promising converters for the laser-diode (LD) lighting because it has good capacity for absorbing blue light and prominent luminous efficiency (LE). A challenge is how to achieve a high-quality YAG:Ce3+ TCP to realize a high LE value. We propose a strategy to depress the defects by using the charge-balanced Mg2+-Si4+ to substitute the Al3+-Al3+. Benefiting from the flux effect of MgO and SiO2, the transmittance of the YAG:Ce3+ TCP (thickness of 1 mm) increases from 13 % to 70 % by controlling the pores in the TCP. By introducing Al2O3 to be one kind of light scatters to enhance the blue light absorption, the LE reaches 185.7 lm/W, which is much higher than the value (137 lm/W) of the same TCP previously reported. These results evidence that the optimized YAG:Ce3+ TCP has an excellent performance in LD lighting. Prototype white LD devices are demonstrated in both the transmissive and the reflective models.
引用
收藏
页数:8
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