Rare-earth-free white emitting Ba2TiP2O9 phosphor: revealing its crystal structure and photoluminescence properties.

A high intensity bluish-white emitting Ba2TiP2O9 phosphor was synthesized by a conventional solid-state reaction method and the precise crystal structure was investigated for the first time by Rietveld refinement analysis. Ba2TiP2O9 has a monoclinic crystal structure with a space group C2/c (no. 15), which is built out of PO4 tetrahedra and TiO5 pyramidal polyhedra connected to form a chain structure along the c-axis. The emission of Ba2TiP2O9 is due to a charge transfer transition between Ti(4+)-O(2-) in the pyramidal TiO5. The obtained Ba2TiP2O9 was excited efficiently by UV and VUV and displayed a bright bluish-white luminescence.

[1]  Quansheng Wu,et al.  A novel self-activated white-light-emitting phosphor of Na2TiSiO5 with two Ti sites of TiO5 and TiO6 , 2016 .

[2]  H. Seo,et al.  A high efficient Ba2TiP2O9 phosphor for X-ray and UV excitation , 2013 .

[3]  Fujio Izumi,et al.  VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data , 2011 .

[4]  K. Miura,et al.  Blue long-lasting phosphorescence of Ti-doped BaZrO3 perovskites , 2009 .

[5]  K. Soga,et al.  Origin of photoluminescence in suzukiite-type BaTiSi2O7 , 2008 .

[6]  F. Izumi,et al.  Three-Dimensional Visualization in Powder Diffraction , 2007 .

[7]  S. Inoue,et al.  Visible orange photoluminescence in a barium titanosilicate BaTiSi2O7 , 2006 .

[8]  M. Takano,et al.  Blue-light emission at room temperature from Ar+-irradiated SrTiO3 , 2005 .

[9]  T. Komatsu,et al.  Second-order optical nonlinear and luminescent properties of Ba2TiSi2O8 nanocrystallized glass , 2005 .

[10]  G. Waychunas,et al.  The nature of blue luminescence from natural benitoite BaTiSi3O9 , 2004 .

[11]  G. Blasse.  Classical phosphors: A Pandora's box , 1997 .

[12]  H. Mueller‐Buschbaum,et al.  Synthese und Struktureines Strontium-Vanadyl-Phosphats: Sr2(VO)(PO4)2 / Synthesis and Structure of a Strontium Vanadyl Phosphate: Sr2(VO)(PO4)2 , 1996 .

[13]  E. M. Holt,et al.  σ-Dibarium Pyrophosphate , 1995 .

[14]  G. Blasse,et al.  Dependence of luminescence of titanates on their crystal structure , 1995 .

[15]  J. Toofan.  A Simple Expression between Critical Radius Ratio and Coordination Number , 1994 .

[16]  Eloise H. Evans,et al.  Standard X-Ray Diffraction Powder Patterns from The JCPDS Research Associateship , 1987, Powder Diffraction.

[17]  P. Moulton.  Spectroscopic and laser characteristics of Ti:Al2O3 , 1986 .

[18]  L. D. Haart,et al.  On the photoluminescence of semiconducting titanates applied in photoelectrochemical cells , 1985 .

[19]  I. D. Brown,et al.  Bond‐valence parameters obtained from a systematic analysis of the Inorganic Crystal Structure Database , 1985 .

[20]  G. Blasse.  The luminescence of closed-shell transition-metal complexes. New developments , 1980 .

[21]  G. Blasse,et al.  The luminescence of barium titanium phosphate, BaTi(PO4)2 , 1979 .

[22]  J. Bovin,et al.  Sodium titanium silicate, Na2TiSiO5 , 1978 .

[23]  A. Macke.  Investigations on the luminescence of titanium-activated stannates and zirconates , 1976 .

[24]  R. Grasser,et al.  Luminescent sites in CaWO4 and CaWO4 : Pb crystals , 1976 .

[25]  R. Powell,et al.  Luminescence of calcium tungstate crystals , 1974 .

[26]  G. Blasse,et al.  Low‐temperature photoluminescence of strontium and barium tungstate , 1974 .

[27]  W. Tiller,et al.  Study of the Growth Mechanism and Twin Habits of Ba2TiP2O9 , 1962 .

[28]  G. Shirane,et al.  Crystal Growth and Structural Study of the Barium‐Titanium‐Phosphate Phosphor , 1961 .

[29]  D. E. Harrison.  The System BaO ‐ TiO2 ‐ P 2 O 5: Phase Relations, Fluorescence, and Phosphor Preparation , 1960 .

[30]  Linus Pauling,et al.  The Nature of the Chemical Bond and the Structure of Molecules and Crystals , 1941, Nature.

[31]  S. T. Henderson,et al.  Barium Titanium Phosphate: A New Phosphor , 1951 .