Photoluminescence and electron-beam excitation induced cathodoluminescence properties of novel green-emitting Ba4La6O(SiO4)6:Tb3+phosphors |
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| Affiliation: | 1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics & Electronic Science, Hubei University, Wuhan 430062, People''s Republic of China;2. School of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, People’s Republic of China;3. IV. Physical Institute, Georg-August-Universität Göttingen, Göttingen 37077, Germany;1. Institute of Physical Chemistry, School of Chemistry Science & Technology, Zhanjiang Normal University, Zhanjiang 524048, China;2. MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;3. Beijing Synchrotron Radiation Facilities, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China;1. School of Physics, Shri Mata Vaishno Devi University, Katra 182320, J&K, India;2. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein ZA9300, South Africa;1. Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo, Zhejiang, 315211, China;2. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering and College of Physics, Jilin University, Changchun, Jilin, 130012, China;3. Department of Physics, Dalian Maritime University, Dalian, Liaoning, 116026, China |
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| Abstract: | Tb3+ions activated Ba4La6O(SiO4)6 (BLSO:Tb3+) phosphors were synthesized by a citrate sol-gel method. The X-ray diffraction pattern confirmed their oxyapatite structure. The field-emission scanning electron microscope image established that the BLSO:Tb3+phosphor particles were closely-packed and acquired irregular shapes. The photoluminescence (PL) excitation spectra of BLSO:Tb3+phosphors showed intense f–d transitions along with low intense peaks corresponding to the f–f transitions of Tb3+ions in the lower energy region. The PL emission spectra displayed the characteristic emission bands of Tb3+ions, and the optimized concentrations were found to be at 1 and 6 mol% for blue and green emission peaks, respectively. The cathodoluminescece (CL) spectra exhibited a similar behavior that was observed in the PL spectra except the intensity variations in the blue and green regions. The CL spectra of the BLSO:6 mol% Tb3+phosphor unveiled accelerating voltage induced luminescent properties. |
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| Keywords: | A. Sol–gel process B. X-ray diffraction C. Optical properties |
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