RETRACTED ARTICLE: Optical and photoluminescence studies of CoFe2O4 nanoparticles deposited on different substrates

• Published in: Optical and quantum electronics 2023, Vol.55 (5), Article 435
• Main Authors: Ben Khalifa, Sana, Chebaane, Saleh, Beji, Lotfi
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Cobalt ferrites; Computer Communication Networks; Electrical Engineering; Electrochemical etching; Electron microscopes; Fast Fourier transformations; Ferroelectricity; Fourier transforms; Lasers; Light sources; Morphology; Nanocomposites; Nanoparticles; Optical Devices; Optical properties; Optical transition; Optics; Photoluminescence; Photonics; Physics; Physics and Astronomy; Porous silicon; Reflectance; Silicon substrates; Spin coating; Structural analysis; Thin films
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-023-04737-5

Optical characteristics of Cobalt ferrites nanoparticles (CoFe 2 O 4 ) deposited on different substrates are presented and discussed in this paper. These CoFe 2 O 4 nanoparticles, were synthesized using one pot solvo-thermal route and using acetylacatonates of iron and cobalt as precursors. These nanoparticles were deposited by spin coating on Silicon substrate (CoFe 2 O 4 /Si) and on Porous Silicon (CoFe 2 O 4 /PSi) which is prepared via electrochemical etching using p-type Si (100) wafers. Besides; morphological, structural, optical and photoluminescence properties of the nanocomposites will be investigated. Firstly, a scanning electron microscope (SEM) will be used to study the morphology. The Structural Characterization will be done by (XRD) X-Ray diffraction (Cu-Kα radiation). The optical and the photoluminescence properties of the different composites will be also studied using photoluminescence (PL), and Reflectance by a UV–VIS spectrophotometer. As to sum up the results of our research, the morphology of the deposited nanoparticles relies on the used substrate. The enhancement of the optical properties will be investigated by UV–vis reflectance, Fast Fourier Transform (FFT) of the reflectance spectra and Photoluminescence (PL) analyses. Band gap values were determined using the Tauc-plot method. The energies of the indirect optical transition were determined for cobalt ferrites deposited. The (CoFe 2 O 4 /PSi) composite exhibits a large emission in the visible domain. This research opens up new opportunities for building transparent and flexible light sources, photodetectors, and wearable sensors by providing a feasible way for investigating photoluminescence in ferroelectric thin-film systems.