Broadband Yellowish-Green Emitting Ba4Gd3Na3(PO4)6F2:Eu2+ Phosphor: Structure Refinement, Energy Transfer, and Thermal Stability

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• 作者：Xiaopeng Fu ; Wei Lü ; Mengmeng Jiao ; Hongpeng You
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：June 20, 2016
• 年：2016
• 卷：55
• 期：12
• 页码：6107-6113
• 全文大小：546K
• 年卷期：0
• ISSN：1520-510X

文摘

A series of Ba₄Gd₃Na₃(PO₄)₆F₂:Eu²⁺ phosphors with a broad emitting band have been synthesized by a traditional solid state reaction. The crystal structural and photoluminescence properties of Ba₄Gd₃Na₃(PO₄)₆F₂:Eu²⁺ are investigated. The different crystallographic sites of Eu²⁺ in Ba₄Gd₃Na₃(PO₄)₆F₂:Eu²⁺ phosphors have been verified by means of their photoluminescence (PL) properties and decay times. Energy transfer between Eu²⁺ ions, analyzed by excitation, emission, and PL decay behavior, has been indicated to be a dipole–dipole mechanism. Moreover, the luminescence quantum yield as well as the thermal stability of the Ba₄Gd₃Na₃(PO₄)₆F₂:Eu²⁺ phosphor have been investigated systematically. The as-prepared Ba₄Gd₃Na₃(PO₄)₆F₂:Eu²⁺ phosphor can act as a promising candidate for n-UV convertible white LEDs.