Effects of Synthesis Methods on the Characteristics of Material Sr3Y1.95Ge3O12: 0.05Eu3+ (SYGO: Eu3+) for White LED Phosphors Applications
Main Article Content
Abstract
Solid-state reaction, co-precipitation, and sol-gel procedures were used to synthesize the Sr3Y1.95Ge3O12:0.05Eu3+ (SYGO: Eu3+) garnet structure. The morphological structure and photoluminescence properties of the samples were studied. Phosphors have morphologies and particle sizes that vary depending on the preparation. According to the X-ray diffraction pattern measurement, the sol-gel sample only appeared to exhibit the SYGO: Eu3+ characteristic that it shows the cubic structure belonging to the Ia3d (230) space group. In comparison to the two approaches of co-precipitation and solid-phase reaction, the sol-gel method has a more single-phase structure. Under the excitation wavelength of 395 nm, all produced samples emitted red light, with the greatest emission peak at 612 nm, corresponding to the 5D0→7F2 transition of Eu3+ ions in the SYGO host lattice. The color coordinates of the sample SYGO: Eu3+ fabricated by the sol-gel method are x = 0.65 and y = 0.35. Therefore, the SYGO: Eu3+ based on sol-gel method’s synthesis is a promising phosphor for the application of White LED.
Keywords
Sr3Y1.95Ge3O12: 0.05Eu3 phosphors, SYGO:Eu3 , hydrothermal, co-precipitation, solid-state reaction
Article Details
References
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[5] D. Chen, Y. Chen, H. Lu and Z. Ji, A bifunctional Cr/Yb/Tm:Ca3Ga2Ge3O12 phosphor with near-infrared long-lasting phosphorescence and upconversion luminescence, Inorg. Chem., 2014, 53, 8638–8645. http://doi.org/10.1021/ic501238u
[6] Momma, K., Izumi, F., VESTA: a three-dimensional visualization system for electronic and structural analysis, Journal of Applied Crystallography, 41(3), (2008), 653–658. http://doi.org/10.1107/S0021889808012016
[7] Damian Pasinski, Eugeniusz Zych, Jerzy Sokolnicki, Broadband orange phosphor by energy transfer between Ce3+ and Mn2+ in Ca3Al2Ge3O12 garnet host. Journal of Alloys and Compounds 653 (2015) 636-642. http://doi.org/10.1016/j.jallcom.2019.01.340
[8] García-Hipólito, M., Hernández-Pérez, C., Alvarez-Fregoso, O., Martínez, E., Guzmán-Mendoza, J., & Falcony, C., Characterization of europium doped zinc aluminate luminescent coatings synthesized by ultrasonic spray pyrolysis process, Optical Materials, 22(4), (2003), 345–351. http://doi.org/10.1016/S0925-3467(02)00346-4
[9] Werts, M. H. V., Jukes, R. T. F., & Verhoeven, J. W., The emission spectrum and the radiative lifetime of Eu3+ in luminescent lanthanide complexes, Physical Chemistry Chemical Physics, 4(9), (2002), 1542–1549. http://doi.org/10.1039/B107770H
[10] Du, F., Nakai, Y., Tsuboi, T., Huang, Y., & Seo, H. J., Luminescence properties and site occupations of Eu3+ ions doped in double phosphates Ca9R(PO4)7 (R = Al, Lu), Journal of Materials Chemistry, 21(12), 4669. http://doi.org/10.1039/C0JM03324C
[11] Yang, J., Yang, L., Liu, W., Zhang, Y., Fan, H., Wang, Y., … Wang, D, Luminescence behavior of Eu3+ in CaSiO3:Eu3+(Bi3+) and Sr2SiO4:Eu3+(Bi3+), J Alloys Compd, 454(1-2), (2008), 506–509. http://doi.org/10.1016/j.jallcom.2007.02.079
[12] A. Dhahri, K. Horchani-Naifer, A. Benedetti, F. Enrichi, and M. Ferid., Combustion synthesis and photoluminescence of Eu3+ doped LaAlO3 nanophosphor, Opt Mater, 34, (2012), 1742–1746. http://doi.org/10.1016/j.optmat.2012.04.003
[13] Hussain, Sk Khaja, and Jae Su Yu, Broad red-emission of Sr3Y2Ge3O12:Eu2+ garnet phosphors under blue excitation for warm WLED applications, RSC Advances, 7(22), (2017), 13281-13288. http://doi.org/10.1039/C6RA28069B
[14] Sk. Khaja Hussain, L.Krishna Bharat, Dong Hyun Kim, Jae SusYu, Facile pechini synthesis of Sr3Y2Ge3O12:Bi3+/Eu3+ phosphors with tunable emissions and energy transfer for WLEDs, Journal of Alloys and Compounds, (703) 2017, 361-369. http://doi.org/10.1016/j.jallcom.2017.01.345