Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders
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Ćulubrk, SanjaAntić, Željka
Marinović-Cincović, Milena
Ahrenkiel, Scott Phillip
Dramićanin, Miroslav
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This work describes the synthesis and photoluminescent properties of rare earth (Sm3+ and Eu3+) doped Gd2Ti2O7 pyrochlore nanopowders. Pure-phase rare earth-doped Gd2Ti2O7 nanoparticles of approximately 20-50 nm in diameter, as evidenced from X-ray diffraction and electron microscopy analysis, are produced via the mixed metal-citric acid complex method. A temperature of 880 degrees C is identified for the formation of the crystalline pyrochlore phase, based on a differential thermal analysis of Gd2Ti2O7 precursor gels. From photoluminescence excitation and emission spectra, measured at 10 K and room temperature, the energy levels of Sm3+ and Eu3+ ions in Gd2Ti2O7 nanoparticles are obtained. The dependence of luminescence emission intensity and emission decays on rare earth concentration are measured and discussed. The strongest Sm3+ orange-reddish emission is observed for samples containing 2.5 at.% of Sm3+ ions, while in the case of Eu3+, the most intense emission is found for 15 at.%... Eu3+ doping. The (4)G(5/2) level lifetime decreases with an increase in Sm3+ concentration, from about 5 ms (for 0.1-0.2 at.% of Sm3+) to 2.4 ms (for 2.5 at.% of Sm3+). With an increase in Eu3+ concentration in the Gd2Ti2O7 nanoparticles, the Eu3+ D-5(0) level lifetime decreases from similar to 5.9 ms (for 0.5 at.% of Sm3+) to 3.1 ms (for 15 at.% of Sm3+). (C) 2014 Elsevier B.V. All rights reserved.
Keywords:
Nanostructures / Optical materials / Photoluminescence spectroscopy / LuminescenceSource:
Optical Materials, 2014, 37, 598-606Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-MESTD-Basic Research (BR or ON)-172056)
DOI: 10.1016/j.optmat.2014.08.001
ISSN: 0925-3467; 1873-1252
WoS: 000345181600101
Scopus: 2-s2.0-85027943942
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VinčaTY - JOUR AU - Ćulubrk, Sanja AU - Antić, Željka AU - Marinović-Cincović, Milena AU - Ahrenkiel, Scott Phillip AU - Dramićanin, Miroslav PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/217 AB - This work describes the synthesis and photoluminescent properties of rare earth (Sm3+ and Eu3+) doped Gd2Ti2O7 pyrochlore nanopowders. Pure-phase rare earth-doped Gd2Ti2O7 nanoparticles of approximately 20-50 nm in diameter, as evidenced from X-ray diffraction and electron microscopy analysis, are produced via the mixed metal-citric acid complex method. A temperature of 880 degrees C is identified for the formation of the crystalline pyrochlore phase, based on a differential thermal analysis of Gd2Ti2O7 precursor gels. From photoluminescence excitation and emission spectra, measured at 10 K and room temperature, the energy levels of Sm3+ and Eu3+ ions in Gd2Ti2O7 nanoparticles are obtained. The dependence of luminescence emission intensity and emission decays on rare earth concentration are measured and discussed. The strongest Sm3+ orange-reddish emission is observed for samples containing 2.5 at.% of Sm3+ ions, while in the case of Eu3+, the most intense emission is found for 15 at.% Eu3+ doping. The (4)G(5/2) level lifetime decreases with an increase in Sm3+ concentration, from about 5 ms (for 0.1-0.2 at.% of Sm3+) to 2.4 ms (for 2.5 at.% of Sm3+). With an increase in Eu3+ concentration in the Gd2Ti2O7 nanoparticles, the Eu3+ D-5(0) level lifetime decreases from similar to 5.9 ms (for 0.5 at.% of Sm3+) to 3.1 ms (for 15 at.% of Sm3+). (C) 2014 Elsevier B.V. All rights reserved. T2 - Optical Materials T1 - Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders VL - 37 SP - 598 EP - 606 DO - 10.1016/j.optmat.2014.08.001 ER -
@article{ author = "Ćulubrk, Sanja and Antić, Željka and Marinović-Cincović, Milena and Ahrenkiel, Scott Phillip and Dramićanin, Miroslav", year = "2014", abstract = "This work describes the synthesis and photoluminescent properties of rare earth (Sm3+ and Eu3+) doped Gd2Ti2O7 pyrochlore nanopowders. Pure-phase rare earth-doped Gd2Ti2O7 nanoparticles of approximately 20-50 nm in diameter, as evidenced from X-ray diffraction and electron microscopy analysis, are produced via the mixed metal-citric acid complex method. A temperature of 880 degrees C is identified for the formation of the crystalline pyrochlore phase, based on a differential thermal analysis of Gd2Ti2O7 precursor gels. From photoluminescence excitation and emission spectra, measured at 10 K and room temperature, the energy levels of Sm3+ and Eu3+ ions in Gd2Ti2O7 nanoparticles are obtained. The dependence of luminescence emission intensity and emission decays on rare earth concentration are measured and discussed. The strongest Sm3+ orange-reddish emission is observed for samples containing 2.5 at.% of Sm3+ ions, while in the case of Eu3+, the most intense emission is found for 15 at.% Eu3+ doping. The (4)G(5/2) level lifetime decreases with an increase in Sm3+ concentration, from about 5 ms (for 0.1-0.2 at.% of Sm3+) to 2.4 ms (for 2.5 at.% of Sm3+). With an increase in Eu3+ concentration in the Gd2Ti2O7 nanoparticles, the Eu3+ D-5(0) level lifetime decreases from similar to 5.9 ms (for 0.5 at.% of Sm3+) to 3.1 ms (for 15 at.% of Sm3+). (C) 2014 Elsevier B.V. All rights reserved.", journal = "Optical Materials", title = "Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders", volume = "37", pages = "598-606", doi = "10.1016/j.optmat.2014.08.001" }
Ćulubrk, S., Antić, Ž., Marinović-Cincović, M., Ahrenkiel, S. P.,& Dramićanin, M.. (2014). Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders. in Optical Materials, 37, 598-606. https://doi.org/10.1016/j.optmat.2014.08.001
Ćulubrk S, Antić Ž, Marinović-Cincović M, Ahrenkiel SP, Dramićanin M. Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders. in Optical Materials. 2014;37:598-606. doi:10.1016/j.optmat.2014.08.001 .
Ćulubrk, Sanja, Antić, Željka, Marinović-Cincović, Milena, Ahrenkiel, Scott Phillip, Dramićanin, Miroslav, "Synthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowders" in Optical Materials, 37 (2014):598-606, https://doi.org/10.1016/j.optmat.2014.08.001 . .