Super Broadband-Sensitive Upconversion in Tm and Ni Codoped Perovskites

Figure 5

Time decay profiles of Ni²⁺ emissions at 1400 nm (±25 nm) for the CaTi_0.9O₃:0.2 mol% Ni codoped with various concentrations of Tm³⁺ excited at 960 nm (Ni²⁺ excitation).