| Thermal degradation of BaAl2Si2O8：Eu2＋ phosphor excited by near ultraviolet light |
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| 作者姓名： | MA MingXing ZHU DaChuan ZHAO Cong HAN Tao CAO ShiXiu LEI Yu TU MingJing |
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| 作者单位： | [1]College of Material Science and Engineering, Sichuan University, Chengdu 610065, China [2]Research Center for Material Interdisciplinary Science, Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology, Chongqing University of Arts and Science, Chongqing 402160, China |
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| 基金项目： | This work was supported by the Scientific and Technological Project of Chongqing, China （CSTC, 2009AB4171）, and the Innovation Foundation for Technology Based Firms of the Ministry of Science and Technology, China （04C26225100807）. |
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| 摘 要： | Eu2+ doped BaAl2Si2O8 phosphor was synthesized by one-step calcination of precursors that were prepared by chemical co-precipitation.The thermal degradation properties of BaAl2Si2O8:Eu2+ were investigated by photoluminescence,lifetime and chromaticity coordinate measurements.BaAl2Si2O8:Eu2+ is efficiently excited by incident light of 250-400 nm,which matches the emission of near ultraviolet LED chips well.BaAl2Si2O8:Eu2+ exhibits broad blue emission at 470 nm because of the 4f65d1-4f7(8S7/2) transition of Eu2+ ions,and the emission band shows an unusual blue shift with bandwidth broadening and emission intensity decreasing as the annealing temperature is increased.The luminescence decay and CIE chromaticity coordinates of BaAl2Si2O8:Eu2+ were determined to investigate its application in white LEDs.
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| 关 键 词： | thermal degradation luminescence aluminosilicate phosphor |
Thermal degradation of BaAl2Si2O8:Eu2+ phosphor excited by near ultraviolet light |
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| MA MingXing,ZHU DaChuan,ZHAO Cong,HAN Tao,CAO ShiXiu,LEI Yu,TU MingJing.Thermal degradation of BaAl2Si2O8:Eu2+ phosphor excited by near ultraviolet light[J].Chinese Science Bulletin,2012,57(14):1728-1732. |
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| Authors: | MingXing Ma DaChuan Zhu Cong Zhao Tao Han ShiXiu Cao Yu Lei and MingJing Tu |
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| Institution: | Key Laboratory of Micro/Nano Materials Engineering and Technology,Chongqing University of Arts and Science,Chongqing 402160,China |
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| Abstract: | Eu2+doped BaAl2Si2O8 phosphor was synthesized by one-step calcination of precursors that were prepared by chemical co-precipitation. The thermal
degradation properties of BaAl2Si2O8:Eu2+ were investigated by photoluminescence, lifetime and chromaticity coordinate measurements. BaAl2Si2O8:Eu2+ is efficiently excited by incident light of 250–400 nm, which matches the emission of near ultraviolet LED chips well. BaAl2Si2O8:Eu2+ exhibits broad blue emission at 470 nm because of the 4f65d1-4f7 (8S7/2) transition of Eu2+ ions, and the emission band shows an unusual blue shift with bandwidth broadening and emission intensity decreasing as the
annealing temperature is increased. The luminescence decay and CIE chromaticity coordinates of BaAl2Si2O8:Eu2+ were determined to investigate its application in white LEDs. |
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| Keywords: | thermal degradation luminescence aluminosilicate phosphor |
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