Defect induced visible-light-activated near-infrared emissions in Gd3−x−y−zYbxBiyErzGa5O12
作者： Liping Tong , Katsuhiko Saito , Qixin Guo , Han Zhou , Tongxiang Fan
DOI: 10.1063/1.5001974
关键词:
摘要: Visible-light-activated near-infrared luminescent materials are promising photoluminescent due to their convenience and low cost. Crystal defects can seriously affect the performance of materials, better understanding complexity structural disorder electronic structures such opens up new possibilities in material development. In this work, we successfully design a novel, effective, visible-light-activated Gd3Ga5O12: 4.2%Yb3+, 8.4%Er3+, 4.2%Bi3+ system based on first principles. This exhibits strong emission intensity high luminous efficiency (0.993) also has lifetime (7.002 ms) that is at least twice as long longest reported published papers. We utilize density functional theory with an effective LSDA + U method study properties Gd3−x−y−zGa5O12: xYb3+, yBi3+, zEr3+ (GGG: Yb3+, Bi3+, Er3+). The d f electron orbits rare-earth ions considered for e...
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