Development of a single-phased Ca₃SnSi₂O₉: Bi³⁺, Dy³⁺, Eu³⁺ phosphor with tri-colors for white light-emitting diodes

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• 作者：Xue Yu ; Lei Zhang ; Xuhui Xu ; Ting Wang ; Hongling Yu ; Tingming Jiang ; Qing Jiao ; Zhengwen Yang ; Dacheng Zhou ; Jianbei Qiu
• 关键词：Photoluminescence ; Phosphor ; Light emitting diodes
• 刊名：Journal of Luminescence
• 出版年：January, 2014
• 年：2014
• 卷：145
• 期：Complete
• 页码：114-118
• 全文大小：1587 K

文摘

The bright blue emission at 420 nm, originating from the charge transfer transition of the self-activated SnO₆ octahedron, was observed in Ca₃SnSi₂O₉ host matrix. Bi³⁺, Dy³⁺ and Eu³⁺ exhibited their characteristic emission under ultraviolet excitation when these activators were doped into Ca₃SnSi₂O₉, respectively. The emission intensity located at the blue-yellow and red region of Dy³⁺ and Eu³⁺ could be further improved when Bi³⁺ was co-doped in Dy³⁺, Eu³⁺ doped Ca₃SnSi₂O₉. Furthermore, a tunable color emission, especially the white light, was realized in Ca₃SnSi₂O₉: Bi³⁺, Dy³⁺, Eu³⁺ phosphors by adjusting the relative concentration of the activators. It demonstrates that Bi³⁺, Dy³⁺, Eu³⁺ codoped Ca₃SnSi₂O₉ could potentially be used as a tricolor phosphor for the fabrication of phosphor-converted light emitting diodes (pc-LED).