Room-temperature synthesis of Mn 2+ -doped CsPb(Br/Cl) 3 nanocrystal thin films with high Mn substitution ratio

We report a simple and low-cost at room temperature and atmospheric pressure synthetic method for highly stable and photoluminescence (PL) Mn 2+ -doped CsPb(Br/Cl) 3 nanocrystal (NCs) thin films with high Mn-to-Pb feed ratio. The XRD, EDS, and XPS results confirm that Mn ions can be significantly doped in host CsPb(Br/Cl) 3 NCs. PL spectra show multi-color luminescence, which is related to host exciton and Mn 2+ dopant state emission, respectively. In addition, the optical properties of Mn 2+ -doped NCs present the good thermal stability even after 35 days. Furthermore, light-emitting diodes were constructed by employing as-prepared Mn 2+ -doped NCs (Mn-to-Pb feed ratio of 5:1) and CsPbBr 3 with the commercial UV chip, demonstrating that Mn 2+ -doped NCs are applicable to the color converters for the potential field of lighting and display.