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 t...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.展开更多
基金the National Nutural Science Foundation of China
文摘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.
