Effects of Ce concentrations, annealing conditions and fabrication processes on the photoluminescence properties of Ce‐doped silica films

Abstract

Ce-doped silica films with various Ce concentrations were prepared via ion beam sputtering (IBS) and ion implantation. The samples containing 1.46 at.% Ce were annealed at various temperatures from 500 to 1100 8C in air ambient and a separate sample with the same Ce concentration was annealed at 1100 8C in nitrogen gas. The Ce-related photoluminescence (PL) was observed for the samples and found to be sensitive to the Ce concentrations, annealing conditions and fabricating processes. The PL intensity increases with increasing Ce concentrations from 0.09 to 0.58 at.%, and the concentration-induced quenching effect occurred as the Ce concentrations reached 1.46 at.%. Also, the PL intensity is enhanced as the samples were annealed at various temperatures from 500 to 900 8C in air ambient, then decreases remarkably as the annealing temperature reached 1100 8C. In addition, compared with the sample annealed in air, the PL intensity can be enhanced for the sample annealed in nitrogen gas. Distinctive PL spectra were found for the samples prepared via different processes.

CIE color coordinates for the design of luminescent glass materials

“…The samples with 0 and 2% Eu 2 O 3 containing different CeO 2 concentrations (1% and 2%) at 450 nm have almost the same PL intensity, suggesting Ce 3+ can act as a self‐quencher. One possible explanation is the concentration quenching due to the aggregation of cerium and as a result, part of the Ce 3+ ions are self‐quenched by nearby Ce 3+ ions 31,53–55 . Therefore very high concentrations of Ce 3+ suppress the blue luminescence.…”

“…One possible explanation is the concentration quenching due to the aggregation of cerium and as a result, part of the Ce 3+ ions are selfquenched by nearby Ce 3+ ions. 31,[53][54][55] Therefore very high concentrations of Ce 3+ suppress the blue luminescence. In this soda-lime silicate binary system, Ce 3+ influences the Eu 3+ PL, enhancing the red luminescence.…”