Chinese Journal of Lasers, Volume. 42, Issue 2, 206005(2015)
Preparation and Research of Ce, Pr:YAG Fluorescent Transparent Ceramics Applied to White LED
The CeO2, Al2O3, Y2O3, Pr6O11 powders in accordance with (Ce0.001PrxY0.999-x)3Al5O12 (x=0.001~0.005) are mixed and tableted. The Ce, Pr:YAG fluorescent transparent ceramics are obtained by sintering for 18 h in a vacuum induction furnace after cold isostatic pressing. The samples are subjected to X-ray diffraction (XRD) analysis and no other phase is founded except for the YAG phase. Emission spectra of the samples with different concentration of Pr3 + ions are tested and the red emission peaks of Pr3 + ions at 610 nm is founded. By changing the doping concentration of Pr3 + ions, the color temperature and color rendering index of white light are effectively adjusted. The experimental results show that when the atoms fraction of Pr3 + ions is 0.1% , the Ce, Pr:YAG transparent ceramics show preferable parameters with the luminous efficiency of 90 lm/W, the color temperature of 4905 K, the color rendering index of 80 and the color coordinates of (0.35, 0.41) under the injection current of 100 mA. The results of Ce, Pr:YAG have more advantages than those of traditional fluorescent materials in the color temperature and the color rendering index. So, it is expected to be applied in the field of indoor lighting.
Get Citation
Copy Citation Text
Ni Yi, Wang Kai, Zhou Shengming, Chen Chong, Yi Xuezhuan, Feng Yue. Preparation and Research of Ce, Pr:YAG Fluorescent Transparent Ceramics Applied to White LED[J]. Chinese Journal of Lasers, 2015, 42(2): 206005
Category: materials and thin films
Received: Aug. 15, 2014
Accepted: --
Published Online: Jan. 9, 2015
The Author Email: Ni Yi (niy2011@163.com)