Super Broadband-Sensitive Upconversion in Tm and Ni Codoped Perovskites

Figure 3

Relationship between the sample temperature and UC emission intensities (centered at 800 nm) for the CaTi_0.9O₃:Tm, Ni sample excited at different wavelengths. Stokes emission intensity while excited at 325 nm is also plotted for comparison. The inset is the typical spectra while excited at 1490 nm.