Cu2+ assisted Mn-doped perovskite nanocrystals thin films: Room-temperature synthesis and improved emission efficiencies

Mn and Cu co-doped perovskite nanocrystal (NCs) thin films with high Mn2+ doping concentration are successfully achieved by a simple one-pot method at room temperature. Structural and compositional analyses manifest that Cu2+ ions can partly replace the Pb2+ ions in the lattice structure and effectively reduce the defect concentration of 2 CsPb(Br/Cl)(3) NCs. Steady-state and time-resolved photoluminescence (PL) spectroscopy were employed to characterize the effect of Cu ions doping on the luminescence properties of Mn-doped CsPb(Br/Cl)(3) NCs. Mn2+ related PL quantum yields of Mn-doped CsPb(Br/Cl)(3) NCs thin films with the Mn/Pb ratios of 7:1 was validly improved from similar to 34% to similar to 50% because of the incorporation of Cu2+ ions. Our work provides a low-cost synthesis for Mn-doped perovskite NCs thin films with high emission efficiency in the application of lighting, display and photodetector. (C) 2022 Published by Elsevier B.V.