Luminescence enhancement of Eu²⁺, Ce³⁺ co-doped Ba₃Si₅O_13−δN_δ phosphors

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• 作者：Ruili Zhang ; Tomonori Maeda ; Ryosuke Maruta ; Sho Kusaka ; Bingjun Ding ; Kei-ichiro Murai ; Toshihiro Moriga
• 关键词：Ba₃Si₅O₁₃₋ ; δ ; N_δ ; Eu²⁺Ce³⁺ ; Co-doping ; Phosphor ; White LEDs
• 刊名：Journal of Solid State Chemistry
• 出版年：2010
• 出版时间：March 2010
• 年：2010
• 卷：183
• 期：3
• 页码：620-623
• 全文大小：420 K

文摘

Host lattice Ba₃Si₅O_13−δN_δ oxonitridosilicates have been synthesized by the traditional solid state reaction method. The lattice structure is based on layers of vertex-linked SiO₄ tetrahedrons and Ba²⁺ ions, where each Ba²⁺ ion is coordinated by eight oxygen atoms forming distorted square antiprisms. Under an excitation wavelength of 365 nm, Ba₃Si₅O_13−δN_δ:Eu²⁺ and Ba₃Si₅O_13−δN_δ:Eu²⁺,Ce³⁺ show broad emission bands from about 400–620 nm, with maxima at about 480 nm and half-peak width of around 130 nm. The emission intensity is strongly enhanced by co-doping Ce³⁺ ions into the Ba₃Si₅O_13−δN_δ:Eu²⁺ phosphor, which could be explained by energy transfer. The excitation band from the near UV to the blue light region confirms the possibility that Ba₃Si₅O_13−δN_δ:Eu²⁺, Ce³⁺ could be used as a phosphor for white LEDs.