Fe(2+) doped in CsPbCl(3) perovskite nanocrystals: impact on the luminescence and magnetic properties

All inorganic halide perovskite nanocrystals (NCs) have wider practical applications owing to their good properties, whereas the photoluminescence quantum yield (PLQY) of the purple emissive CsPbCl(3) NCs is too low to apply in multi-color displays. In this study, earth-abundant Fe(2+) metal ions were successfully incorporated into the lattice of CsPbCl(3) NCs with the partial replacement of the sites of Pb(2+) ions. The impacts of Fe(2+) ions on the luminescence and magnetic properties of CsPbCl(3) NCs were studied using photoluminescence spectroscopy (PL), X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), and a vibrating sample magnetometer (VSM). CsPb(1−x)Fe(x)Cl(3) NCs, with x = 0, 0.1, 0.2, and 0.3, were synthesized at 170 °C. It was found that an appropriate amount of Fe(2+) doping not only improved the homogeneity of the size of NCs, but also enhanced the PLQY and average PL lifetimes. An obvious hysteresis behavior was observed for the NCs, and there was a significant change in the saturation magnetization value with the increase in the Fe(2+) concentration.