The first rare-earth lead phosphates Pb3AP3O12 (A=Sc, Gd) with remarkable SHG enhancement
The first rare-earth lead phosphates Pb3AP3O12 (A=Sc, Gd) with remarkable SHG enhancement
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第一个具有显着倍频增强功能的稀土磷酸铅 Pb3AP3O12 (A=Sc, Gd)
DOI：
10.1016/j.jssc.2020.121276
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发表时间：
2020-06
影响因子：
3.3
通讯作者：
Xiaohong Wu
中科院分区：
文献类型：
--
作者：
Ming Wen;Hongping Wu;Hongwei Yu;Xiaohong Wu
Two new phosphates Pb3AP3O12(A = Sc, Gd), have been synthesized through the high-temperature solution method. They crystallize in the same noncentrosymmetric space groupI¯43d, and feature a three-dimensional A–O (A = Pb0.75Sc0.25or Pb0.75Gd0.25) framework with the isolated PO4tetrahedra filled in the space of framework. The UV–vis–NIR diffuse reflectance spectra show their band gaps are 4.4 and 4.3 eV, respectively. Interestingly, Pb3ScP3O12exhibits a quite weak second harmonic generation (SHG) responses, less than 0.05 × KH2PO4(KDP), whereas the isomorphic Pb3GdP3O12shows a much larger SHG response, 0.6 × KDP. The relationship between structures and properties indicates that the enhanced SHG response of Pb3GdP3O12originates from the effect of rare-earth on the distortion of [Pb0.75/Gd0.25O6] octahedron.
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