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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 12885–12892

Spray pyrolysis prepared yellow to red color tunable Sr1-xCaxSe:Eu2+ phosphors for white LED

Wonkeun Chung, Hyunchul Jung, Chang Hun Lee, Jihyun Kim, and Sung Hyun Kim  »View Author Affiliations


Optics Express, Vol. 20, Issue 12, pp. 12885-12892 (2012)
http://dx.doi.org/10.1364/OE.20.012885


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Abstract

The spherical and submicron size of Sr1-xCaxSe:Eu2+ phosphors were successfully prepared by ultrasonic spray pyrolysis. The phosphors adopted a cubic structure, and the replacement of Sr2+ with Ca2+ decreased the lattice parameter. The Sr1-xCaxSe:Eu2+ showed broad and strong excitation under 420-460nm blue light, and the emission band could be tuned from 565 to 607nm by increasing the Ca2+ ratio in the host lattice. In addition, the doping of Zn2+ into Sr2+ or Ca2+ enhanced the emission intensity with a small red shift due to the change in crystal field strength and nephelauxetic effects. The warm and high CRI of white LED was achieved using blue LED pumped with blending phosphors of 612nm emitting Ca0.98Zn0.02Se:Eu2+ and 565nm emitting YAG. The correlated color temperatures and CRI were 4719.2K, and 86.3, respectively, and an acceptable color variation was also observed at operating currents ranging from 20 to 70mA.

© 2012 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Devices

History
Original Manuscript: March 23, 2012
Revised Manuscript: May 7, 2012
Manuscript Accepted: May 18, 2012
Published: May 23, 2012

Citation
Wonkeun Chung, Hyunchul Jung, Chang Hun Lee, Jihyun Kim, and Sung Hyun Kim, "Spray pyrolysis prepared yellow to red color tunable Sr1-xCaxSe:Eu2+ phosphors for white LED," Opt. Express 20, 12885-12892 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-12-12885


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References

  1. H. Kasano, K. Megumi, and H. Yamamoto, “Cathodoluminescence of Ca1-x MgxS:A (A = Eu or Ce),” J. Electrochem. Soc.131(8), 1953–1960 (1984). [CrossRef]
  2. N. Yamashita, O. Harada, and K. Nakamura, “Photoluminescence spectra of Eu2+ centers in Ca(S,Se):Eu and Sr(S,Se):Eu,” Jpn. J. Appl. Phys.34(Part 1, No. 10), 5539–5545 (1995). [CrossRef]
  3. J. Haecke, P. Smet, K. Keyser, and D. Poelman, “Single crystal CaS:Eu and SrS:Eu luminescent particles obtained by solvothermal synthesis,” J. Electrochem. Soc.154(9), J278–J282 (2007). [CrossRef]
  4. Y. Hu, W. Zhuang, H. Ye, S. Zhang, Y. Fang, and X. Huang, “Preparation and luminescent properties of (Ca1-x,Srx)S:Eu2+ red-emitting phosphor for white LED,” J. Lumin.111(3), 139–145 (2005). [CrossRef]
  5. K. Kim, J. Park, K. Choi, J. Kim, and C. Kim, “Luminescent properties of CaSe1−xSx:Eu and application in LEDs,” Electrochem. Solid-State Lett.9(8), G262–G264 (2006). [CrossRef]
  6. H. Yu, W. Chung, H. Jung, S. Park, and S. Kim, “Luminous properties of color tunable strontium thio-selenide phosphors for LEDs application,” Mater. Lett.65(17-18), 2690–2692 (2011). [CrossRef]
  7. M. Nazarov and C. Yoon, “Controlled peak wavelength shift of Ca1-xSrx(SySe1-y):Eu2+ phosphor for LED application,” J. Solid State Chem.179(8), 2529–2533 (2006). [CrossRef]
  8. X. Zhang, L. Liang, J. Zhang, and Q. Su, “Luminescence properties of (Ca1-xSrx)Se:Eu2+ phosphors for white LEDs application,” Mater. Lett.59(7), 749–753 (2005). [CrossRef]
  9. H. Yu, W. Chung, H. Jung, S. Park, J. Kim, and S. Kim, “Luminous properties of Sr1-xZnxSe:Eu2+ phosphors for LEDs application,” J. Cryst. Growth326(1), 77–80 (2011). [CrossRef]
  10. I. Taniguchi, “Physical and electrochemical properties of spherical nanostructured LiCrxMn2-xO4 particles synthesized by ultrasonic spray pyrolysis,” Ind. Eng. Chem. Res.44(17), 6560–6565 (2005). [CrossRef]
  11. S. A. Song, K. Y. Jung, and S. B. Park, “Preparation of Y2O3 particles by flame spray pyrolysis with emulsion,” Langmuir25(6), 3402–3406 (2009). [CrossRef] [PubMed]
  12. D. Jung, J. Cho, H. Koo, and Y. Kang, “Characteristics of Ce0.6Tb0.4MgAl11O19 phosphor powders prepared by high temperature flame spray pyrolysis,” J. Alloy. Comp.472(1-2), 367–372 (2009). [CrossRef]
  13. D. Kang and S. Kim, “Morphologies and properties of NiO particles prepared from NiCl2·6H2O by spray pyrolysis,” Kor. J. Chem. Eng.26(6), 1800–1805 (2009). [CrossRef]
  14. C. Chiang, Y. Shin, and S. Ehrman, “Li doped CuO film electrodes for photoelectrochemical cells,” J. Electrochem. Soc.159(2), B227–B231 (2012). [CrossRef]
  15. H. T. Huang, C. C. Tsai, and Y. P. Huang, “Conformal phosphor coating using pulsed spray to reduce color deviation of white LEDs,” Opt. Express18(S2Suppl 2), A201–A206 (2010). [CrossRef] [PubMed]
  16. S. Perkowiz, “Optical Characterization of Semiconductors: Infrared, Raman, and Photoluminescence Spectroscopy” (Academic Press, 1993).
  17. Y. Kim, D. Cho, Y. Jeong, M. Nah, K. Kim, and J. Kang, “Luminescence characterization of (Ca1-xZnx)Ga2S4:Eu2+ phosphors for a white light-emitting diode,” Mater. Res. Bull.45(8), 905–909 (2010). [CrossRef]

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