Impact of two diammonium cations on the structure and photophysics of layered Sn-based perovskites

Abstract

Layered metal-halide perovskites have shown great promise for applications in optoelectronic devices, where a large number of suitable organic cations give the opportunity to tune their structural and optical properties....

Origin of Broad Emission Induced by Rigid Aromatic Ditopic Cations in Low-Dimensional Metal Halide Perovskites

“…36 Even more interestingly, broadband white light emission has been observed in (N-MEDA)PbBr 4 (N-MEDA = N 1 -methylethane-1,2-diammonium) and (EDBE)PbX 4 (EDBE = 2,2′-(ethylenedioxy)bis(ethylammonium); X = Cl, