The role of fluorine in high quantum yield oxyfluoride glasses and glass-ceramics

Oxyfluoride glass-ceramics is considered a great candidate for optical refrigeration. Their ability to form low-phonon fluoride crystals embedded in an oxide glass matrix presents interest the development of fluorescent efficient materials with good mechanical and thermal resistance. A better understanding material microstructure its relations on properties mandatory achieve required refrigeration values. In present work, we discuss effect compound evaporations their impacts thermal, optical, crystallization, luminescent properties. Using different melting temperatures, samples from theoretical molar composition 37.6 SiO2 – 22.4 Al2O3 19 YF3 20 LiF 1 YbF3 are fabricated by melt-quenching method. The relation between assessed measurement transition, crystallization temperature, density, refractive index, transmission. detailed study behavior conducted using scanning transmission electron microscopies, both classical temperature in-situ x-ray diffractions. Finally, measured, including quantum yield, steady-state time-resolved spectroscopies.