Optical properties of biosynthesized nanoscaled Eu2O3 for red luminescence applications

Mohamed, H. E. A.; Hkiri, K.; Khenfouch, M.; Dhlamini, S.; Henini, M.; Maaza, M.

Abstract

This contribution reports on the optical properties of biosynthesised Eu2O3 nanoparticles bioengineered for the first time by a green and cost effective method using aqueous fruit extracts of Hyphaene thebaica as an effective chelating and capping agent. The morphological, structural, and optical properties of the samples annealed at 500°C were confirmed by using a high-resolution transmission electron microscope (HR-TEM), x-ray diffraction analysis (XRD), UV–Vis spectrocopy, and photoluminescence spectrometer. The XRD results confirmed the characteristic body-centered cubic (bcc) structure of Eu2O3 nanoparticles with an average size of 20 nm. HR-TEM revealed square type morphology with an average size of ∼6nm. Electron dispersion energy dispersive x-ray spectroscopy spectrum confirmed the elemental single phase nature of pure Eu2O3. Furthuremore, the Fourier transformed infrared spectroscopy revealed the intrinsic characteristic peaks of Eu−O bond stretching vibrations. UV–Vis reflectance proved that Eu2O3 absorbs in a wide range of the solar spectrum from the VUV–UV region with a bandgap of 5.1 eV. The luminescence properties of such cubic structures were characterized by an intense red emission centered at 614 nm. It was observed that the biosynthesized Eu2O3 nanoparticles exhibit an efficient red-luminescence and hence a potential material as red phosphor.

Citation

Mohamed, H. E. A., Hkiri, K., Khenfouch, M., Dhlamini, S., Henini, M., & Maaza, M. (2020). Optical properties of biosynthesized nanoscaled Eu2O3 for red luminescence applications. Journal of the Optical Society of America A, 37(11), C73-C79. https://doi.org/10.1364/JOSAA.396244

• Journal Article Type: Article
• Acceptance Date: Jul 10, 2020
• Online Publication Date: Aug 6, 2020
• Publication Date: Nov 1, 2020
• Deposit Date: Aug 6, 2020
• Publicly Available Date: Aug 7, 2021
• Journal: Journal of the Optical Society of America A
• Print ISSN: 1084-7529
• Electronic ISSN: 1520-8532
• Peer Reviewed: Peer Reviewed
• Volume: 37
• Issue: 11
• Pages: C73-C79
• DOI: https://doi.org/10.1364/JOSAA.396244
• Public URL: https://nottingham-repository.worktribe.com/output/4813571
• Publisher URL: https://www.osapublishing.org/josaa/abstract.cfm?uri=josaa-37-11-C73
• Additional Information: This article is maintained by: OSA - The Optical Society; Crossref DOI link to publisher maintained version: https://doi.org/10.1364/JOSAA.396244; Article type: research-article; Similarity check: Screened by Similarity Check; Peer reviewed: Yes; Review process: Single blind; Received: 27 April 2020; Accepted: 10 July 2020; Published: 6 August 2020; Copyright: © 2020 Optical Society of America