Fig. 6From: Revisiting the Enhanced Red Upconversion Emission from a Single β-NaYF4:Yb/Er Microcrystal By Doping with Mn2+ IonsTime-resolved evolutions of the UC emissions from the β-NaYF4:Yb/Er (20/2 mol%) microcrystals doping with different amounts of Mn2+ ions. a (4S3/2) → 4I15/2 (545 nm), b 2H9/2 → 4I13/2 (560 nm), c 4F9/2 → 4I15/2 (650 nm)Back to article page