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利用978 nm近红外光激发样品Ca F2∶Pb2+,Yb3+,在室温下观察到二价Pb2+离子在383 nm附近的紫外上转换发光。该发射峰对应于Pb2+离子的3P0“1A1g(1S0)跃迁。瞬态光谱测量结果表明:在这个材料体系中,Pb2+离子的激发来自于Yb3+离子三聚体的合作敏化。但是随着Pb2+离子掺杂浓度的提高,Yb3+离子三聚体遭到结构性破坏,导致其合作发光减弱。本文首次利用Pb2+离子掺杂造成Yb3+离子三聚体的结构性破坏,从而引起合作荧光猝灭,并对在Ca F2基质中因其他二价离子的掺入而造成的Yb3+三聚体合作发光猝灭给予了合理的解释。
Using 978 nm near-infrared excitation samples Ca F2: Pb2 +, Yb3 +, observed at room temperature divalent Pb2 + ions in 383 nm around the UV up-conversion luminescence. The emission peak corresponds to the 3P0 ”1A1g (1S0) transition of Pb2 + ions. The results of transient spectroscopy show that the excitation of Pb2 + ions in this material system comes from the cooperative sensitization of Yb3 + trimer, Ion doping concentration, the Yb3 + trimer was structurally destroyed, resulting in diminished cooperation of its luminescence.In this paper, the first use of Pb2 + ion doping Yb3 + ion trimers caused structural damage, resulting in cooperative fluorescence quenching and A reasonable explanation for the cooperative quenching of the Yb3 + trimer due to the incorporation of other divalent ions in the Ca F2 matrix is given.