摘要
Ca2BO3Cl：Ce3＋, Ca2BO3Cl：Tb3＋, and Ca2BO3Cl：Ce3＋, Tb3＋ phosphors are synthesized by a high temperature solid-state reaction. The emission intensity of Ce3＋ or Tb3＋ in Ca2BO3Cl is influenced by the Ce3＋ or Tb3＋ doping content, and the optimum concentrations of Ce3＋ and Tb3＋ are 0.03 tool and 0.05 mol, respectively. The concentration quenching effect of Ce3＋ or Tb3＋ in Ca2BO3Cl occurs, and the concentration quenching mechanism is d-d interaction for either Ce3＋ or Tb3＋. The Ca21303Cl：Ce3＋, Tb3＋ can produce colour emission from blue to green by properly tuning the relative ratio between Ce3＋ and Tb3＋, and the emission intensity of Tb3＋ in Ca2BO3Cl can be enhanced by the energy transfer from Ce3＋ to Tb3＋. The results indicate that Ca2BO3Cl：Ce3＋, Tb3＋ may be a promising double emission phosphor for UV-based white light emitting diodes.
Ca2BO3Cl：Ce3＋, Ca2BO3Cl：Tb3＋, and Ca2BO3Cl：Ce3＋, Tb3＋ phosphors are synthesized by a high temperature solid-state reaction. The emission intensity of Ce3＋ or Tb3＋ in Ca2BO3Cl is influenced by the Ce3＋ or Tb3＋ doping content, and the optimum concentrations of Ce3＋ and Tb3＋ are 0.03 tool and 0.05 mol, respectively. The concentration quenching effect of Ce3＋ or Tb3＋ in Ca2BO3Cl occurs, and the concentration quenching mechanism is d-d interaction for either Ce3＋ or Tb3＋. The Ca21303Cl：Ce3＋, Tb3＋ can produce colour emission from blue to green by properly tuning the relative ratio between Ce3＋ and Tb3＋, and the emission intensity of Tb3＋ in Ca2BO3Cl can be enhanced by the energy transfer from Ce3＋ to Tb3＋. The results indicate that Ca2BO3Cl：Ce3＋, Tb3＋ may be a promising double emission phosphor for UV-based white light emitting diodes.
基金
Project supported by the National Basic Research Program of China(Grant No.2010CB327704)
the National Natural Science Foundation for Distinguished Young Scholars of China(Grant No.60825407)
the New Century Excellent Talents in University (Grant No.NCET-10-0220)
the National Natural Science Foundation of China(Grant Nos.10974013,60978060,10804006,and 50902042)
the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20090009110027)
Beijing Municipal Natural Science Foundation,China(Grant No.1102028)
the Beijing Municipal Science & Technology Commission, China(Grant No.Z090803044009001)
the Natural Science Foundation of Hebei Province,China(Grant No.E2010000283)
the Fund from the Key Laboratory of Luminescence and Optical Information,Beijing Jiaotong University,Ministry of Education, China(Grant No.2010LOI12)
the Excellent Doctor's Science and Technology Innovation Foundation of Beijing Jiaotong University(Grant No.2011YJS073)
