Cr3+-Doped double perovskite antimonates: efficient and tunable phosphors from NIR-I to NIR-II

By tuning cationic compositions, Cr 3+ -doped antimonate double perovskites present emissions from NIR-I to NIR-II regions. In particular, Ca 2 ScSbO 6 :Cr 3+ and Sr 2 InSbO 6 :Cr 3+ feature long-wavelength emissions with high luminescence efficiency.