The effect of calcium substitution on the afterglow of Eu2+/Dy3+ doped Sr4Al14O25 |
| |
Authors: | Danuta Dacyl Dominik Uhlich Thomas Jüstel |
| |
Institution: | (1) FB Chemieingenieurwesen, University of Applied Sciences Münster, D-48565 Steinfurt, Germany |
| |
Abstract: | The effect of calcium substitution on the afterglow of tetrastrontium aluminate phosphors (Sr4Al14O25:Eu2+, Dy3+) was investigated. A series of (Sr1-xCax)O⊎nAl2O3:Eu2+(1%), Dy3+(0.5%), with variation of calcium content (x = 0 − 1), were synthesized by a high temperature solid state reaction in a reducing
atmosphere. The photoluminescence, persistent luminescence (afterglow), and lumen equivalents of these materials were studied
and compared. It turned out that the afterglow properties of the phosphors were strongly dependent on the Sr/Ca ratio. As
the Ca content increased, a phase transition and blue shift in emission spectra were observed.
![MediaObjects/11532_2009_17_Fig1_HTML.jpg](/content/n38582x654782t04/MediaObjects/11532_2009_17_Fig1_HTML.jpg) |
| |
Keywords: | Afterglow Tetra strontium aluminate Europium Dysprosium Photoluminescence spectra Phase transition |
本文献已被 SpringerLink 等数据库收录! |
|