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• W3012207206 abstract "Among the f-f transition of lanthanide ions, trivalent dysprosium (Dy 3+ ) activated luminescence materials always exhibit polychromatic emission with different ratios of blue to yellow emission (B/Y ratio), which originates from the two main transitions 4 F 9/2 to 6 H 15/2 and 6 H 13/2 , respectively. Researchers have found the B/Y ratio is dependent on the host structure. Meanwhile, Dy 3+ -activated luminescence materials have various applications under different excitations. However, the relationship between them (excitation vs emission color) has not been studied yet, which restricts the development of fundamental research and applications. In this study, we reported an excitation-controlled color variation material, the apatite oxynitride phosphor Y 5 Si 3 O 12 N: Dy 3+ and investigated the color-reversal phenomenon by switching excitation sources (from UV to VUV or cathode ray) in the material. This phenomenon is unraveled by a defect-assisted charge carrier transport model that the defect could change the chemical surrounding of Dy 3+ and result in the blue emission dominant instead of the initial yellow emission. The mechanism is evidenced by the crystal structure analysis, luminescence properties dissect, defects state parse, etc. This study also provides new insights to understand and modulate Dy 3+ -activated luminescence materials." @default.
• W3012207206 created "2020-03-23" @default.
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• W3012207206 date "2020-07-01" @default.
• W3012207206 modified "2023-10-16" @default.
• W3012207206 title "Controlling the color with different excitations in a dysprosium-activated apatite oxynitride phosphor" @default.
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• W3012207206 doi "https://doi.org/10.1016/j.ceramint.2020.03.063" @default.
• W3012207206 hasPublicationYear "2020" @default.
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