Nanocrystalline (Ho0.03Y0.97)2Hf2O7 luminophore for near- and mid-infrared Petr Vařák, Jan Mrázek and Jana Proboštová EPJ Web Conf., 287 (2023) 05034 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328705034