The Morphologies and Photoluminescence of Ce³⁺-Doped 0.5La₂O₃-2SrO-0.5Al₂O₃ Phosphors with SrF₂

Abstract:

Ce³⁺-doped 0.5La₂O₃-2SrO-0.5Al₂O₃ (LSA:Ce) phosphors had been successfully synthesized using a conventional solid-state reaction method under reducing atmosphere (H₂/N₂ =1/5). The phase, morphologies and luminescence properties of the LSA:Ce phosphors were investigated. The emission intensity of LSA:Ce phosphors was improved by the addition of SrF₂ as flux, and red shift of PL spectra peak was observed in this phosphors. Research results shown that the LSA:Ce phosphors have the potential to meet the development of white light-emitting diodes.

• Periodical: Key Engineering Materials (Volume 680)
• Pages: 228-232
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.680.228
• Online since: February 2016
• Authors: Xi Guang Gu*, Ren Li Fu, Ye Tang, Fang Yang
• Keywords: 0.5La₂O₃-2SrO-0.5Al₂O₃, Luminescence Properties, SrF₂

References

[1] Y. Hu, W. Zhuang, H. Ye, A novel red phosphor for white light emitting diodes, J. Alloys Compd. 390 (2005) 226–229.

DOI: 10.1016/j.jallcom.2004.07.063

[2] Z.L. Wang, H.B. Liang, L.Y. Zhou, A potential red phosphor ZnMoO4: Eu3+ for light-emitting diode application, Chem. Phys. Lett. 412 (2005) 313–316.

[3] S. Yan, J. Zhang, X. Zhang, Enhanced red emission in CaMoO4: Bi3+, Eu3+, J. Phys. Chem. C 111 (2007) 13256–13260.

[4] S. Nakamura, T. Mukai and M. Senoh, Candela class high brightness InGaN/AlGaN double heterostructure blue light emitting diodes, Appl. Phys. Lett., 1994, 64, 1687.

DOI: 10.1063/1.111832

[5] M. G. Craford, Commerical Light Emitting Diode Technology, Kluwer, Dordrecht, (1996).

[6] L.S. Rohwer and A.M. Srivastava, Development of Phosphors for LEDS, Electrochem. Soc. Interface., 2003, 12, 36.

[7] W.B. Im,N. N. Fellows, S. P. DenBaars, R. Seshadri, La1-x-0. 025Ce0. 025Sr2+ x Al1− xSixO5 solid solutions as tunable yellow phosphors for solid state white lighting, J. Mater. Chem. 19(9) (2009)1325–1330.

DOI: 10.1039/b818313a

[8] W.B. Im, Y. Fourr, Ú.S. Brinkley, Substitution of oxygen by fluorine in the GdSr2AlO5: Ce3+ phosphors: Gd1−xSr2+xAlO5−xFx solid solutions for solid state white lighting, Opt. Express 17(25) (2009) 22673–22679.

DOI: 10.1364/oe.17.022673

[9] W.B. Im,N. George, J. Kurzman, S. Brinkley, Efficient and Color Tunable Oxyfluoride Solid Solution Phosphors for Solid-State White Lighting, Adv. Mater. 23(20)(2011)2300-2305.

DOI: 10.1002/adma.201003640

[10] H.K. Kim K.Y. Jung, A red-emitting phosphor LaSr2AlO5: Eu3+/Eu2+ prepared under oxidative and reductive atmospheres, J. Lumin. 132(2012)1376–1381.

DOI: 10.1016/j.jlumin.2014.07.018

[11] C.E. Rodriguez-Garcia, E.M. Tejeda, F.F. Castillon , A New Red-Emitting La1–xPrxSr2AlO5 Phosphor Powder Prepared by Combustion Synthesis, J. Nanosci. notechnol. 11 (2011) 5587.

[12] R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides, Acta Crystallogr. B32, (1976) 751–767.

DOI: 10.1107/s0567739476001551

[13] W. Jiang et al. A red-emitting phosphor LaSr2AlO5: Eu3+/Eu2+ prepared under oxidative and reductive atmospheres, Journal of Luminescence. 157, (2015) 46–5252.

DOI: 10.1016/j.jlumin.2014.07.018