Study on the photoluminescence properties of a color-tunable Ca₉ZnK(PO₄)₇: Eu³⁺ phosphor

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• 作者：Ling Cao^a ; Jie Liu^b ; Zhan-Chao Wu^b ; ^{wuzhan_chao@163.com" class="auth_mail" title="E-mail the corresponding author} ; Shao-Ping Kuang^b ; ^{qustksp@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Phosphor ; Phosphate ; Energy transfer ; Color-tunable
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：127
• 期：8
• 页码：4039-4042
• 全文大小：749 K

文摘

A series of Eu³⁺-doped phosphors Ca_9(1−x)ZnK(PO₄)₇: 9xEu³⁺ (x = 0 – 0.08) have been synthesized by the high temperature solid state method. The X-ray diffraction (XRD) and photoluminescence (PL) were utilized to characterize the phosphors. The phosphors can be effectively excited by near-ultraviolet (NUV) light. The Ca₉ZnK(PO₄)₇ host exhibits broad blue emission band centered at 440 nm, while Ca₉ZnK(PO₄)₇: Eu³⁺ shows both the blue emission band and the characteristic red emission in the region of 570 – 700 nm. With increasing Eu³⁺ content, the relative emission intensity of the host at 440 nm decreased remarkably, indicating that energy transfer occurred from the Ca₉ZnK(PO₄)₇ host to Eu³⁺ ions. The phosphors show tunable color from blue to orange based on energy transfer from the host to Eu³⁺ ions.