Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders
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Jovanović, Dragana J.Antić, Željka
Krsmanović, Radenka
Mitrić, Miodrag
Đorđević, Vesna R.
Bartova, Barbora
Dramićanin, Miroslav
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This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of mag...nitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved.
Keywords:
Co-precipitation synthesis / GdVO4 / Rare earths / PhotoluminescenceSource:
Optical Materials, 2013, 35, 10, 1797-1804Funding / 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.2013.03.012
ISSN: 0925-3467
WoS: 000323401700009
Scopus: 2-s2.0-84880922070
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VinčaTY - JOUR AU - Jovanović, Dragana J. AU - Antić, Željka AU - Krsmanović, Radenka AU - Mitrić, Miodrag AU - Đorđević, Vesna R. AU - Bartova, Barbora AU - Dramićanin, Miroslav PY - 2013 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5639 AB - This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of magnitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved. T2 - Optical Materials T1 - Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders VL - 35 IS - 10 SP - 1797 EP - 1804 DO - 10.1016/j.optmat.2013.03.012 ER -
@article{ author = "Jovanović, Dragana J. and Antić, Željka and Krsmanović, Radenka and Mitrić, Miodrag and Đorđević, Vesna R. and Bartova, Barbora and Dramićanin, Miroslav", year = "2013", abstract = "This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of magnitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved.", journal = "Optical Materials", title = "Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders", volume = "35", number = "10", pages = "1797-1804", doi = "10.1016/j.optmat.2013.03.012" }
Jovanović, D. J., Antić, Ž., Krsmanović, R., Mitrić, M., Đorđević, V. R., Bartova, B.,& Dramićanin, M.. (2013). Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders. in Optical Materials, 35(10), 1797-1804. https://doi.org/10.1016/j.optmat.2013.03.012
Jovanović DJ, Antić Ž, Krsmanović R, Mitrić M, Đorđević VR, Bartova B, Dramićanin M. Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders. in Optical Materials. 2013;35(10):1797-1804. doi:10.1016/j.optmat.2013.03.012 .
Jovanović, Dragana J., Antić, Željka, Krsmanović, Radenka, Mitrić, Miodrag, Đorđević, Vesna R., Bartova, Barbora, Dramićanin, Miroslav, "Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders" in Optical Materials, 35, no. 10 (2013):1797-1804, https://doi.org/10.1016/j.optmat.2013.03.012 . .