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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 4 — Apr. 1, 2012
  • pp: 405–412

The influence of defects formed by Ca excess and thermal post-treatments on the persistent luminescence of CaTiO3:Pr

Eugenio H. Otal, Alexandra E. Maegli, Nina Vogel-Schäuble, Bernhard Walfort, Hans Hagemann, Songhak Yoon, Albert Zeller, and Anke Weidenkaff  »View Author Affiliations

Optical Materials Express, Vol. 2, Issue 4, pp. 405-412 (2012)

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Red emitting CaTiO3:Pr phosphors with a nominal composition of Ca0.998+xPr0.002TiO3+δ (0.02≤x≤0.04) were prepared by solid state reactions with different thermal post treatments and characterized by X-ray diffraction, transmission electron microscopy and photoluminescence. The Ca excess exhibited complete solubility up to 4% in the samples treated at 1400 °C but segregation in the form of Ruddlesden-Popper phases (Ca3Ti2O7 - Ca4Ti3O10) was observed in samples prepared at 1500 °C. The increase in temperature for stoichiometric samples showed a monotonic increase of decay time due to the reduction of non-radiative recombination defects. It was found that the Ca excess favored the formation of oxygen vacancies which are known to act as trap. In the samples treated at 1400 °C, 3% of Ca excess showed to be the best concentration to increase the decay time of persistent luminescence. For the samples treated at 1500 °C, the segregation of Ruddlesden-Popper phases left a constant amount of Ca soluble in all the CaTiO3 samples. This constant concentration of Ca caused the same density of defects and, consequently, the same decay time in all samples.

© 2012 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.4760) Materials : Optical properties
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Fluorescent and Luminescent Materials

Original Manuscript: December 19, 2011
Revised Manuscript: March 1, 2012
Manuscript Accepted: March 2, 2012
Published: March 7, 2012

Virtual Issues
Persistent Phosphors (2012) Optical Materials Express

Eugenio H. Otal, Alexandra E. Maegli, Nina Vogel-Schäuble, Bernhard Walfort, Hans Hagemann, Songhak Yoon, Albert Zeller, and Anke Weidenkaff, "The influence of defects formed by Ca excess and thermal post-treatments on the persistent luminescence of CaTiO3:Pr," Opt. Mater. Express 2, 405-412 (2012)

