Abstract
You can't get both at the same time; cation-exchangeable d0 perovskites possess interesting interlayer chemistry, but lack the electronic and magnetic functionalities that many mixed valence dn (n>0) perovskites are privileged to. To bridge this gap, the insulating, cation-exchangeable layered perovskite RbLaNb2O7 was treated with PTFE powder under inert conditions to yield the corresponding reduced fluorinated perovskite. Upon fluorination, the B-site cations are reduced to yield a mixed valence. Electronic transport measurements on the air-stable RbLaNb2O6F reveal room temperature conductivity (195 Ω·cm) via a 2D/E-S variable range hopping mechanism, while the material still retains its capacity for cation exchange/intercalation.
