Red-Emitting Phosphor Ba9Lu2Si6O24:Ce3+,Mn2+ with Enhanced Energy Transfer via Self-Charge Compensation

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• 作者：Kaixin Song ; Jianxin Zhang ; Yongfu Liu ; Changhua Zhang ; Jun Jiang ; Haochuan Jiang ; Hui-Bin Qin
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：October 29, 2015
• 年：2015
• 卷：119
• 期：43
• 页码：24558-24563
• 全文大小：482K
• ISSN：1932-7455

文摘

A new red-emitting phosphor, Ce³⁺鈥揗n²⁺ codoped Ba₉Lu₂Si₆O₂₄ was synthesized by using solid-state reactions. The phase formation, luminescence properties, energy transfer mechanisms, and thermal stabilities were investigated. Under the near-ultraviolet excitation, Ba₉Lu₂Si₆O₂₄:Ce³⁺,xMn²⁺ shows a tunable emission from blue-violet to red. When x = 0.08, the photoluminescence characterized a major peak at 610 nm with an internal quantum efficiency of about 70%. The energy transfer from Ce³⁺ to Mn²⁺ was further enhanced by self-charge compensation as a result of the presence of activators at different crystallographic sites simultaneously. At 160 掳C, the quantum efficiency retained 84% of that measured at room temperature. The small thermal quenching and efficient luminescence suggest that Ba₉Lu₂Si₆O₂₄:Ce³⁺,Mn²⁺ is a promising candidate for use in ultraviolet chip pumped light-emitting diodes (LEDs).