In this research work, there are obtained and characterized thin polycrystalline pellicles of compounds II - VI and their combinations in form of ternary materials. It is also approached the optimization of their physical properties, so that they can be directly applicable as active elements in the production of photovoltaic solar cells to thin pellicles.

It is made a complete characterization of the pellicles obtained in all the cases, in others, there are obtained grown ternary compounds for the first time with techniques developed in our laboratories, there are developed models to explain certain physical mechanisms, which are polemic even in specialized literature, and the first photovoltaic structures are made with the collaboration of the National Polytechnic Institute of Mexico, which allows affirming that this work group is the only one in the country with the scientific - technological base able to approach the study and procurement of polycrystalline solar cells to thin pellicles for the construction of photovoltaic solar cells in the country.

This work refers to a very outstanding and strategically important topic for the country. It is the study of photovoltaic materials in form of thin polycrystallyne layers. This type of system is a relatively low-cost alternative for the use of Solar Energy.

The obtained scientific results embrace the study of a group of eight different materials that include "absorbents" and "windows". Among these results, it is included the procurement and the study of pellicles' physical - chemical properties. It is also included the study of a solar device and some technological processes, such as the influence of contacts and the realization of thermal treatments. The results have been presented in twenty publications of international specialized magazines. More than half of the magazines have a great impact in Physics' area and they reflect, in this way, the quality of these results.