Research Article

Super Broadband-Sensitive Upconversion in Tm and Ni Codoped Perovskites

Figure 7

(a) UC emission and (b) absorption spectra of the CaTi0.9O3:Tm, Ni samples codoped with various alkali ions. Inset is the normalized UC emission intensities integrated over 760–860 nm for various alkali ions substitution.
(a)
(b)