Citas bibligráficas
García, J., (2024). Efecto de la concentración de Erbio en la fotoluminiscencia de películas delgadas de óxido de Gadolinio obtenidas por el método sol-gel [Universidad Nacional de Trujillo]. https://hdl.handle.net/20.500.14414/20999
García, J., Efecto de la concentración de Erbio en la fotoluminiscencia de películas delgadas de óxido de Gadolinio obtenidas por el método sol-gel []. PE: Universidad Nacional de Trujillo; 2024. https://hdl.handle.net/20.500.14414/20999
@misc{renati/1048978,
title = "Efecto de la concentración de Erbio en la fotoluminiscencia de películas delgadas de óxido de Gadolinio obtenidas por el método sol-gel",
author = "García Huamán, Jorge Luis",
publisher = "Universidad Nacional de Trujillo",
year = "2024"
}
Abstract In this thesis, the synthesis of undoped and trivalent Erbium-doped thin films of Gd2O3(Gd2O3: Er3+) is addressed. These films were synthesized using the sol-gel method with spin-coating on quartz substrate and subjected to a thermal treatment at 750°C for one hour, followed by slow cooling. The effect of different erbium concentrations (3%, 5%, 7%, 9%) on the structural and optical properties of the films was investigated. Various analytical techniques including X-ray Diffraction (XRD), Raman Spectroscopy, Ultraviolet-visible (UV-vis) Spectroscopy, and photoluminescence were employed to characterize the films. XRD results revealed a tendency of the films towards (4 0 0) plane orientation, corresponding to a cubic structure. Additionally, parameters such as crystallite size, lattice parameter, interplanar distances, and dislocation density were calculated from this pattern. Raman spectroscopy identified two vibration modes (Eg, Fg, and Tg-2) related to the cubic structure, along with other Raman modes that have not been documented yet. Regarding optical properties, the films exhibited significant absorption at short wavelengths and an energy bandgap of approximately 4.6 eV. Furthermore, luminescent properties were evaluated, obtaining emission spectra by exciting at wavelengths of 379 nm for doped films and 276 nm for undoped ones. Transitions of trivalent ions Gd3+ and Er3+ were identified, with emissions in the visible spectrum. The 5% concentration of Er3+was found to be optimal for achieving maximum luminescence at around 556 nm corresponding to the 4S3/2→4I15/2 transition, with a decrease observed for higher concentrations
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