Upconversion luminescence of Ca<inf>1-x</inf>Ho<inf>x</inf>F<inf>2+x</inf>and Sr<inf>0.98-x</inf>Er<inf>0.02</inf>Ho<inf>x</inf>F<inf>2.02+x</inf>powders upon excitation by an infrared laser

Abstract

© 2017 Astro Ltd. Fluorite-type Ca 1-x Ho x F 2+x and Sr 0.98-x Er 0.02 Ho x F 2.02+x powders were synthesized using the co-precipitation from water solution technique. The upconversion luminescence of Ca 1-x Ho x F 2+x and Sr 0.98-x Er 0.02 Ho x F 2.02+x powders in the visible spectral region upon excitation of 5 I 7 level Ho 3+ ions and 4 I 13/2 level Er 3+ ions were studied for the first time. The possibility of visualizing near IR laser radiation using Ca 1-x Ho x F 2+x and Sr 0.98-x Er 0.02 Ho x F 2.02+x powders is proposed. Optimal compositions of Ca 1-x Ho x F 2+x and Sr 0.98-x Er 0.02 Ho x F 2.02+x powders for application as visualizers are discussed.