Eu2+-doped Sr5(PO4)3Br blue-emitting phosphor with high color purity for near-UV-pumped white light-emitting diodes |
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| Authors: | Zhiwen Gao Shihua Liu Pengfei Sun Jung Hyun Jeong Ruijin Yu Bin Deng |
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| Affiliation: | 1. College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, China;2. College of Chemical Biological and Environmental Engineering, Xiangnan University, Chenzhou 423043, China;3. Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea |
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| Abstract: | Eu2+-doped bromophosphateapatite Sr5(PO4)3Br phosphors were synthesized by the conventional high-temperature solid-state reaction. The crystal structure and luminescence properties of the phosphors, as well as their thermal stability and CIE chromaticity coordinates were systematically investigated. Photoluminescence spectra of Sr5(PO4)3Br:Eu2+ exhibit a single blue emission at 450 nm under the excitation of 345 nm, which is ascribed to the 4f–5d transition of Eu2+. The phosphor shows very good thermal stability. The CIE color coordinates are very close to those of BaMgAl10O17:Eu2+ (BAM). All the properties indicate that the blue-emitting Sr5(PO4)3Br:Eu2+ phosphor has potential application in white LEDs. |
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| Keywords: | Bromophosphate Luminescence Rare earths |
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