Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7840514 | Journal of Luminescence | 2018 | 7 Pages |
Abstract
Control of activators in solid state matter is the most important focus for phosphor applications. However, melt-quenching from an inert atmosphere is restricted by the constraints of a purged electric furnace. Here, we have examined the optical and emission properties of Ce-doped 25Al2O3â75P2O5 glass, which is the stoichiometric chemical composition of the Al(PO3)3 crystal, prepared in an air atmosphere. The decay constant (Ï1/e) and the internal quantum yield of the Ce-doped glasses depend on the Ce concentration. The Ce LIII-edge X-ray absorption near-edge structure analysis shows that the Ce3+/(Ce3+ + Ce4+) ratio increases with increasing Ce concentration, which indicates that the starting material, Ce(OCOCH3)3·H2O, affects the redox state during air melting. Although the glass was prepared in air, the Ce3+/(Ce3+ + Ce4+) ratios and the internal quantum yields of the glasses were found to be at least 65% and ~60%, respectively.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Hirokazu Masai, Kenji Shinozaki, Go Okada, Noriaki Kawaguchi, Toshiaki Ina, Takayuki Yanagida,