Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
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Preparation and Photoluminescent Properties of Ca2PO4Cl Activated by Divalent Europium

  • Park, In Yong (Department of Materials Science and Engineering, Hanbat National University)
  • Received : 2016.12.05
  • Accepted : 2016.12.23
  • Published : 2016.12.31
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Abstract

Divalent europium-activated $Ca_2PO_4Cl$ phosphor powders were prepared by a chemical synthetic method followed by heat treatment in reduced atmosphere, and the crystal structures, morphologies and photoluminescence properties of the powders were investigated by x-ray powder diffraction, scanning electron microscope and spectrometer. The effect of Ca/P mole ratio at the starting materials on the final products was evaluated. The optimized synthesis condition obtained in this study was Ca/P mole ratio of 2.0. The present phosphor materials had higher photoluminescence intensity and better color purity than the commercial blue phosphor powders, $(Ca,Ba,Sr)_{10}(PO_4)_6Cl_2:Eu^{2+}$. The result of excitation spectrum measurement indicated that the excitation efficiency of the synthesized powders was higher for the long-wavelength UV region than that of the commercial phosphor. It was thus concluded that the samples prepared in this study can be successfully applied for the light-emitting devices such as LED excited with long-wavelength UV light sources.

Keywords

References

  1. F. C. Palilla and B. E. O'Reilly, "Alkaline Earth Halophosphate Phosphors Activated by Divalent Europium", J. Electrochem. Soc., 115(10), 1076-1081 (1968). https://doi.org/10.1149/1.2410883
  2. M. Kottaisamy, R. Jagannathan, P. Jeyagopal, R. P. Rao and R. Narayanan, "$Eu^{2+}^$ luminescence in $M_5(PO_4)_3X$ apatites, where M is $Ca^{2+}$, $Sr^{2+}$ and $Ba^{2+}$, and X is $F^-$, $Cl^-$, $Br^-$ and $OH^-$", J. Phys. D: Appl. Phys., 27(10), 2210 (1994). https://doi.org/10.1088/0022-3727/27/10/034
  3. J. R. Sohn, Y. C. Kang, H. D. Park and S. K. Yoon, "Characteristics of Halophosphate Phosphor for Long-wavelength UV Prepared by Spray Pyrolysis", Kor. J. Mater. Res., 12(7), 555 (2002). https://doi.org/10.3740/MRSK.2002.12.7.555
  4. S. Kamiya and H. Mizuno, "Phosphor Handbook", ed. by S. Shionoya and W. M. Yen, Ch. 5, pp. 391, CRC Press, Boca Raton (1999).
  5. R. Dafinova and V. Pelova, "Doubly sensitized manganese band in halophosphate luminophores", J. Mater. Sci. Lett., 15, 1367 (1996).
  6. Y. Zhou, R. Shu, X. Zhang, J. Shi and Z. Han, "VUV spectrum of $Eu^{2+}^$ doped halophosphates", Mater. Sci. Eng. B, 68(1), 48 (1999). https://doi.org/10.1016/S0921-5107(99)00334-7
  7. S. J. Dhoble, "Preparation and characterization of the $Sr_5(PO_4)_3Cl$:$Eu^{2+}^$ phosphor", J. Phys. D: Appl. Phys., 33(2), 158 (2000). https://doi.org/10.1088/0022-3727/33/2/310
  8. J. H. Lee, Y. C. Kang, S. B. Park and H. D. Park, "Luminescence characteristics of Eu-doped strontium halophosphate phosphor particles prepared by spray pyrolysis", Jpn. J. Appl. Phys., Pt. 1, 40(5A), 3222 (2001). https://doi.org/10.1143/JJAP.40.3222
  9. F.-S. Wen, X. Zhao, H. Ding, H. Huo, and J.-S. Chen, "Hydrothermal synthesis and photoluminescent properties of $Sb^{3+}$-doped and ($Sb^{3+}$,$Mn^{2+}$)-co-doped calcium hydroxyapatite", J. Mater. Chem., 12, 3761 (2002). https://doi.org/10.1039/b205807c
  10. M. Greenblatt, E. Banks and B. Post, "The crystal structures of the spodiosite analogs, $Ca_2CrO_4Cl$ and $Ca_2PO_4Cl$", Acta Crystallogr., 23, 166 (1967). https://doi.org/10.1107/S0365110X67002294
  11. Y.-C. Chiu, W.-R. Liu, C.-K. Chang, C.-C. Liao, Y.-T. Yeh, S.-M. Jang and T.-M. Chen, "$Ca_2PO_4Cl:Eu^{2+}^$: An intense near-ultraviolet converting blue phosphor for white lightemitting diodes", J. Mater. Chem., 20(9), 1755 (2010). https://doi.org/10.1039/b920610h
  12. R. Yu, C. Guo, T. Li and Y. Xu, "Preparation and luminescence of blue-emitting phosphor $Ca_2PO_4Cl:Eu^{2+}^$ for n-UV white LEDs", Current Appl. Phys., 13(5), 880 (2013). https://doi.org/10.1016/j.cap.2012.12.020
  13. A. Meijerink and G. Blasse, "Photoluminescence and thermoluminescence properties of $Ca_2PO_4Cl:Eu^{2+}^$", J. Phys.: Condens. Matter., 2, 3619 (1990). https://doi.org/10.1088/0953-8984/2/15/017
  14. A. Meijerink and G. Blasse, "Fano antiresonance in the excitation spectra of the luminescence of divalent europium", Phys. Rev., 40(10), 7288 (1989). https://doi.org/10.1103/PhysRevB.40.7288
  15. E. M. Levin, C. R. Robbins and H. F. McMurdie, "Phase Diagrams for Ceramists", Ed. by M. K. Reser, Fig. 3800, Ohio, U.S.A., (1974).

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