Tunable Color of Ce3+/Tb3+/Mn2+-Coactivated CaScAlSiO6 via Energy Transfer: A Single-Component Red/White-Emitting Phosphor

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• 作者：Wei L眉 ; Ning Guo ; Yongchao Jia ; Qi Zhao ; Wenzhen Lv ; Mengmeng Jiao ; Baiqi Shao ; Hongpeng You
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：March 18, 2013
• 年：2013
• 卷：52
• 期：6
• 页码：3007-3012
• 全文大小：505K
• 年卷期：v.52,no.6(March 18, 2013)
• ISSN：1520-510X

文摘

A series of single-component red/white-emitting CaScAlSiO₆:Ce³⁺,Tb³⁺,Mn²⁺ phosphors have been synthesized by a solid-state reaction. It is observed that CaScAlSiO₆:Ce³⁺,Tb³⁺ phosphors exhibit two dominating bands situated at 380 and 542 nm, originating from the allowed 5d 鈫?4f transition of the Ce³⁺ ion and the ⁵D₄ 鈫?⁷F_J = (J = 6, 5, 4, 3) transition of the Tb³⁺ ion, respectively. As for CaScAlSiO₆:Ce³⁺,Mn²⁺, our results indicate that Mn²⁺ may occupy not only a Ca²⁺ site to generate an orange emission [Mn²⁺(I)] at 590 nm but also a Sc³⁺ site to generate a red emission [Mn²⁺(II)] at 670 nm. Both energy transfers from Ce³⁺ to Tb³⁺ and from Ce³⁺ to Mn²⁺ in the CaScAlSiO₆ host are investigated and have been demonstrated to be of the resonant type via a dipole鈥揹ipole mechanism. By proper tuning of the relative composition of Tb³⁺/Mn²⁺, white light can also be achieved upon excitation of UV light, indicating that the developed phosphor may potentially be used as a single-component red/white-emitting phosphor for UV-light-emitting diodes.