Effect of Sr2+-doping on structure and luminescence properties of BaAl2Si2O8:Eu2+ phosphors |
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| Authors: | Mingxing Ma Dachuan Zhu Cong Zhao Tao Han Shixiu Cao Mingjing Tu |
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| Institution: | 1. College of Material Science and Engineering, Sichuan University, Chengdu 610065, China;2. College of Chemistry and Environmental Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China;1. Marmara University, Faculty of Engineering, Department of Metallurgical and Materials Science Engineering, ?stanbul 34722, Turkey;2. Bartin University, Faculty of Engineering, Department of Environmental Engineering, Bartin 74100, Turkey;1. GE Global Research, One Research Circle, Niskayuna, NY 12309, United States;2. University of Albany, 1400 Washington Avenue, Albany, NY 12222, United States;3. Institute of Physics, University of Tartu, Ravila 14C, Tartu 50411, Estonia |
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| Abstract: | Sr2+ doped BaAl2Si2O8:Eu2+ phosphor was synthesized by chemical co-precipitation method. With the increase of Sr2+ concentration, the phase structure of (Ba0.965 ? xSrxEu0.035)Al2Si2O8 changes from hexagonal phase to monoclinic phase owing to large activation energy in SrAl2Si2O8 system. (Ba0.965 ? xSrxEu0.035)Al2Si2O8 phosphor exhibits a broad blue band peaking at 425 nm due to the 4f65d–4f7(8S7/2) transition of Eu2+ ions. The emission intensity increases, accompanied by the blue shift of emission maximum from 459 to 417 nm with the Sr2+ doping concentration increasing. The optimal concentration of Sr2+ ion is 40%, and the phosphor shows high color stability in CIE chromaticity diagram. The result indicates that Sr2+ doped phosphor not only can enhance the relative intensity but also can adjust the chromaticity coordinate. |
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