title: Preparation, structure and luminescent properties of Eu3+ doped MBPO5 (M = Ca, Sr, Ba) red phosphor for white LED.
abstract: BACKGROUND
  A suite of MBPO5 (borophosphates-BPO):Eu3+ (M = Ca, Sr, Ba) red emitting phosphors were synthesized and their luminescent properties were studied by excitation and emission spectra.
  
  
  RESULTS
  The energy gap of CBPO, SBPO and BBPO are 5.481, 5.498 and 5.604 eV, respectively. While, these samples showed similar total and partial densities of states. The x-ray powder diffraction (XRD) patterns indicated that the samples were simple MPBO5 phase. According to the absorption spectra, the band gap energies of CBPO:Eu3+, SBPO: Eu3+ and BBPO:Eu3+ were calculated to be 5.499, 5.516 and 5.659 eV, respectively. The spectra of all three MBPO5:Eu3+ samples were similar with main excitation and emission peaks at 394 nm and 594 nm, respectively. The concentration quenching did not appear with the increase of the concentration of Eu3+. The charge compensator can improve the emission intensity. The average decay time of CBPO:0.05Eu3+, SBPO:0.05Eu3+ and BBPO:0.05Eu3+ was 3.29, 2.54, and 3.15 ms, respectively. The above results suggested that this phosphor was qualified as red phosphor, which could be used as a near UV-based white LED.
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Zhiren
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Xu
authors.initials: X
authors.lastname: Li
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Dong
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Dian
authors.initials: D
authors.lastname: Jiao
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Guan
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Guoyi
authors.initials: G
authors.lastname: Dong
authors.affiliation: Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding - PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Teng
mesh_terms: D001896:Boron Compounds / Q000138:chemical synthesis / Q000737:chemistry; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry; D010710:Phosphates / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D001896:Boron Compounds; D049408:Luminescent Agents; D010710:Phosphates; D005063:Europium