Innovative selective solar absorber for high vacuum flat panelDaniela De Luca, Antonio Caldarelli, Eliana Gaudino, Paolo Strazzullo, Marilena Musto, Umar Farooq, Emiliano Di Gennaro and Roberto RussoEPJ Web Conf., 287 (2023) 05017DOI: https://doi.org/10.1051/epjconf/202328705017