Tunable-Color Luminescence via Energy Transfer in NaCa13/18Mg5/18PO4:A (A = Eu2+/Tb3+/Mn2+, Dy3+) Phosphors for Solid State

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• 作者：Kai Li ; Jian Fan ; Xiaoyun Mi ; Yang Zhang ; Hongzhou Lian ; Mengmeng Shang ; Jun Lin
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：November 17, 2014
• 年：2014
• 卷：53
• 期：22
• 页码：12141-12150
• 全文大小：790K
• ISSN：1520-510X

文摘

A series of NaCa_13/18Mg_5/18PO₄(NCMPO):A (A = Eu²⁺/Tb³⁺/Mn²⁺, Dy³⁺) phosphors have been prepared by the high-temperature solid-state reaction method. The X-ray diffraction (XRD) and Rietveld refinement, X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), cathodoluminescence (CL), decay lifetimes, and PL quantum yields (QYs) were utilized to characterize the phosphors. The pure crystalline phase of as-prepared samples has been demonstrated via XRD measurement and Rietveld refinements. XPS reveals that the Eu²⁺/Tb³⁺/Mn²⁺ can be efficiently doped into the crystal lattice. NCMPO:Eu²⁺/Tb³⁺/Mn²⁺ phosphors can be effectively excited under UV radiation, which show tunable color from purple-blue to red including white emission based on energy transfer from Eu²⁺ to Tb³⁺/Mn²⁺ ions. Under low-voltage electron beam bombardment, the NCMPO:A (A = Eu²⁺/Tb³⁺/Mn²⁺, Dy³⁺) display their, respectively, characteristic emissions with different colors, and the CL spectrum of NCMPO:0.04Tb³⁺ has the comparable intensity to the ZnO:Zn commercial product. In addition, the calculated CIE coordinate of NCMPO:0.04Tb³⁺ (0.252, 0.432) is more saturated than it (0.195, 0.417). These results reveal that NCMPO:A (A = Eu²⁺/Tb³⁺/Mn²⁺, Dy³⁺) may be potential candidate phosphors for WLEDs and FEDs.