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  1. T. Matsuzawa, “A new long phosphorescent phosphor with high brightness, SrAl2O4:Eu2+,Dy3+,” J. Electrochem. Soc.143(8), 2670–2673 (1996). [CrossRef]
  2. Y. Lin, Z. Tang, and Z. Zhang, “Preparation of long-afterglow Sr4Al14O25-based luminescent material and its optical properties,” Mater. Lett.51(1), 14–18 (2001). [CrossRef]
  3. P. F. Smet, N. Avci, and D. Poelman, “Red persistent luminescence in Ca2SiS4:Eu,Nd,” J. Electrochem. Soc.156(4), H243–H248 (2009). [CrossRef]
  4. X. Wang, Z. Zhang, Z. Tang, and Y. Lin, “Characterization and properties of a red and orange Y2O2S-based long afterglow phosphor,” Mater. Chem. Phys.80(1), 1–5 (2003). [CrossRef]
  5. A. Lecointre, A. Bessière, A. J. J. Bos, P. Dorenbos, B. Viana, and S. Jacquart, “Designing a red persistent luminescence phosphor: the example of YPO4:Pr3+,Ln3+ (Ln = Nd, Er, Ho, Dy),” J. Phys. Chem. C115(10), 4217–4227 (2011). [CrossRef]
  6. D. Jia, W. Jia, D. R. Evans, W. M. Dennis, H. Liu, J. Zhu, and W. M. Yen, “Trapping processes in CaS:Eu2+,Tm3+,” J. Appl. Phys.88(6), 3402–3407 (2000). [CrossRef]
  7. X.-J. Wang, D. Jia, and W. M. Yen, “Mn2+ activated green, yellow, and red long persistent phosphors,” J. Lumin.102–103, 34–37 (2003). [CrossRef]
  8. X.-B. Yu, L.-H. Mao, L.-Z. Zhang-Fan, L.-Z. Yang, and S.-P. Yang, “The synthesis of ZnS:Mn2+ nano-particles by solid-state method at low temperature and their photoluminescence characteristics,” Mater. Lett.58(29), 3661–3664 (2004). [CrossRef]
  9. K. Van den Eeckhout, P. F. Smet, and D. Poelman, “Persistent luminescence in rare-earth codoped Ca2Si5N8:Eu2+,” J. Lumin.129(10), 1140–1143 (2009). [CrossRef]
  10. Y. Pan, Q. Su, H. Xu, T. Chen, W. Ge, C. Yang, and M. Wu, “Synthesis and red luminescence of Pr3+-doped CaTiO3 nanophosphor from polymer precursor,” J. Solid State Chem.174(1), 69–73 (2003). [CrossRef]
  11. S. S. Chedha, D. W. Smith, A. Vecht, and C. S. Gibbons, “New and improved phosphors for low-voltage applications,” SID Int. Symp. Digest Tech. Papers51, 51–54 (1994).
  12. W. Jia, D. Jia, T. Rodriguez, D. R. Evans, R. S. Meltzer, and W. M. Yen, “UV excitation and trapping centers in CaTiO3:Pr3+,” J. Lumin.119–120, 13–18 (2006). [CrossRef]
  13. S. M. Jacobsen, “Phosphors for full-color low-voltage field-emission displays,” J. Soc. Inf. Disp.4, 331–335 (1996).
  14. J.-C. Zhang, X. Wang, and X. Yao, “Enhancement of luminescence and afterglow in CaTiO3:Pr3+ by Zr substitution for Ti,” J. Alloy. Comp.498(2), 152–156 (2010). [CrossRef]
  15. S. Yin, D. Chen, and W. Tang, “Combustion synthesis and luminescent properties of CaTiO3: Pr, Al persistent phosphors,” J. Alloy. Comp.441(1-2), 327–331 (2007). [CrossRef]
  16. X. Zhang, J. Zhang, X. Zhang, L. Chen, S. Lu, and X.-J. Wang, “Enhancement of red fluorescence and afterglow in CaTiO3: Pr3+ by addition of Lu2O3,” J. Lumin.122–123, 958–960 (2007). [CrossRef]
  17. X. Zhang, J. Zhang, X. Zhang, M. Wang, H. Zhao, S. Lu, and X. Wang, “Size manipulated photoluminescence and phosphorescence in CaTiO3:Pr3+ nanoparticles,” J. Phys. Chem. C111(49), 18044–18048 (2007). [CrossRef]
  18. M. F. Zhou, T. Bak, J. Nowotny, M. Rekas, C. C. Sorrell, and E. R. Vance, “Defect chemistry and semiconducting properties of calcium titanate,” J. Mater. Sci. Mater. Electron.13(12), 697–704 (2002). [CrossRef]
  19. A. Zhu, J. Wang, D. Zhao, and Y. Du, “Native defects and Pr impurities in orthorhombic CaTiO3 by first-principles calculations,” Physica B406(13), 2697–2702 (2011). [CrossRef]
  20. M. Čeh and D. Kolar, “Solubility of CaO in CaTiO3,” J. Mater. Sci.29(23), 6295–6300 (1994). [CrossRef]
  21. M. M. Elcombe, E. H. Kisi, K. D. Hawkins, T. J. White, P. Goodman, and S. Matheson, “Structure determinations for Ca3Ti2O7, Ca4Ti3O10, Ca3.6Sr0.4Ti3O10 and a refinement of Sr3Ti2O7,” Acta Crystallogr. B47(3), 305–314 (1991). [CrossRef]
  22. U. Balachandran and N. G. Eror, “Electrical conductivity in calcium titanate with excess CaO,” Mater. Sci. Eng.54(2), 221–228 (1982). [CrossRef]
  23. S. N. Ruddlesden and P. Popper, “The compound Sr3Ti2O7 and its structure,” Acta Crystallogr.11(1), 54–55 (1958). [CrossRef]
  24. B. V. Beznosikov and K. S. Aleksandrov, “Perovskite-like crystals of the Ruddlesden-Popper series,” Crystallogr. Rep.45(5), 792–798 (2000). [CrossRef]
  25. W. Kwestroo and H. A. M. Paping, “The systems BaO-SrO-TiO2, BaO-CaO-TiO2, and SrO-CaO-TiO2,” J. Am. Ceram. Soc.42(6), 292–299 (1959). [CrossRef]
  26. S. Okamoto and H. Yamamoto, “Emission from BaTiO3:Pr3+ controlled by ionic radius of added trivalent ion,” J. Appl. Phys.91(8), 5492–5494 (2002). [CrossRef]

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