Structural and optical properties of (Li-TR(Nd, Er) co-doping sprayed ZnO thin filmsAbderrahim El Hat, Imane Chaki, Rida Essajai, Abdelmajid Fakhim Lamrani and Boubker FaresMatériaux & Techniques, 113 1 (2025) 103DOI: https://doi.org/10.1051/mattech/2025003