Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

Synthesis of CaS:Eu2+ Phosphor by using a Sealing Vessel and its Photoluminescence Properties

  • Yoo, Hyoung-Sun (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Bong-Je (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kang, Jong-Hyuk (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Im, Won-Bin (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jeon, Duk-Young (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
  • Published : 2007.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

We have synthesized $CaS:Eu^{2+}$ phosphor by using a sealing vessel and evaluated its photoluminescence properties. The method using a sealing vessel is simple and economical in comparison with other methods reported up to date. As an activator concentration was increased from 0.1 mol% to 4 mol%, the main emission wavelength of the phosphor was increased from 642 nm to 651 nm due to the crystal field splitting of 5d levels of $Eu^{2+}$ ion. Although the same amount of $Eu_2O_3$ was used, the concentration of the activator ions, which were reduced from $Eu^{3+}\;to\;Eu^{2+}$ and substituted $Ca^{2+}$ ions, was increased with increase of firing temperature. Therefore, the main emission wavelength was also. shifted from 645 nm to 651 nm with increase of firing temperature from $1100^{\circ}C\;to\;1300^{\circ}C$. The critical distance($R_{c1}=20.65\;{\AA}$) between $Eu^{2+}$ ions calculated from the critical concentration was well matched with that($R_{c2}=19.17\;{\AA}$) calculated from the Dexter formula.

Keywords

References

  1. K. F. Stripp and R. Ward, 'The effect of activator concentration on the infrared-sensitive phosphor, striontium sulfide-samarium, europium', J. Am. Chem. Soc., Vol. 70, p. 401, 1948
  2. P. D. Keir, J. F. Wagera, L. Clark, D. Li, and D. A. Keszler, 'Alkali metal co activators in SrS: Cu,F thin-film electroluminescent devices', Appl. Phys. Lett., Vol. 75, p. 1398, 1999
  3. Y. Hu, W. Zhuang, H. Ye, S. Zhang, Y. Fang, and X. Huang, 'Preparation and luminescent properties of $(Ca_{1-x},Sr_{x})S:Eu^{2+}$ red-emitting phosphor for white LED', J. Lumin., Vol. 111, p. 139, 2005 https://doi.org/10.1016/j.jlumin.2004.07.005
  4. K. N. Kim, J. K. Park, K. J. Choi, J. M. Kim, and C. H. Kim, 'Luminescent properties of $CaSe_{1-x}S_{x}:Eu$ and application in LEDs', Electrochem. Solid. St., Vol. 9, p. G262, 2006 https://doi.org/10.1149/1.2206006
  5. Y. D. Huh, J. H. Shim, Y. Kim, and Y. R. Do, 'Optical properties of three-band white light emitting diodes', J. Electrochem. Soc., Vol. 150, p. H57, 2003 https://doi.org/10.1149/1.1535914
  6. Y. H. Jeong, K. S. Myung, J. D. Kim, S. D. Han, J. W. Park, and K. C. Singh, 'Synthesis and luminescence characterization of $Eu^{3+}$ doped $Gd_{2}O_{3}$ phosphors by combustion method', Trans. EEM, Vol. 4, No. 5, p. 28, 2003
  7. S. J. Kim, 'Precursor process designing to synthesize nano-sized phosphors', Trans. EEM, Vol. 7, No. 1, p. 26, 2006 https://doi.org/10.4313/TEEM.2006.7.1.026
  8. H. S. Yoo, H. S. Jang, W. B. Im, J. H. Kang, and D. Y. Jeon, 'Particle size control of a monodisperse spherical $Y_{2}O_{3}:Eu^{3+}$ phosphor and its photoluminescence properties', J. Mater. Res., Vol. 22, p. 2017, 2007 https://doi.org/10.1557/jmr.2007.0257
  9. R. C. Buchanan and T. Park, 'Materials Crystal Chemistry', Marcel Dekker, Inc., New York, p. 97, 1997
  10. S. Oshio, T. Matsuoka, S. Tanaka, and H. Kobayashi, 'Mechanism of luminance decrease in $BaMgAl_{10}O_{17}:Eu^{2+}$ phosphor by oxidation', J. Electrochem. Soc., Vol. 145, p. 3903, 1998
  11. G. Blasse and B. C. Grabmaier, 'Luminescent Materials', Springer-Verlag, Berlin, p. 91, 1994
  12. W. B. Im, Y. I. Kim, J. H, Kang, D. Y. Jeon, H. K. Jung, and K. Y. Jung, 'Neutron rietveld analysis for optimized $CaMgSi_{2}O_{6}:Eu^{2+}$ and its luminescence properties', J. Mater. Res., Vol. 20, p. 2061, 2005 https://doi.org/10.1557/JMR.2005.0253
  13. D. L. Dexter, 'A theory of sensitized luminescence in solids', J. Chem. Phys., Vol. 21, p. 836, 1953
  14. G. Blasse, 'Energy transfer in oxidic phosphors', Philips Res. Pepts., Vol. 24, p. 131, 1969