The Quantitative Interpretation of Luminescent Properties of Cu-Activated Calcium Orthophosphate

概要

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In this paper, a fundamental equation of luminescence which can explain various luminescent properties of nonphotoconducting phosphors under excitation by ultraviolet of constant intensity at thermal equilibrium is formulated. According to this equation, various characteristics of Cu-activated β-calcium orthophosphate fired in a reducing atmosphere, such as temperature dependence of the quantum efficiency of fluorescence, thermoluminescence and stimulation or that of the quantum light-sum and fluorescent intensity, the build-up and fatigue of luminescence, the recovery from the fatigue of luminescence, and the relation between the fluorescent intensity and concentration of activators were calculated in detail by using an energy state model involving the ground, emitting, trapping and quenching states. Furthermore the detailed experimental results on the build-up of afterglow together with its theoretical results are described. A good agreement between the calculated and observed results was obtained.
社団法人日本物理学会の論文
1960-04-05