Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders
Апстракт
We present the structural and luminescent properties of Ho3+/Yb5+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3+ ions. The dopant ions provided the material with intense luminescence emission; green emissions (centered at 542 nm from F-5(4),S-5(2) - GT I-5(8) electronic transition of Ho3+ ions) resulted upon ultraviolet excitation, and red (centered at 659 nm from F-5(5) - GT I-5(8) electronic transition of Ho3+ ions) upon near-infrared excitation. The co-doped materials were obtained under identical experimental conditions by adding Li+ ions (5, 7.5, 10, and 15 mol%). The powders co-doped with 7.5 mol% Li+ ions showed a downconversion emission intensity more than twice as high as the samples without if co-doping. In upconversion, an equal intensifica...tion of emission was achieved with co-doping with 10 mol% Li+. The influences of Ho3+/Yb3+ concentration ratio and Li+ co-doping level on emission color and emission branching was investigated and analyzed for both downconversion and upconversion emission. Increasing Yb3+ concentration was found to increase the share of dominant emission (green) in downconversion, but decreased the share of dominant emission (red) in upconversion. (C) 2015 Elsevier B.V. All rights reserved.
Кључне речи:
Ho3+-doped orthovanadate / Green downconversion / Red upconversion / Li+ co-dopingИзвор:
Optical Materials, 2015, 45, 76-81Финансирање / пројекти:
- Материјали редуковане димензионалности за ефикасну апсорпцију светлости и конверзију енергије (RS-45020)
- Утицај величине, облика и структуре наночестица на њихова својства и својства нанокомпозита (RS-172056)
DOI: 10.1016/j.optmat.2015.03.013
ISSN: 0925-3467; 1873-1252
WoS: 000353857700013
Scopus: 2-s2.0-84927973078
Колекције
Институција/група
VinčaTY - JOUR AU - Gavrilović, Tamara V. AU - Jovanović, Dragana J. AU - Trandafilović, Lidija V. AU - Dramićanin, Miroslav PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/521 AB - We present the structural and luminescent properties of Ho3+/Yb5+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3+ ions. The dopant ions provided the material with intense luminescence emission; green emissions (centered at 542 nm from F-5(4),S-5(2) - GT I-5(8) electronic transition of Ho3+ ions) resulted upon ultraviolet excitation, and red (centered at 659 nm from F-5(5) - GT I-5(8) electronic transition of Ho3+ ions) upon near-infrared excitation. The co-doped materials were obtained under identical experimental conditions by adding Li+ ions (5, 7.5, 10, and 15 mol%). The powders co-doped with 7.5 mol% Li+ ions showed a downconversion emission intensity more than twice as high as the samples without if co-doping. In upconversion, an equal intensification of emission was achieved with co-doping with 10 mol% Li+. The influences of Ho3+/Yb3+ concentration ratio and Li+ co-doping level on emission color and emission branching was investigated and analyzed for both downconversion and upconversion emission. Increasing Yb3+ concentration was found to increase the share of dominant emission (green) in downconversion, but decreased the share of dominant emission (red) in upconversion. (C) 2015 Elsevier B.V. All rights reserved. T2 - Optical Materials T1 - Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders VL - 45 SP - 76 EP - 81 DO - 10.1016/j.optmat.2015.03.013 ER -
@article{ author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Trandafilović, Lidija V. and Dramićanin, Miroslav", year = "2015", abstract = "We present the structural and luminescent properties of Ho3+/Yb5+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3+ ions. The dopant ions provided the material with intense luminescence emission; green emissions (centered at 542 nm from F-5(4),S-5(2) - GT I-5(8) electronic transition of Ho3+ ions) resulted upon ultraviolet excitation, and red (centered at 659 nm from F-5(5) - GT I-5(8) electronic transition of Ho3+ ions) upon near-infrared excitation. The co-doped materials were obtained under identical experimental conditions by adding Li+ ions (5, 7.5, 10, and 15 mol%). The powders co-doped with 7.5 mol% Li+ ions showed a downconversion emission intensity more than twice as high as the samples without if co-doping. In upconversion, an equal intensification of emission was achieved with co-doping with 10 mol% Li+. The influences of Ho3+/Yb3+ concentration ratio and Li+ co-doping level on emission color and emission branching was investigated and analyzed for both downconversion and upconversion emission. Increasing Yb3+ concentration was found to increase the share of dominant emission (green) in downconversion, but decreased the share of dominant emission (red) in upconversion. (C) 2015 Elsevier B.V. All rights reserved.", journal = "Optical Materials", title = "Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders", volume = "45", pages = "76-81", doi = "10.1016/j.optmat.2015.03.013" }
Gavrilović, T. V., Jovanović, D. J., Trandafilović, L. V.,& Dramićanin, M.. (2015). Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders. in Optical Materials, 45, 76-81. https://doi.org/10.1016/j.optmat.2015.03.013
Gavrilović TV, Jovanović DJ, Trandafilović LV, Dramićanin M. Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders. in Optical Materials. 2015;45:76-81. doi:10.1016/j.optmat.2015.03.013 .
Gavrilović, Tamara V., Jovanović, Dragana J., Trandafilović, Lidija V., Dramićanin, Miroslav, "Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders" in Optical Materials, 45 (2015):76-81, https://doi.org/10.1016/j.optmat.2015.03.013 . .