期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 6, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3086624
关键词
charge transfer states; combustion; doping profiles; electron diffraction; europium compounds; materials preparation; nanostructured materials; nanotechnology; phosphors; photoluminescence; radiation quenching; red shift; scanning electron microscopy; spectral line intensity; transmission electron microscopy; X-ray chemical analysis; X-ray diffraction; yttrium compounds
资金
- MOST of China [2006CB601104]
- Foundation of International Joint Research of Beijing [2007N08]
- Natural Science Foundation of Beijing [2073023]
- Doctoral Starting Foundation of Jiangxi University of Science and Technology
Ultrafine Y2O3:Eu3+ phosphors were prepared by a modified solution combustion method. The as-prepared samples with sizes of 17.6-80 nm (nanophosphors) and 300 nm (submicron phosphors) were characterized by x-ray diffraction, transmission electron microscope, scanning electron microscopy, selected area electron diffraction, and energy dispersive x-ray spectroscopy. The emission spectra of the samples are unchanged in comparison with that of standard material. The excitation spectra show a redshift in the charge-transfer-state band and a blueshift in the host gap band. In relation to commercial sample, the relative luminescence intensities of nano- and submicron phosphors are increased sufficiently to 64.4% and 93.6%, respectively. Higher quenching concentration of the activator Eu3+ ion was observed in the nanophosphor than that in the phosphor synthesized by solid state reaction.
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