摘要
研究了Ｃａ３Ｌａ３（Ｂｏ３）５中Ｄｙ３＋的光致发光，Ｃｅ３＋或Ｂｉ３＋对Ｄｙ３＋发光的敏化作用，Ｄｙ３＋自身浓度猝灭和Ｃｅ３＋→Ｄｙ３＋能量传递的机理。
in this paper, the photoluminescence of Dy3+ mon-doped or Ce3+(Bi3+) and Dy3+codoped Ca3La3 (BO3)5 samples and the dependence of Dy3+and Ce3+ luminescent intensities on compositions excited by UV light have been studied. The results obtained indicate that both Ce3+ and Bi3+ can sensitize the liminescence of Dy3+, but the sensitization of Ce3+is much stronger that of Bi3+. The mechanism of the energy transfer from Ce3+ to Dy3+ has been studied too and it is concluded lobe a resonant transfer of electric dipole-dipole interaction. According to the dependence of the luminescent intensities on the concentration of Dy3+ in Ca3La3 (BO3)5: Dy3+ under the excitation of 351nm, it has been confirmed that the mechanism of concentration selfquenching of Dy3+ is an eletric dipole-quadrupole interaction.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1994年第6期15-20,共6页
Spectroscopy and Spectral Analysis
基金
稀土材料化学及应用国家开放实验室资助
关键词
镝
铈
铋
硼酸盐
光致发光
深度猝灭
Ca_3La_3 (BO_3)_5, Dy￣(3+), Ce￣(3+), Bi￣(3+), Photoluminescence, Concentration selfquenching, Energy transfer
