Luminescence and energy transfer of white-light emitting CaAl2SiO6:Ce3+, Tb3+ phosphors |
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| Authors: | Baoling Wang Liuzheng Sun Haidong Ju |
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| Affiliation: | 1. Department of Chemistry, Kunming University, Kunming 650031, China;2. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;1. School of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, PR China;2. School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, PR China;1. Department of Chemistry, M. S. Ramaiah Institute of Technology, Bangalore 560 054, India;2. Visvesvaraya Technological University, Belgaum 590 018, India;3. Department of Ceramics and Cement Technology, PDA College of Engineering, Gulbarga 585102, India;4. Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India;5. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India;6. Interdisciplinary Program, Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Madras, Chennai 600 036, India |
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| Abstract: | A novel white-light emitting CaAl2SiO6: Ce3+, Tb3+ phosphor has been prepared by a sol–gel method. X-ray diffractometry and spectrofluorometry were used to characterize structural and optical properties of the samples. The results indicate that the crystal structure of the phosphor is a single phase of CaAl2SiO6. The excitation band of the phosphor covers a wide region from 240 nm to 380 nm. CaAl2SiO6: Ce3+, Tb3+ phosphors show four emission bands: one at 400 nm for Ce3+ and three at 487 nm, 543 nm and 585 nm for Tb3+. With appropriate tuning of Tb3+ content, white light with different hues can be achieved under UV radiation. The energy transfer mechanism from Ce3+ to Tb3+ in CaAl2SiO6 host was demonstrated to be dipole–dipole interaction. |
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