Congratulations Andrew and Bin on their work on “Interstitial Nature of Mn2+ Doping in 2D Perovskites”

Andrew Torma and Wenbin Li, along with our collaborators at INSA Rennes, AFRL and ANL show that doping Mn²⁺ into the perovskite structure results in a lattice expansion which contrasts with the predicted contraction expected to arise from the B-site metal substitution, thus implying that Mn²⁺ does not replace the Pb²⁺ sites.

This behavior was observed by performing correlated nanoscale X-ray microscopy, spatially and temporally resolved photoluminescence measurements and magnetic force microscopy on the inorganic 2D perovskite Cs₂PbI₂Cl₂.

These measurements show the fate of the transition metal dopants, the local structure, and optical emission when they are doped at dilute concentrations into a wide bandgap semiconductor.

Link to the paper: https://doi.org/10.1021/acsnano.1c09142