Open Access

Peer-reviewed

Research Article

Main Article Content

Jinkai Li
Bin Liu
Qi Chen
Yizhong Lucorresponding author
Zongming Liu

Abstract

The long afterglow fluorescent material of M1-3xAl2O4:Eu2+x/Dy3+2x (M2+ = Sr2+, Ca2+ and Ba2+) phosphors are successfully synthesized by calcining precursor obtained via co-precipitation method at 1300 oC for 4 h with reducing atmosphere (20% H2 and 80% N2. The phase evolution, morphology and afterglow fluorescent properties are systematically studied by the various instruments of XRD, FE-SEM, PLE/PL spectroscopy and fluorescence decay analysis. The PL spectra shows that the Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors display vivid green emission at ~519 nm (4f65d1→4f7 transition of Eu2+) with monitoring of the maximum excitation wavelength at ~334 nm (8S7/26IJ transition of Eu2+), among which the optimal concentration of Eu2+ and Dy3+ is 15 at % and 30 at %, respectively. The color coordinates and temperature of Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors are approximately at (~0.27, ~0.57) and ~6700 K, respectively. On the above basis, the M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors is obtained by the same method. The PL spectra of these phosphors shows the strongest blue emission at ~440 nm and cyan emission at ~499 nm under ~334 nm wavelength excitation, respectively, which are blue shifted comparing to Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors. The color coordinates and temperatures of M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors are approximately at (~0.18, ~0.09),~2000 K and (~0.18, ~0.42), ~11600 K, respectively. In this work, long afterglow materials of green, blue and cyan aluminates phosphors with excellent properties have been prepared, in order to obtain wide application in the field of night automatic lighting and display.

Keywords
long afterglow material, co-precipitation method, f M­­­­­­₁₋₃ₓAl₂O₄:Eu²⁺ₓ/Dy³⁺₂ₓ (M²⁺= Sr²⁺, Ca²⁺ and Ba²⁺) phosphors, luminescent property

Article Details

How to Cite
Li, J., Liu, B., Chen, Q., Lu, Y., & Liu, Z. (2019). Synthesis of M­­­­­­₁₋₃ₓAl₂O₄:Eu²⁺ₓ/Dy³⁺₂ₓ (M²⁺= Sr²⁺, Ca²⁺ and Ba²⁺) phosphors with long-lasting phosphorescence properties via co-precipitation method. Chemical Reports, 1(2), 112-117. https://doi.org/10.25082/CR.2019.02.008

References

  1. Palilla FC, Levine AK and Tomkus MR. Fluorescent properties of alkaline earth aluminates of type MAl2O4 activated by divalent europium. Journal of Electrochemical Society, 1968, 115(6): 642-644. https://doi.org/10.1149/1.2411379
  2. Akiyama M, Xu CN, Nonaka K, et al. Intense visible light emission from SrAl2O6:Eu,Dy. Applied Physics Letters, 1998, 73(21): 3046-3048. https://doi.org/10.1063/1.122667
  3. Matsuzawa T, Aoki Y, Takeuchi N, et al. A new long phosphorescent phosphor with high brightness SrAl2O4:Eu2+, Dy3+. Journal of Electrochemical Society, 1996, 143(8): 2670-2673. https://doi.org/10.1149/1.1837067
  4. Peng M and Hong G. Reduction from Eu3+ to Eu2+ in BaAl2O4:Eu phosphor prepared in an oxidizing atmosphere and luminescent properties of BaAl2O4:Eu. Journal of Luminescence, 2007, 127(2): 735-740. https://doi.org/10.1016/j.jlumin.2007.04.012
  5. Chang C, Li W, Huang X, et al. Photoluminescence and afterglow behavior of Eu2+, Dy3+ and Eu3+, Dy3+ in Sr3Al2O6 matrix. Journal of Luminescence, 2010, 130(3): 347-350. https://doi.org/10.1016/j.jlumin.2009.09.016
  6. Gheorghe C, Gheorghe L, Achim A, et al. Optical properties of Sm3+ doped strontium hexa-aluminate single crystals. Journal of Alloys and Compounds, 2015, 622: 296- 302. https://doi.org/10.1016/j.jallcom.2014.10.033
  7. Lupei V, Lupei A, Gheorghe C, et al. Composition dependence of Pr3+ spectral characteristics in strontium lanthanum aluminate crystals. Optical Materials, 2007, 30(1): 164-167. https://doi.org/10.1016/j.optmat.2006.11.018
  8. Gu X, Fu R, Yang F, et al. Tailoring the photoluminescence properties of lanthanum strontium aluminate phosphors by controlling crystal field environment with fluorine ions. Journal of Rare Earths, 2016, 34(11): 1089-1094. https://doi.org/10.1016/S1002-0721(16)60139-4
  9. Singh VP, Rai SB, Mishra H, et al. Stabilization of high temperature hexagonal phase of SrAl2O4 at room temperature: role of ZnO. Dalton Transactions, 2014, 43(14): 5309-5316. https://doi.org/10.1039/c3dt52869c
  10. Hwang KS, Kang BA, Kim SD, et al. Cost-effective electrostatic-sprayed SrAl2O4:Eu2+phosphor coatings by using salted sol-gel derived solution. Bulletin of Materials Science, 2011, 34(5): 1059-1062. https://doi.org/10.1007/s12034-011-0128-y
  11. Preethi KRS, Lu C, Thirumalai J, et al. SrAl4O7:Eu2+ nanocrystals: synthesis and fluorescence properties. Journal of Physics D (Applied Physics), 2004, 37(19): 2664-2669. https://doi.org/10.1088/0022-3727/37/19/009
  12. Huang SH, Wang XJ, Chen BJ, et al. Photon cascade emission and quantum efficiency of the 3P0 level in Pr3+-doped SrAl12O19 system. Journal of Luminescence, 2003, S102- 103: 344-348. https://doi.org/10.1016/S0022-2313(02)00527-6
  13. Zhong RX, Zhang JH, Zhang X, et al. Red phosphorescence in Sr4Al14O25 : Cr3+,Eu2+,Dy3+ through persistent energy transfer. Applied Physics Letters, 2006, 88(20): 2670. https://doi.org/10.1063/1.2205167
  14. Sasaki T, Fukushima J, Hayashi Y, et al. Synthesis and photoluminescence properties of a novel Sr2Al6O11:Mn4+ red phosphor prepared with a B2O3 flux. Journal of Luminescence, 2018, 194: 446-451. https://doi.org/10.1016/j.jlumin.2017.10.076
  15. Chen R, Hu Y, Chen L, et al. Luminescent properties of a novel afterglow phosphor Sr3Al2O5C12:Eu2+, Ce3+. Ceramics International, 2014, 40(6): 8229-8236. https://doi.org/10.1016/j.ceramint.2014.01.020
  16. Ueda J, Aishima K, Nishiura S, et al. Afterglow Luminescence in Ce3+-Doped Y3Sc2Ga3O12 Ceramics. Applied Physics Express, 2011, 4(4): 257-261. https://doi.org/10.1143/APEX.4.042602
  17. Wang W, Li J, Duan G, et al. Morphology/Size Effect on the Luminescence Properties of the
  18. [(YxGd1