Micro-defects and optical properties of YAG:Ce crystals prepared by optical floating zone method
Micro-defects and optical properties of YAG:Ce crystals prepared by optical floating zone method
复制标题
光学浮区法制备YAG:Ce晶体的微观缺陷及光学性能
DOI:
10.1142/s0217979217440684
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发表时间:
2017-07
期刊:
影响因子:
--
通讯作者:
Yuyang Huang
中科院分区:
文献类型:
--
作者:
Yan Meng;Xiuqing Cao;Dingkan Xiong;Yuyang Huang
The Y3Al5O12 (YAG):Ce ceramic rods and single crystals were prepared by solid state reaction and optical floating zone method, respectively. The XRD results showed that the phases in the YAG:Ce ceramics are mixture of YAG phase and YAlO3 (YAP) phase. There is only a single YAG phase in the single crystals of YAG:Ce. The mean positron lifetime of the YAG:Ce crystal decreases with increasing Ce content, and reaches minimum at 1 at.% Ce, then increases with Ce content. The mean positron lifetime of the YAG:Ce crystal is higher than that of YAG:Ce ceramic with the same chemical composition. The UV–visible absorption spectra of the YAG:Ce crystals indicated that the transmittances of the YAG:Ce crystals are higher than 90% in the wavelength range from 550 nm to 800 nm. The photoluminescence spectra of the YAG:Ce crystals showed wide luminescence emission peaks located in the range of 525–529 nm. A relatively high luminescence intensity is found in the YAG:Ce crystal with 1 at.% Ce. With further increase of Ce content, the luminescence decreases due to the fluorescence quenching effect.
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