Photoluminescent properties of Sm3+ and Tb3+ codoped CaWO4 nanoparticles obtained by a one-step sonochemical method
| Autor: | Elson Longo, J. M. P. Silva, N. F. Andrade Neto, Ricardo L. Tranquilin, Mauricio R. D. Bomio, Fabiana V. Motta, J. F. M. Domenegueti |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Scanning electron microscope Doping Analytical chemistry chemistry.chemical_element Terbium Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ultraviolet visible spectroscopy chemistry Photoluminescent properties Transmission electron microscopy 0103 physical sciences Electrical and Electronic Engineering Fourier transform infrared spectroscopy Spectroscopy One‑step sonochemical method |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-020-03878-7 |
| Popis: | Luminescent materials with LED applications can have your emission color controlled by rare earth doping. In this work, Sm3+- and Tb3+-codoped CaWO4 nanoparticles were obtained by a one-step sonochemical method. The nanoparticles were characterized by X-ray diffractogram (XRD), Raman scattering (RS) spectroscopy, The Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and visible ultraviolet spectroscopy (UV–Vis). The photoluminescent measurements were taken at room and lower temperatures for analysis of doping in emission color. The diffractograms indicate the single-phase CaWO4 with the scheelite structure and it was observed a reduction in the crystallite size as the doping. SEM and TEM images indicate the formation of nanospheres for pure and samarium-doped samples, while terbium doping results in the formation of nanorods. Room temperature photoluminescence spectra indicate a blue emission for the bare and samarium-doped CaWO4, while terbium doping emits at the green color. The codoping mixes the colors blue, green, and orange, indicating a potential material with white color emission. |
| Databáze: | OpenAIRE |
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