Ultraviolet B emitting Gd doped Al2O3 phosphor – A photoluminescence and electron paramagnetic resonance study
| Autor: | Vijay Singh, Anoop Kumar Srivastava, G. Sivaramaiah, Neelam Singh, J.L. Rao, V. Natarajan, M.S. Pathak |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Diffraction Materials science Photoluminescence Doping Analytical chemistry Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion law.invention law Excited state 0103 physical sciences medicine Electrical and Electronic Engineering 0210 nano-technology Electron paramagnetic resonance Ultraviolet |
| Zdroj: | Optik. 171:552-556 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2018.05.077 |
| Popis: | Al2O3:Gd3+ phosphor was prepared using single step urea combustion method. The prepared phosphor was characterized by X-ray diffraction (XRD), photoluminescence (PL) and electron paramagnetic resonance (EPR) techniques. The formation of the combustion products was confirmed by the XRD analysis. PL studies showed that the Al2O3:Gd3+ phosphor could be excited at 273/276 nm, while an ultraviolet (UV) emission centered at ∼ 314/317 nm was exhibited. The EPR spectrum of sample exhibited resonance signals due to Gd3+ ion at low symmetry sites in the host lattice. Both PL as well as EPR studies of the sample confirmed the presence of Gd3+ in the Al2O3 matrix. |
| Databáze: | OpenAIRE |
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