title: Design, synthesis and luminescence properties of Ba2 YB2 O6 Cl- and Ba2 YB2 O6 F-based phosphors.
abstract: Using a high-temperature solid-state reaction, the chlorine in Ba2 YB2 O6 Cl is gradually replaced by F, and a new compound with the nominal chemical formula Ba2 YB2 O6 F and two phosphors doped with Ce(3+) and Eu(3+) , respectively, are obtained. X-Ray diffraction and photoluminescence spectroscopy are used to characterize the as-synthesized samples. The as-synthesized Ba2 YB2 O6 Cl exhibits bright blue emission in the spectral range ~ 330-410 nm with a maximum around 363 nm under X-ray or UV excitation. Ba2 YB2 O6 F:0.01Ce(3+) exhibits blue emission in the range ~ 340-570 nm with a maximum around 383 nm. Ba2 YB2 O6 F:0.01Eu(3+) exhibits a predominantly (5) D0 -(7)  F2 emission (~610 nm) and the relative intensities of the (5) D0 -(7)  F0,1,2 emissions are tunable under different wavelength UV excitation. The luminescence behaviors of the two phosphors are explained simply in terms of the host composition and site occupancy probability of Ce(3+) and Eu(3+) , respectively. The results indicate that these phosphors have potential application as a blue phosphor or as a red phosphor.
authors: Huaihua Key Laboratory of Functional Inorganic & Polymeric Materials, Department of Chemistry and Chemical Engineering, Huaihua University, HuaiHua, 418008, People's Republic China.
authors: Wanping
authors: W
authors: Chen
authors: Xin
authors: X
authors: Yang
authors: Yan
authors: Y
authors: Liu
authors: Xiaoyan
authors: X
authors: Dai
mesh_terms: D017609:Barium Compounds / Q000737:chemistry; D060326:Chemistry Techniques, Synthetic; D002713:Chlorine / Q000737:chemistry; D005063:Europium / Q000737:chemistry; D005461:Fluorine / Q000737:chemistry; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods; D017553:Phosphorus Compounds / Q000737:chemistry; D013696:Temperature; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction; D015019:Yttrium / Q000737:chemistry
chemical_list: D017609:Barium Compounds; D049408:Luminescent Agents; D017553:Phosphorus Compounds; D005461:Fluorine; D005063:Europium; D002713:Chlorine; D015019:Yttrium
keywords: haloborate; luminescence; photoluminescence; radioluminescence