Quasi 3D electronic structures of Dion–Jacobson layered perovskites with exceptional short interlayer distances

A new I-based (I (org) ) dication affords DJ layered perovskites exhibiting very short I (ap) ⋯I (ap) interlayer distances (<3.90 Å) and strong dispersion bands in the direction perpendicular to layers revealing a quasi 3D electronic structure.