期刊
OPTICAL MATERIALS EXPRESS
卷 4, 期 4, 页码 649-655出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.4.000649
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资金
- National Science Foundation of China [51272282]
- Beijing Committee of Science and Technology, China [Z13111000280000]
- Education Commission of Beijing, China [2011010329]
- Foundation of Renmin University of China [12XNLF09]
- Main Direction Program of Chinese Academy of Science [KJCX2-EW-H07]
- Cooperation Project with Localities and Industries of Chinese Academy of Science [YDJDBSH-2011-006]
Modified YAG:Ce, Gd phosphors were synthesized by vacuum solid-state reaction. With the increase of Gd3+ concentration, the emission spectra of YAG: Ce, Gd phosphors shifted greatly to longer wavelength. At 400 K, YAG: Ce, Gd phosphors with 20 at.% Gd3+ could maintain 78% of room temperature intensity. Within the maximum junction temperature of a high brightness LED (around 400 K), the color coordinates of phosphors changed very little. In addition, white LEDs with a color rendering index of 82, luminous efficiency of 109 lm/W and color temperature of 5656 K were achieved by using optimized YAG:Ce, Gd phosphors. (C)2014 Optical Society of America
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