This paper studies the spectral-kinetic properties of Csl:0.8·10-4 %Eu, Csl:1·10-2 %Eu and Csl:3.9·10-1 %Eu crystals. It has been found that spectrum and decay kinetics of photoluminescence depend on concentration of an activator and degree of thermal-dynamic disbalance of Csl:Eu. The emission of all the crystals decays exponentially, but each crystal differs from each other in temperature behavior of the emission decay kinetics. Possible types of the emission centers have been suggested such as single dipole Eu2+-vc -, two- and three-dipole clusters of Eu2+-vc - which are responsible for the bands with maxima at 2.69, 2.78 and 2.67 eV, respectively. Criterion for discrimination of the emission centers in Csl:Eu is the temperature behavior of their emission decay kinetics.
ASJC Scopus subject areas
- Materials Science(all)