Optical properties of Eu-activated calcium aluminosilicates synthesized in different atmospheres |
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| Authors: | Xue YuXuhui Xu Penghui YangQing Jiao Zhengwen YangZhiguo Song Jianbei Qiu |
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| Affiliation: | a Key Laboratory of Advanced Materials of Yunnan Province, College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, PR China
b Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, PR China |
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| Abstract: | The optical properties of Eu-activated CaAl2Si2O8 appear to be totally dependent on the atmosphere during the synthesis processing. Compared with oxidizing/reducing-sintered samples, a significant enhancement in both the photoluminescence and afterglow for the vacuum-sintered sample is observed. The deficiency of energy transfer among the different emission centers is the prevailing contribution to the highest photoluminescence intensity of the vacuum-sintered sample. A distinction in afterglow characteristics of CaAl2Si2O8:Eu prepared in different atmosphere is suggested to be mainly due to the distribution of different trap depths at three types of emission centers. |
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| Keywords: | Photoluminescence Thermoluminescence Energy transfer Self-reduction |
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