Stable Mn-Doped CsPbCl3 Nanocrystals Inside Mesoporous Alumina Films for Display and Catalytic Applications

Doping Mn2+ in CsPbCl3 nanocrystals has generated exciting optical property, making it a potential candidate for illumination and display applications. Also, it opens up a way to substitute toxic Pb2+ partially by Mn2+. Herein, a mesopore mediated pathway has been investigated towards generation of Mn doped CsPbCl3 nanocrystals inside alumina thin film. Bottle-neck shaped mesopores acting as ‘nano-pots’ provide an ideal confined environment for the synthesis to occur at room temperature and ambient atmosphere. Mn:Pb molar ratio has been deliberately kept less than 1 to examine the extent of doping within that limit and maximum 29.4% substitution of Pb by Mn has been achieved. Role of mesopores, solvents, precursor incorporation sequence in the synthetic procedure has been investigated in detail along with the properties of the composite film. Bright orange stable luminescent coating on large area flexible plastic substrates has been developed by this room temperature, ambient atmosphere synthetic protocol...