標題: | Effect of host compositions on the afterglow properties of phosphorescent strontium aluminate phosphors derived from the sol-gel method |
作者: | Chen, IC Chen, TM 應用化學系 Department of Applied Chemistry |
公開日期: | 1-May-2001 |
摘要: | The effect of compositions of host precursors on the afterglow and phosphorescent decay properties of Eu2+- and Dy3+-coactivated strontium aluminates (SAED) synthesized by a sol-gel process has been investigated. A variety of strontium aluminates such as Sr3Al2O6, SrAl2O4, and SrAl12O19 have been identified in the samples prepared from starting precursors with Al/Sr ratios ranging from 1 to 12, respectively. The initial afterglow intensity (I-0) for SAED phases was found to vary with Al/Sr ratio of the sol-gel precursor, with a maximal I-0 appearing in the sample with Al/Sr of 2 in which SrAl2O4 dominated. The afterglow decay rate was found to be fastest for sample with Al/Sr ratio of 1:1 in which Sr3Al2O6 phase dominated. Moreover, the afterglow decay rates for those with Al/Sr ratio of 2:1 to 12:1, in which SrAl2O4 and SrAl12O19 dominated, were found to be slow and similar. |
URI: | http://hdl.handle.net/11536/29683 |
ISSN: | 0884-2914 |
期刊: | JOURNAL OF MATERIALS RESEARCH |
Volume: | 16 |
Issue: | 5 |
起始頁: | 1293 |
結束頁: | 1300 |
Appears in Collections: | Articles |
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