Photoluminescence and energy storage traps in CaTiO{sub 3}:Pr{sup 3+}
Journal Article
·
· Materials Research Bulletin
- Department of Physics, Liaoning University, 66 Chong Shan Middle Road, Shenyang 110036 (China)
- College of Mathematics and Physics, Jinggangshan University, Ji'an 343009 (China)
- Key Laboratory of Excited State Processes, Chinese Academy of Sciences, Changchun 130033 (China)
- Department of Physics, Georgia Southern University, Statesboro, GA 30460 (United States)
Red-emitting CaTiO{sub 3}:Pr{sup 3+} 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 {sup o}C for photoluminescence and 1400 {sup o}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 CaTiO{sub 3}:Pr{sup 3+}.
- OSTI ID:
- 22209947
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 45; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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