ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
We have demonstrated the synthesis of lanthanide co-doped nominally SrAl2O4powders that phosphoresce over long durations. Previous work has reported that the color ofphosphorescence depends on the nature of the alkaline earth cation, and that extendedphosphorescence in Eu2+ and other lanthanide co-doped MAl2O4 (M= Sr, Ca, Ba) systemsoccurred with boron incorporation. To gain further insight into the mechanism of extendedphosphorescence persistence, we investigated the incorporation of other glass-formingcations, Si and P. The Eu2+ and Dy3+ co-doped SrAl2O4 (SAED) powders were processed bysolution polymerization and annealed at 1000oC under a reducing atmosphere. X-raydiffraction spectra revealed that these powders were multiphase. To characterize the opticalproperties, photoluminescence spectra and phosphorescence persistence curves weremeasured using a 325-nm wavelength excitation source. We report that the addition of B2O3alone to SAED powders extended the persistence, while decreasing the luminosity, but moreinterestingly, the addition of B2O3 along with other glass formers dramatically increased theexcitation luminosity
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.2627.pdf
Permalink