Effect of boron on processing and phosphorescence behavior of SrAl4O7 (SA2) co-doped with Eu2+ and Dy3+
Eskin, Murat Gökhan and Kurt, Hasan and Gülgün, Mehmet Ali and Ow-Yang, Cleva W. (2011) Effect of boron on processing and phosphorescence behavior of SrAl4O7 (SA2) co-doped with Eu2+ and Dy3+. In: Materials Research Society Fall 2010 Meeting, Boston, Massachusetts, USA
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SrAl4O7 (SA2) phosphor powders were synthesized by using a modified Pechini process. Varying amounts of boron was incorporated into the SA2 lattice to investigate the effects on crystal structure and optical properties. X-ray spectra showed that boron addition enhances phase purity of the powder at a calcination temperature of 1000 °C, whereas the formation of a new S4A7 phase was induced when a calcination temperature of 1100 °C was used. The afterglow duration was extended to longer than 5 hours when boron was present in 4-11 mol%. To elucidate the enhanced optical properties, interband trap characteristics were characterized by thermoluminescence and photoluminescence
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