摘要
The nature of the emission center of Eu^(2+) in KCaF_3:Eu^(2+) strongly depends on the preparative condi- tions.Experimental results show that there are two different d→f transition emission bands,and the origin of these two emission bands,their interrelationship and the effect of doping concentration on them have been dis- cussed.A Eu^(2+)-Eu^(3+) valency change process has been proposed.
The nature of the emission center of Eu^(2+) in KCaF_3:Eu^(2+) strongly depends on the preparative condi- tions.Experimental results show that there are two different d→f transition emission bands,and the origin of these two emission bands,their interrelationship and the effect of doping concentration on them have been dis- cussed.A Eu^(2+)-Eu^(3+) valency change process has been proposed.
基金
the National Nutural Science Foundation of China
