摘要
LaOX-Pr^(3+)(X=Cl,Br)体系在室温和液氮温度下均只观察到~3P_0能级的发射,其原因在于Pr^(3+)离子的4f5d激发态具有较高能量(>37kK),且~3P_2,~3P_1向~3P_0存在有效的电子弛豫;本文基于DSCPCF配位场模型的计算结果,对该体系的发射光谱和激发光谱进行了理论归属,实测峰位与计算值较好吻合.
The excitation and fluorescence spectra of LaOX-Pr^(3+)(X=Cl, Br) phosphors were measured at room and liquid nitrogen temperatures. The characteristics of the spectra were interpreted and most of the observed f-f transitions were assigned based on the theoretical energy levels of Pr^(3+) calculated by the Double Spher(?) Coordination Point Charge Field model. The agreement between the calculated and the observed transition wavelengths is generally good.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1991年第1期3-9,共7页
Acta Chimica Sinica
