title: Color tunable emission in Ce3+ and Tb3+ co-doped Ba2Ln(BO3)2Cl (Ln=Gd and Y) phosphors for white light-emitting diodes.
abstract: Ce(3+) and Tb(3+) co-doped Ba2Ln(BO3)2Cl (Ln=Y and Gd) green emitting phosphors were prepared by solid state reaction in reductive atmosphere. The emission and excitation spectra as well as luminescence decays were investigated, showing the occurrence of efficient energy transfer from Ce(3+) to Tb(3+) in this system. The phosphors exhibit both a blue emission from Ce(3+) and a green emission from Tb(3+) under near ultraviolet light excitation with 325-375 nm wavelength. Emission colors of phosphors could be tuned from deep blue through cyan to green by adjusting the Tb(3+) concentrations. The energy transfer efficiency and emission intensity of Ba2Y(BO3)2Cl:Ce(3+), Tb(3+) precede those of Ba2Gd(BO3)2Cl:Ce(3+), Tb(3+), and the sample Ba2Y(BO3)2Cl:0.03Ce(3+), 0.10Tb(3+) is the best candidate for n-UV LEDs.
authors: Institute of Photonics & Photon-Technology, National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069, China.
authors: Niumiao
authors: N
authors: Zhang
authors: Chongfeng
authors: C
authors: Guo
authors: Heng
authors: H
authors: Jing
authors: Jung Hyun
authors: JH
authors: Jeong
mesh_terms: D001464:Barium / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D003116:Color; D005682:Gadolinium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D013725:Terbium / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D013725:Terbium; D001464:Barium; D002563:Cerium; D015019:Yttrium; D005682:Gadolinium
keywords: Luminescence; Optical property; Phosphor