Orange-red luminescence in KAl1−PO4F:Eu3+ (0.1 ≤x≤ 1.0) halophosphate phosphor by a novel facile combustion method
| Autor: | N.S. Kokode, K. N. Shinde, Ashish Akojwar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Chemistry Magnetic dipole transition Analytical chemistry General Physics and Astronomy Phosphor 02 engineering and technology Physics and Astronomy(all) 010402 general chemistry 021001 nanoscience & nanotechnology Combustion 01 natural sciences lcsh:QC1-999 0104 chemical sciences Fourier transform infrared spectroscopy Chromaticity Electric dipole transition 0210 nano-technology Luminescence lcsh:Physics |
| Zdroj: | Results in Physics, Vol 7, Iss, Pp 1161-1166 (2017) |
| ISSN: | 2211-3797 |
| DOI: | 10.1016/j.rinp.2017.02.043 |
| Popis: | Red-emitting phosphor KAl 1-x PO 4 F:Eu x 3+ (0.1 ≤ x ≤ 1.0) were fabricated by combustion process at temperature 750 °C. The XRD patterns did not indicate presence of the starting constituents and other likely phases which are an indirect evidence for the formation of the desired compound. The photoluminescence study shows that the intensity of electric dipole transition ( 5 D 0 → 7 F 2 ) at 613 nm dominates over that of magnetic dipole transition ( 5 D 0 → 7 F 1 ) at 595 nm. The FTIR also shows peaks appearing at 585.41–827.92 cm −1 and 912.99–1074.12 cm −1 correspond to the bending vibrations ( v 4 region) and stretching vibrations ( v 3 region) of PO4 3− group, respectively. The chromaticity coordinate of KAlPO 4 F:Eu 3+ phosphor (x = 0.674, y = 0.325) is much closer to National Television Standard Committee (NTSC) standard value for red phosphor (x = 0.670, y = 0.330). All the spectrum features indicate that KAlPO 4 F:Eu 3+ might be a promising phosphor for lighting or w-LEDs. |
| Databáze: | OpenAIRE |
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