title: Enhanced red light emission from LaBSiO5:Eu3+,R3+ (R=Bi or Sm) phosphors.
abstract: Polycrystalline LaBSiO5:Eu3+,R3+ (R=Bi or Sm) phosphors have been synthesized by a facile sol-gel method. The phosphors have been characterized by thermogravimetric analysis/different scanning calorimeter, scanning electron microscopy, X-ray diffractometer and fluorescence measurements. It was found that the emission intensity of LaBSiO5:Eu phosphors increases clearly and reaches a maximum at 30 mol% with increasing of Eu3+ concentration. The incorporation of Bi3+ ions and/or Sm3+ ions have greatly enhanced the emission intensity of Eu3+ upon excitation with 391 nm light. The possible sensitization mechanisms of Sm3+ and/or Bi3+ on Eu3+ emission intensity have been investigated and discussed. The high brightness and short luminescence decay times make it promising red-emitting candidates for white light-emitting diodes.
authors.affiliation: MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: Y N
authors.initials: YN
authors.lastname: Xue
authors.forename: F
authors.initials: F
authors.lastname: Xiao
authors.forename: Q Y
authors.initials: QY
authors.lastname: Zhang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D005063:Europium / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D012493:Samarium / Q000737:chemistry*; D013057:Spectrum Analysis; D013816:Thermodynamics; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D012493:Samarium; D005063:Europium; D007811:Lanthanum; D001729:Bismuth