Valence and Local Structure Analyses of Eu and Dy Ions in Sr₂MgSi₂O₇:Eu, Dy Long Persistent Phosphorescence Phosphors Synthesized by Solid State Reaction

Mamoru Kitaura,Shinta Watanabe,Hirokazu Masai,Toshiaki Ina,Hiroyuki Setoyama,Manabu Ishizaki,Takayuki Nakanishi,Yuta Matsushima,Takashi Kunimoto,Akimasa Ohnishi

Chemistry Letters（2023）

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摘要

Valence and local structures of Eu and Dy ions in Sr2MgSi2O7:Eu, Dy long persistent phosphorescence phosphors synthesized by solid state reaction were investigated. Photo -induced valence change was observed for Eu2+ ions, but not for Dy3+ ions. The local structure of Dy3+ ions was different from those of Sr2+ and Eu2+ ions. Dy3+ ions partially aggregated, in contrast with Eu2+ ions. These facts provided an explanation to the question why no photo -induced valence change was observed for Dy3+ ions.

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dy ions,solid state reaction

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Valence and Local Structure Analyses of Eu and Dy Ions in Sr2MgSi2O7:Eu, Dy Long Persistent Phosphorescence Phosphors Synthesized by Solid State Reaction

Valence and Local Structure Analyses of Eu and Dy Ions in Sr₂MgSi₂O₇:Eu, Dy Long Persistent Phosphorescence Phosphors Synthesized by Solid State Reaction