Abstract:
The purpose of this study was to analyze the structural properties of fluoride materials mixed with cesium and to study the photoluminescence of cesium and the effect of the mixture on the photoluminescence of cesium.
Investigations were done to modify the photoluminescence (PL) spectra of a cerium doped mixed fluoride of Sr0.49M0.5Ce0.01F2(where M = Ca, Ba, Mg) materials. The x-ray diffraction analysis revealed that the Fm3m space group unchanged by substitution Sr atom by alkali earth fluorides. A noticeable shift in the x-ray diffraction patterns is observed in all ions substitution. The investigation of the photoluminescent behavior of Ce3+ in Sr0.49M0.5Ce0.01F2 showed noticeable change in the shape of the excitation and emission spectra of Ce3+. The Sr0.49Ba0.50Ce0.01F2 materail produced a significant red shift with a broad emission band. The excitation spectrum of this sample was blue shifted and therefore not suitable for solar cell application.
