摘要
通过测量~5D_0→~7F_2发射带的荧光寿命与晶体温度的依赖关系,研究了Eu^(3+)激发态~5D_0的无辐射跃迁.结果表明,~5D_0→~7F_2带的温度淬灭效应主要是由于电荷转移态的最低能量太低,~5D_0态易被热激活至电荷转移,然后通过电荷转移无辐射弛豫至~7F_2态.
In this paper, the radiationless transition of the excited state 5D0 of Eu3+ in SBN crystal has been studied by observing the temperature dependence of the fluorescence lifetime of 5A0→7F2 emission band. The temperature quenching effect of 5D0→7F2 band is mainly due to that the minmum energy of the charge-tranfer state (CTS) of Eu3+ is so low that 5D0 state can be activated thermally to CTS and then transfers to 7F state via CTS with radiationless transition.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1993年第12期1073-1077,共5页
Acta Optica Sinica
基金
国家自然科学基金
关键词
SBN晶体
无辐射跃迁
激发态
铕离子
SBN crystal, charge-transfer state, radiationless transition.