Photoluminescence and energy storage traps in CaTiO3:Pr3+ |
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| Authors: | Xianmin Zhang Chunyan Cao Chenghua Zhang Shiyao Xie Guangwen Xu Jiahua Zhang Xiao-jun Wang |
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| Affiliation: | 1. Department of Physics, Liaoning University, 66 Chong Shan Middle Road, Shenyang 110036, China;2. College of Mathematics and Physics, Jinggangshan University, Ji’an 343009, China;3. Key Laboratory of Excited State Processes, Chinese Academy of Sciences, Changchun 130033, China;4. Department of Physics, Georgia Southern University, Statesboro, GA 30460, USA;1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, PR China;2. Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China;3. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, PR China;1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Kazuo Inamori School of Engineering, New York State College of Ceramics, Alfred University, Alfred, NY 14802, United States;3. Faculty of Chemistry, University of Wroclaw, Wroclaw, Poland;4. Wroclaw Research Centre, EIT+, Wroclaw, Poland;1. Dept. of Technical Physics II, TU Ilmenau, PO Box 100 565, 98684 Ilmenau, Germany;2. Schlumberger-Doll Research, One Hampshire Street, Cambridge, MA 02139, USA;1. MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Red-emitting CaTiO3:Pr3+ phosphors are fabricated using a solid state method and structurally characterized by X-ray diffraction and field emission scanning electron microscopy. The optical properties are investigated using photoluminescence emission, excitation, photoluminescence decay curves, diffused reflectance and thermoluminescence spectra, and persistent phosphorescence decay curves. The optimal fabrication temperatures for photoluminescence and persistent phosphorescence are found at 1200–1300 °C for photoluminescence and 1400 °C for persistent phosphorescence. The energy storage traps for persistent phosphorescence in the system are analyzed based on the dependence of photoluminescence and persistent phosphorescence on sintering temperature. The distribution of energy storage traps is further characterized by thermoluminescence spectra and the parameters of the traps are calculated. Oxygen vacancies as the main trapping centers play the key role for persistent phosphorescence in CaTiO3:Pr3+. |
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