Structure and novel optical characteristics of SrSi2O 2N2:Ce3+/Tb3+ oxynitride phosphors
Journal
Journal of the American Ceramic Society
Journal Volume
94
Journal Issue
10
Pages
3256-3260
Date Issued
2011
Author(s)
Abstract
A microwave-assisted hydrothermal route was developed for preparing (Sr1-x-yCexTby)Si2O 2-£_N2+£g phosphors. Both the required calcination temperatures and heating duration were markedly reduced as compared with the solid-state reaction. With a rise in the calcination temperatures, the emission intensity of Ce3+-doped phosphors decreased due to the thermal quenching effects. For Tb3+-doped phosphors, the emission intensities of the splitting peaks were influenced by the thermal interaction between the Tb3+ energy levels. It is found that the Ce3+- and Tb 3+-doped SrSi2O2N2 phosphors demonstrate great absorption in the vacuum ultraviolet region and are therefore suitable for application in plasma display panels. While Ce3+ and Tb3+ were codoped into SrSi2O2N2, the emission spectra exhibited the combination of the Ce3+ and Tb3+ emission peaks. The energy transfer process from Tb3+ to Ce3+ via the electrostatic interaction was also investigated in detail. ? 2011 The American Ceramic Society.
SDGs
Type
journal article