Opt. mater. Opt. mater. Enhanced luminescence of (Eu3+/Sm3+)(diketone)3(N-Base) complexes enabled by ancillary ligands Maurin-Pasturel Guillaume Piñol Rafael Cases Rafael Universidad de Zaragoza Brites Carlos D.S. Saraiva Leonardo F. Carneiro Neto Albano N. Ara Irene Universidad de Zaragoza Falvello Larry Sanjuán Marisa Carlos Luís D. Millán Angel 2026 research-article