Luminescence of Divalent Europium in Ba-Ca, Ba-Sr, and Ca-Sr Orthophosphate and Pyrophosphate Compositions

Abstract

Divalent europium was used as an activator in Ba‐Ca, Ba‐Sr, and Ca‐Sr orthophosphate and pyrophosphate compositions. Luminescence was observed in most of the compositions and spectral energy distribution measurements were made on all samples. Changes in the mixed cation ratios produced variations in emission band intensities, shifting of emission peak positions, and changes in emission band widths A new compound with the formula was found.