PROCESS FOR THE PREPARATION OF THIN FILM OF SULFIDE ABSORBER (S) AND SELENIOR (S) OF COPPER, ZINC AND TIN, RECESSED THIN LAYER AND PHOTOVOLTAIC DEVICE OBTAINED

摘要

The present invention provides a compact, coarse crystallized thin film of absorber material consisting essentially of Cu, Zn and Sn sulphide (s) and selenide (s), with fewer defects and preferably with improved composition homogeneity and / or a reduced content of secondary phases, by carrying out a double annealing process in defined atmospheres of thin film of particles of a said absorber material based on sulphide (s) of copper, zinc and tin, preferably CZTS, deposited in the form of an aqueous-alcoholic dispersion of particles in which the large agglomerates have been removed, on a substrate covered with molybdenum (Mo), said thin annealed absorber layer deposited on said substrate Mo conferring improved photovoltaic performances to a photovoltaic device understanding.