Advances in materials Research

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Synthesis and photoluminescence of Ca3Si3O8F2: Ce4+, Eu3+, Tb3+ phosphor

  • Suresh, K. (Department of Physics, CSR Sarma College) ;
  • PoornachandraRao, Nannapaneni V. (Department of Physics, Rajiv Gandhi University of Knowledge Technologies) ;
  • Murthy, K.V.R. (Department of Applied Physics, Faculty of Engineering and Technology, M.S. University of Baroda)
  • Received : 2014.05.11
  • Accepted : 2014.12.24
  • Published : 2014.12.25
⟨ Previous Next ⟩

Abstract

$Ce^{4+}$, $Eu^{3+}$, $Tb^{3+}$ co-doped $Ca_3Si_3O_8F_2$ phosphor was synthesized via solid state reaction method using $CaF_2$, $CaCO_3$ and $SiO_2$ as raw materials for the host and $Eu_2O_3$, $CeO_2$, and $Tb_4O_7$ as activators. The luminescent properties of the phosphor was analysed by spectrofluorophotometer at room temperature. The effect of excitation wavelengths on the luminescent properties of the phosphor i.e. under near-ultraviolet (nUV) and visible excitations was investigated. The emission peaks of $Ce^{4+}$, $Eu^{3+}$, $Tb^{3+}$ co-doped $Ca_3Si_3O_8F_2$ phosphor lays at 480(blue band), 550(green band) and 611nm (red band) under 380nm excitation wavelength, attributed to the $Ce^{4+}$ ion, $Tb^{3+}$ ion and $Eu^{3+}$ ions respectively. The results reveal that the phosphor emits white light upon nUV (380nm) / visible (465nm) illumination, and a red light upon 395nm / 535nm illumination. RE ions doped $Ca_3Si_3O_8F_2$ is a promising white light phosphor for LEDs. The emission colours can be seen using Commission international de l'eclairage (CIE) co-ordinates. A single host phosphor emitting different colours under different excitations indicates that it is a potential phosphor having applications in many fields.

Keywords

References

  1. Chen, Y., Gong, M. and Cheah, KW. (2010), "Effects of fluxes on the synthesis of $Ca_3Sc_2Si_3O_{12}:Ce^{3+}$ green phosphors for white light-emitting diodes", Mater. Sci. Eng. B, 166, 24-27. https://doi.org/10.1016/j.mseb.2009.09.024
  2. Cheng, G. and Liu, Q. (2010), "Synthesis and luminescence property of $Sr_3SiO_5:Eu^{2+}$ phosphors for white LED", J.Rare Earths, 28(4), 526-528. https://doi.org/10.1016/S1002-0721(09)60146-0
  3. Chiu, C.H. Liu, C.H. Huang, S.B. and Chen, T.M. (2007), "White-light-emitting diodes using red-emitting LiEu(WO4)(2-x)(MoO4)(x) phosphors", J. Elect. Soc., 154, 181-184.
  4. Choi, S.W. Hong, S.H. and Kim, Y.J. (2009), "Characterization of $Ca_2SiO_4:Eu^{2+}$ Phosphors Synthesized by Polymeric Precursor Process", J. Am. Ceramic Soc., 92(9), 2025-2028. https://doi.org/10.1111/j.1551-2916.2009.03169.x
  5. Guo, H. Wang, X.F., Effect of $NH_4F$ flux on structural and luminescent properties of $Sr_2SiO_4:Eu^{2+}$ phosphors prepared by solid-state reaction method. Journal of the Electrochemical Society, Vol.157, J310-J314, 2010 https://doi.org/10.1149/1.3454723
  6. Lee, S.H, Koo, H.Y., Lee, S.Y. (2010), Ceramics International 36, 339-343. https://doi.org/10.1016/j.ceramint.2009.09.012
  7. Nakanishi, T. and Tanabe, S. (2009), "Preparation and luminescent properties of $Eu^{2+}$-activated glass ceramic phosphor precipitated with ${\beta}-Ca_2SiO_4$ and $Ca_3Si_2O_7$", Phys. Status Solidi (a), 206(5), 919-922. https://doi.org/10.1002/pssa.200881326
  8. Park, W.J. Jung, M.K. Kang, S.M. Masaki T. and Yoon, D.H. (2008), "Synthesis and photoluminescence characterization of $Ca_3Si_2O_7$:$Eu^{2+}$ as a potential green-emitting white LED phosphor", J. Physics Chem. Solids, 69(5), 1505-1508. https://doi.org/10.1016/j.jpcs.2007.10.093
  9. Wang Zhi-Jun, Yang Zhi-Ping, Guo Qing-Lin, Li Pan-Lai and Fu Guang-Sheng (2009), "Luminescence characteristics of $Eu^{2+}$ activated $Ca_2SiO_4$ $Sr_2SiO_4$ and $Ba_2SiO_4$ phosphorsfor white LEDs", Chinese Physics B, 18(5), 2068-2071. https://doi.org/10.1088/1674-1056/18/5/057