Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles
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Остала ауторстваJovanović, Dragana J.
Gavrilović, Tamara V.
Thi Ngoc Lam Tran
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In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO4:Dy3+ and DyVO4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods with a few nanometers in diameter and up to 10-20 nm in length and microparticles of 1 -8 mu m) obtained by four synthetic methods. The size effect on the structure, Raman active modes, and photoluminescence emission intensities was analyzed by X-ray diffraction, Raman and photo-luminescence spectroscopy, scanning and transmission electron microscopy, and diffuse reflection spectroscopy. All X-ray diffraction patterns clearly indicated presence of a single tetragonal zircon-type phase; absence of impurity phases indicate that the dopant Dy3+ ions were successfully and uniformly incorporated into the GdVO4 host lattice due to the equal valence and similar ionic radii. Micro-Raman measurements support the XRD measurements and showed Raman-active modes of the REVO4 systems... (RE = Gd, Dy). The difference between the two hosts in the diffuse reflectance spectra was observed and it could be attributed to more effective Gd3+ ions on the charge transfer bands and different polarization (compared to bulk material) in smaller nanoparticles. Photoluminescence spectroscopy showed several bands in the visible and near-infrared regions which can be exclusively attributed to the f-f transitions of Dy3+ ions. (C) 2017 Elsevier B.V. All rights reserved.
Кључне речи:Dysprosium doped gadolinium vanadate / Dysprosium vanadate / Raman spectroscopy / Luminescence / Near-infrared region
Извор:Optical Materials, 2018, 76, 308-316
- project: COST Action MP 1401 Advanced Fibre Laser and Coherent Source as tools for Society, Manufacturing and Lifescience ; Ministry of Education and Training, Vietnam International Education Development; ERDF PostDoc project [188.8.131.52/VIAA/1/16/215 (184.108.40.206/16/I/001)]
- 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)