This paper reports that the green phosphor BaAl12O19：0.1Mn^2＋ is prepared by a flux assisted solid state reaction method. The effect of flux systems on the crystal structure, morphology and luminescent properties of...This paper reports that the green phosphor BaAl12O19：0.1Mn^2＋ is prepared by a flux assisted solid state reaction method. The effect of flux systems on the crystal structure, morphology and luminescent properties of the phosphor are studied in detail. The samples are characterized by the application of x-ray diffraction patterns, scanning electron microscopy patterns, luminescent spectra and decay curves. The results show that a pure phase BaAl12O19 can be achieved at the firing temperature above 1300 ℃ by adding the proper flux system, the firing temperature is reduced at least 200℃ in comparison with the conventional solid state reaction method. Maximum photoluminescence emission intensity is observed at 517 nm for （AlF3＋Li2CO3） flux system under vacuum ultraviolet region （147 nm） excitation. The photoluminescence emission intensity and the decay time of these phosphor is found to be more superior to that of the corresponding sample prepared by the conventional solid state reaction method implying the suitability of this route for the preparation of display device worthy phosphor materials.展开更多
基金Project supported by the Combination Foundation of Industry and Research by the Ministry of Education and Guangdong Province (Grant No. 0712226100023)Doctoral Program Foundation of Institutions of Higher Education of China (Grant No. 200807300010)the National Natural Science Foundation of China (Grant No. 10874061)
文摘This paper reports that the green phosphor BaAl12O19：0.1Mn^2＋ is prepared by a flux assisted solid state reaction method. The effect of flux systems on the crystal structure, morphology and luminescent properties of the phosphor are studied in detail. The samples are characterized by the application of x-ray diffraction patterns, scanning electron microscopy patterns, luminescent spectra and decay curves. The results show that a pure phase BaAl12O19 can be achieved at the firing temperature above 1300 ℃ by adding the proper flux system, the firing temperature is reduced at least 200℃ in comparison with the conventional solid state reaction method. Maximum photoluminescence emission intensity is observed at 517 nm for （AlF3＋Li2CO3） flux system under vacuum ultraviolet region （147 nm） excitation. The photoluminescence emission intensity and the decay time of these phosphor is found to be more superior to that of the corresponding sample prepared by the conventional solid state reaction method implying the suitability of this route for the preparation of display device worthy phosphor materials.
