Morphology, structural and luminescent properties of sol-gel synthesized SiO2 powders co-doped with Sr2+ and Tb3+
| Autor: | Robin E. Kroon, Lehlohonolo F. Koao, Tshwafo E. Motaung, R.G. Moji, Setumo Victor Motloung |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science Scanning electron microscope Analytical chemistry chemistry.chemical_element Terbium Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Amorphous solid chemistry 0103 physical sciences Electrical and Electronic Engineering 0210 nano-technology Luminescence Spectroscopy Sol-gel |
| Zdroj: | Physica B: Condensed Matter. 580:411817 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2019.411817 |
| Popis: | A series of SiO2 (host), SiO2:0.4 mol% Sr2+ singly doped and SiO2:0.4 mol% Sr2+: x mol% Tb3+ co-doped (where x = 0.04, 0.08, 0.1, 0.4 and 0.5) phosphors was successfully prepared using the sol-gel method. X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), ultraviolet–visible (UV–vis) spectroscopy and photoluminescence (PL) were used to determine the structural, morphological and optical properties of the samples. The XRD results showed that all of the samples were amorphous, while EDS confirmed the presence of the expected elements. PL results confirmed energy transfer from the SiO2 (host) to Tb3+. The highest emission intensity was observed for the co-doped sample containing 0.4 mol% Tb3+. The CIE coordinates showed that the emission colour of the samples could be tuned from blue to green by varying the Tb3+ concentration. |
| Databáze: | OpenAIRE |
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