Deposição e caracterização de filmes de óxidos de cobre por spray pirólise

Abstract

Copper oxides are currently being implemented in various sectors ranging from agriculture to the industry of the electronic components. Due to their structural, optical and electrical properties copper oxides have been studied in several areas such as solar cells, semiconductor materials and cathodes of lithium ion batteries. This fact demonstrates this material is very versatile. In this work copper oxides films were deposited by spray pyrolysis technique using the method of sucrose. This method consists on use of solution, which sucrose is the chelating agent. The parameters of synthesis and deposition were controlled for depositing both copper (I) and copper (II) oxides. They play an important role in influencing the physical properties of the films mainly by changing of the sucrose concentration and temperature of deposition of the film. Measurements of X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrical measure for determining the structural, morphological and electrical properties were carried out. The results shows nanostructured films were grown and the phases can be controlled as much changing the parameter depositions (temperature) as changing the sucrose concentration. It was carried out a heat treatment on the samples in order to analyze the influence of heating on the physical properties.