title: Optical characterization and the energy level scheme for Ce3+-doped BaY2Si3O10blue-emitting phosphor.
abstract: A series of Ce3+-activated blue-emitting phosphors BaY2Si3O10(BYSO) was designed and synthesized by a conventional solid-state method. Upon ultraviolet light (250-370 nm) excitation, the obtained phosphors showed an intense blue emission band centered at 400-427 nm depending on doping concentration, and corresponding to the 5d→4f transition of Ce3+. The effects of doping concentration on crystal structure, emitting color, photoluminescence and photoluminescence excitation spectra, as well as the concentration quenching mechanism were studied in detail. The optimal doping concentration of Ce3+in this phosphor was demonstrated to be about 0.75% and the concentration quenching mechanism can be ascribed to electric dipole-dipole interactions with a critical distance of ~38 Å. These fine luminescence properties indicate that BYSO:Ce3+may be a potential blue phosphor for full-color ultra-violet (UV) white light emitting diodes (WLEDs).
authors.affiliation: Research and Development Department, Guangzhou LEDteen Optoelectronics Co., Ltd, Guangzhou, 510663, China.
authors.forename: Jianqing
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
authors.forename: Weiren
authors.initials: W
authors.lastname: Zhao
mesh_terms: D001464:Barium / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D003116:Color; D049408:Luminescent Agents / Q000737:chemistry*; D055620:Optical Phenomena; D010100:Oxygen / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D014466:Ultraviolet Rays; D015019:Yttrium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D001464:Barium; D002563:Cerium; D015019:Yttrium; D010100:Oxygen; D012825:Silicon
keywords: BaY2Si3O10; Ce3+; stokes shift; blue phosphor; luminescence