Structural, Electrical and Optical Properties of Transparent Conductive Oxides Thin films (TCOs) based on Al doped ZnO nanoparticles for CIGS solar cells
Résumé
The aim of this work is to optimize the thickness from 100 nm to 300 nm and doping ration between 1 at% and 2 at% of Al doped zinc oxide thin films deposit on soda lime glass substrate by sputtering RF-magnetron. The realization and
characterization of the TCO based on Al doped ZnO nanoparticles to design a high-performance nanostructured optical window intended for photovoltaic applications generally found in the technology of second generation thin-film solar
cells based on Cu (In, Ga) Se2 (CIGS) or amorphous silicon require the choice of a purely experimental approach for the optimization of the protocol for synthesizing the Al doped ZnO nanoparticles and an original experimental protocol
to develop nanostructured thin films by RF sputtering from the synthesized nanoparticles. Crystal structure, optoelectronic and morphological properties of thin films were investigated by using XRD, SEM, UV-Vis-NIR. The XRD results
showed that the films were polycrystalline textured, preferentially oriented along the (002) crystallographic direction normal to the film surface. The SEM images showed that the films has smooth and uniform surface with small ZnO
grains. The crystallite size was found to be 27,5 nm. The films show within the visible wavelength region an optical transmittance of more than 90% and an electrical resistivity of 2×10-4 Ω.cm for the optimum. From optical measurements,
the band gap energy value varies from 3.3 to 3.5 eV.
Origine : Fichiers produits par l'(les) auteur(s)