Structure and White Luminescence of Eu-Activated (Ba,Sr)13−xAl22−2xSi10+2xO66 Materials

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• 作者：Gr&#xe9 ; goire Denis ; Philippe Deniard ; Eric Gautron ; Fr&#xe9 ; d&#xe9 ; ric Clabau ; Alain Garcia ; St&#xe9 ; phane Jobic
• 刊名：Inorganic Chemistry
• 出版年：2008
• 出版时间：May 19, 2008
• 年：2008
• 卷：47
• 期：10
• 页码：4226 - 4235
• 全文大小：1762K
• 年卷期：v.47,no.10(May 19, 2008)
• ISSN：1520-510X

文摘

The optical properties of Eu-activated (Ba,Sr)_13−xAl_22−2xSi_10+2xO₆₆ materials have been determined after the structural reinvestigation of the hypothetical Ba₁₃Al₂₂Si₁₀O₆₆ material on the basis of the Gebert’s model. The white fluorescence and phosphorescence of the (Ba,Sr)_13−xAl_22−2xSi_10+2xO₆₆:Eu series result from the existence of two broad emission bands associated with ⁸H-4f⁶5d¹ → ⁸S-4f⁷ transitions peaking at 534 and 438 nm, the intensities of which may be tuned at room temperature via the control of the europium concentration and the substitution of Sr for Ba. This suggests the possibility to adjust the emission of the material to white LED requisites.