Doping Mnin hybrid Ruddlesden-Popper phase of layered double perovskite (BA)AgBiBr.

The layered hybrid double perovskites emerged as excellent semiconductor materials owing to their environment compatibility and stability. However, these materials are weakly luminescent, and their photoluminescence (PL) properties can be modulated via doping. While Mndoping in perovskites is well known, but to the best of our knowledge the doping of Mnin layered double perovskites (LDPs) is yet to be explored. Herein, for the first time, we demonstrate the doping of Mnin hybrid inorganic-organic two-dimensional (2D) LDPs, (BA)AgBiBr(BA = n-butyl amine) via a simple solid-state mechanochemical route. The powder x-ray diffraction pattern, and electron paramagnetic resonance analysis confirm the successful incorporation of Mnions inside (BA)AgBiBrlattice. The Mndoped 2D LDP shows energy transfer from host excitons to d-electrons of Mnions, which results in red-shifted broad Mnemission band centered at 625 nm, attributed to theTtoAinternal transition. This work opens up new possibilities to dope metal ions in 2D LDPs to tune the optical as well as magnetic properties.