Efecto de la temperatura del sustrato sobre la estructura y propiedades ópticas de películas delgadas de Zno:Al crecidas por rociado pirolítico

• Autor: Velarde Hurtado, Luis Gerardo
• Formato: tesis de grado
• Fecha de Publicación: 2017
• Institución: Universidad Nacional de Trujillo
• Repositorio: UNITRU-Tesis
• Lenguaje: español
• OAI Identifier: oai:dspace.unitru.edu.pe:20.500.14414/10210
• Enlace del recurso: https://hdl.handle.net/20.500.14414/10210
• Nivel de acceso: acceso abierto
• Materia: Transmitancia óptica, ZnO:Al, Rociado pirolítico

In this work, the optical and structural properties of ZnO thin lm doped with aluminum_x000D_ (ZnO:Al) grown by spray pyrolysis by e ect of the temperature of the substrate was_x000D_ evaluated. Were used as precursor solution Zinc Acetate [Zn(CH3CO2)2;2H2O] dissolved_x000D_ in ethanol and aluminum chloride [AlCl3;6H2O] as doping solution dissolved in ultrapure_x000D_ water. Varying substrate temperature was 250 oC to 500 oC, keeping the concentration_x000D_ constant doping to 4% Al atoms. The structural properties of the thin lm grown were_x000D_ characterized by X-Ray Di raction (XRD) and optical transmittance properties were_x000D_ studied using UV-visible (Uv-vis) spectroscopy absorption, in addition an analysis by_x000D_ Scanning Electron Microscopy. The rst study con rmed the stable structural nature of_x000D_ ZnO as Wurtzita hexagonal, with a preferential orientation in the [002]. It was observed_x000D_ that the quality of the crystal structure of the grown thin lm improved with increasing_x000D_ temperature of the substrate, and consequently favoring the optical transmittance in the_x000D_ visible region. It was found that the best value in the optical transmittance greater to the_x000D_ 90% occurs at a temperature of 400 oC, thus demonstrating the feasibility of the pyrolysis_x000D_ spray technique