Etude du comportement optique et électrique des couches minces sns;application au photovolaique

Abstract

This memory work aims to develop and characterize tin sulphide (SnS) films for photovoltaic applications. We used two techniques: pyrolysis spray and electrochemical method. The samples were synthesized by varying the two parameters: the time imposed for the electrochemical method, and the precursor concentrations for the sol-gel method. After their elaboration, the films underwent to the various characterizations: structural, morphological, optical and electrical. Structural characterization shows that SnS films have an orthorhombic structure of preferential orientation that changes with concentration such as (101), (111), (021). SEM results revealed good grain crystallinity. Optical characterization has shown that SnS films are very absorbent in the visible range, the value of the optical gap is of the order of 1.48eV. Indicating their good bid for solar cell manufacturing. Measurements of the electrical conductivity of films confirm that these materials have good conductivities.