Insight into crystal structure and Eu/Tb doped luminescence property of a new phosphate

JOURNAL OF ALLOYS AND COMPOUNDS

卷:762

Article

Zhang, J.¹  Cai, G. M.¹  Zhang, G. X.¹  Jin, Z. P.¹ 

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

关键词: Phosphate;    Mg3In4P6O24;    Crystal structure;    Luminescence properties;   

DOI  :  10.1016/j.jallcom.2018.05.079

来源: Elsevier

【 摘 要 】

Luminescent materials were of vital importance in the display, lighting, and biomedical fields. Exploration of novel inorganic host materials and groping for novel color-tunable phosphor materials with good thermal stability is still a major challenge for the quality-improvement of FLs and LEDs. In the present work, a new magnesium indium phosphate, Mg3In4P6O24 (MIP), was successfully synthesized by conventional high-temperature solid-state reaction and was structurally characterized by powder X-ray diffraction analysis, in which magnesium and indium atoms co-occupy four metal cation sites, coordinating with adjacent oxygen atoms forming distorted MO5 and MO6 polyhedra. The VUV-UV excited luminescence properties of a series of Eu3+/Tb3+ doped MIP phosphors were investigated, with the temperature-dependence of photoluminescence and relative mechanism analyzed. Under the excitation of 254 nm, the MIP: EuxTby phosphors can generate bright color-tunable green-yellow-red light by changing the doping concentration. In addition, the color of emission can also be adjusted by altering the excitation wavelength for a very phosphor, MIP:Eu0.01Tb0.05. As an interesting discovery, the plot of integrated dominant emission intensities of Eu and Tb in phosphor MIP:Eu0.01Tb0.05 versus excitation wavelength exhibits analogical profile with the excitation spectra of Eu3+/Tb3+ single-doped MIP phosphor. Moreover, the representative phosphor MIP:Eu0.01Tb0.05 shows favorable thermal stability. Present work indicates that Mg3In4P6O24 is a promising host material for the fabrication of new phosphors. (C) 2018 Elsevier B.V. All rights reserved.

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