Obtención de películas delgadas de (CdO)x(ZnO)1-x por la técnica de sol-gel y su caracterización

Abstract

In this work (ZnO)x(CdO)1-x thin films, (x = 0.24), were deposited on glass substrates by the Sol-Gel technique. The films were characterized by X-ray diffraction, UV-vis spectroscopy, SEM, and Hall effect. The films were doped with aluminum (1% and 2%), fluorine (2 and 4%), and the simultaneous presence of aluminum and fluorine (1%,1%, respectively). X-ray measurements indicate that the films were polycrystalline containing a mixture of CdO and ZnO phases. The optical transmittance of the films of (ZnO)0.24(CdO)0.76 was found between the one known for CdO and ZnO. A set of the post-deposited films were heat treated with forming gas (96%N2+4%H2), in order to improve their electrical properties. The latter treatment led to films with an improved conductivity of two orders of magnitude. From the results it can be concluded that the addition of both dopands (Al+F) is more efficient than the use of a single dopand (Al or F). Furthermore, the incorporation of both dopands seems to influence in the morphology of the films, presenting a network of intertwined channels