Growth and Spectral Properties of Si4+ Co-Doped Yb:YAG Single Crystal [Si4+共掺杂Yb:YAG单晶生长和光谱特性研究]

作者：Tian R.; Zhang L.; Pan M.; Qi H.

来源：Journal of Synthetic Crystals, 2021, 50(10): 1957-1962.

• Czochralski method
• Detecting sensitivity
• Scintillation property
• Si4+ doping
• Yb:YAG crystal

The single crystals of Yb3+-doped and Si4+ co-doped Y3Al5O12 (YAG) were grown by the Czochralski method. Both crystals belong to the cubic system with the Oh10-Ia3d space group. The addition of Si4+ does not change their crystal structure, but changes the luminescent ions valent. The absorption spectrum manifests that the substitution of Al3+ by Si4+ leads to the transformation of Yb3+ to Yb2+ for the charge balance, and then reduces the luminous intensity of Yb:YAG. The X-ray and γ-ray excited luminescence (XEL) measurement shows that the luminous intensity of Si4+ co-doped Yb:YAG is about 63% and 40% of Yb:YAG, respectively. Additionally, because of the isotope of Yb, Yb:YAG can even be excited by neutrons with nuclear reaction, the charge particles cause secondary reactions to produce fluorescence. The fluorescence intensity is still determined by Yb3+, thus the sensitivity for neutron is also reduced by Si4+ co-doping.

• 单位
  中国科学院大学