Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8001145 | Journal of Alloys and Compounds | 2014 | 6 Pages |
Abstract
A series of Si3N4 doping Y2.9Ce0.1Al5âxSixO12â3x/2N4x/3 phosphors were prepared by solid-state reaction in 95%N2-5%H2 reduced air ambience. The XRD characteristics plus Rietveld refinement results shows that the as-sintered powders are unique crystal phase with the same crystal structure of Y3Al5O12 (PDF No. 79-1891). The N element was not detected by the analysis of X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectrum (EDS). The photoluminescence spectra (PL & PLE) tests show that the exciting and emitting intensity of PLE & PL gradually increase due to the increase of Si3N4 concentration. Meanwhile, the phosphorescence decay times are prolonged from 45 ns (x = 0) to 78 ns (x = 0.3), under the monitor of 530 nm wavelength. The thermoluminescence tests (TL) confirm the thermal stability of as-phosphors with Si3N4 addition is much better than that of the pristine Y2.9Ce0.1Al5O12 phosphors.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Fangfang Zhang, Kaixin Song, Jun Jiang, Song Wu, Peng Zheng, Qingming Huang, Junming Xu, Huibin Qin,