Kaid Slimane, Meriem2023-06-192023-06-192022-06-18salle des thèsesCDhttps://dspace.univ-tlemcen.dz/handle/112/20794Since the event, some forty years ago of powerful computers, numerical methods are increasingly replacing analytical methods. It is now possible for us to calculate with precision the electronic and structural properties of solids from the first principle of quantum calculation. The development in computer simulations has favored interesting studies in the field of condensed matter, because now it is possible to explain and predict the properties of solids whose experiments were impossible before. In this work, we approached in first time, a bibliographical study to be well located in the field of the semiconductors, then in the second time, we carried out a numerical study of the structural, electronic and thermoelectric properties. To contribute to a better understanding of the thermoelectric properties of semiconductors in general, and finally we made an application on ternary materials based on Lead to clearly show the effectiveness of this work, we compared it to other resultsfrKeywords: DFT-Digital simulation-Semiconductor II-IV-Thermoelectric properties-LeadDFT-Simulation numérique-Semi-conducteur II-IV- Propriétés thermoélectriques-Lead.Thesis