Effect of Tb3+ ion concentration on the up-conversion and down-conversion luminescence properties of the Yb3+/Ho3+/Tb3+ tri-doped SiO2–Al2O3–Y2O3–NaF–CaF2 glasses

Abstract

Yb 3+ -Ho 3+ -Tb 3+ co-doped SiO 2 –Al 2 O 3 –Y 2 O 3 –NaF–CaF 2 glasses were prepared. The XRD of the glass was obtained, which proved the amorphous state of the glass. The crystallization temperature of glass was measured by differential scanning calorimetry, and the crystallization activation energy was obtained. The absorption spectrum of glass was investigated. The network structure of glass was studied. The up-conversion and down-conversion spectra of the glass were obtained under 980 nm and 369 nm excitation, respectively, and the fluorescence decay lifetime of Tb 3+ : 5 D 4 was measured. The influence of laser power on up-conversion luminescence intensity was investigated by changing the laser power. The energy transfer relationship among Yb 3+ , Ho 3+ , and Tb 3+ was researched. The CIE chromaticity coordinate was calculated according to the emission spectrum. It shows that this series of glasses have possible applications in the field of the green light display. • Yb 3+ -Ho 3+ -Tb 3+ tri-doped SiO 2 –Al 2 O 3 –Y 2 O 3 –NaF–CaF 2 glass was prepared. • Intensity of the up-conversion and down-conversion emission peaks was dominated by Tb 3+ ions. • Energy level transitions and energy transfer modes between Yb 3+ -Ho 3+ -Tb 3+ ions were discussed. • This series of glass has potential applications in the field of green light display elements.