Investigation on luminescence properties of emission-tunable Ba₉Y₂Si₆O₂₄:Tb³⁺, Mn²⁺ phosphors

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• 作者：Songsong An^a ; Jia Zhang^b ; ^{zhangjianew@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Phosphors ; LEDs ; Tunable-emission
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：42
• 期：2
• 页码：3437-3441
• 全文大小：1402 K

文摘

A series of emission-tunable Ba₉Y₂Si₆O₂₄:Tb³⁺, Mn²⁺ (BYS:Tb³⁺, Mn²⁺) phosphors were prepared by a solid-state reaction method, and their luminescence properties upon ultraviolet light excitation were studied. The characteristic ⁵D₄–⁷F_J emissions of Tb³⁺ are observed in BYS:0.6Tb³⁺ upon 300 nm excitation. By codoping Tb³⁺–Mn²⁺ into the BYS host, tunable emission is realized in BYS:0.6Tb³⁺, yMn²⁺ (0≤y≤0.5), ranging from yellowish green to orange. The energy transfer (ET) from Tb³⁺ to Mn²⁺ is verified by the decay curves and the ET efficiencies are valuated from the changing decay lifetimes. By further adjusting the relative concentrations of Tb³⁺ and Mn²⁺, nearly white light is obtained finally in the BYS:0.05Tb³⁺, 0.1Mn²⁺ sample. The above investigations indicate the as-prepared BYS:Tb³⁺, Mn²⁺ phosphors could have potential applications in UV-LEDs.