Excellent red upconversion luminescence in GdLaO3:Er3+/Yb3+/Sc3+ under 980 nm laser excitation

Er 3+ /Yb 3+ are distributed in a double-layer structure, blocked by a single layer of Sc 3+ /La 3+ . Red UCL intensity of (Gd 0.8 Er 0.1 Yb 0.1 )(La 0.9 Sc 0.1 )O 3 is comparable to β-NaYF 4 :Er 3+ /Yb 3+ .