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https://www.ias.ac.in/article/fulltext/boms/046/0070 -
Keywords
NHAP ;REEs ;doping ;ion exchange ;green-emitting phosphors ;LEDs. -
Abstract
This work reports a synthesized natural Moroccan hydroxyapatite (NHAP) phosphors doped by rare-earth elements using ion exchange technique. The objective of this technique lies in the generation of luminescence after UV excitation of the synthetized phosphors. Effects of doping and co-doping on the NHAP physicochemical properties were investigated using multiple characterization methods such as X-ray diffraction (XRD), scanning electron microscopy, Fourier transform infrared spectroscopy, inductively coupled plasma and photoluminescence spectroscopy. The XRD results show that Tb$^{3+}$/La$^{3+}$ incorporated into NHAP does not change its structure. Under near-ultraviolet excitation at 405 nm, NHAP: xTb$^{3+}$, yLa$^{3+}$ samples show the advantage to obtain a single emission peak, which corresponds to the green colour characteristic of terbium. Moreover, the chromaticity coordinates of NHAP: 0.5%Tb, 1.5%La indicate the excellent cool green-emitting phosphors with a low correlated colour temperature. Overall, the obtained results suggest that NHAP (0.5%Tb: 1.5%La) could be used as multifunctional bio-imaging materials or solid-state lighting for LEDs with high lighting efficiency.
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Graphical Abstract
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Author Affiliations
YASSINE TAHIRI ALAOUI1 NAOUAL SEMLALI AOURAGH HASSANI
- Analysis Laboratory and Synthesis of Industrial Processes, Mohammadia School of Engineers, Mohammed V University in Rabat, BP 765, Rabat, Morocco
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Dates
- Published
- 6 April 2023
- Manuscript received
- 15 July 2022
- Accepted
- 6 December 2022
- Final version published online
- 6 April 2023
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Bulletin of Materials Science
Volume 46, 2023
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