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Polycrystalline Yb:Gd 2 GeO 5 was prepared by solid state reaction method, and its structure, spectral properties, and energy structure were studied. The Yb:Gd 2 GeO 5 belongs to space group P2 1 /c, and its photoluminescence spectrum includes the range from 975 to 1088nm which is one of the known broader emission of Yb 3+ . The broad emission spectrum...
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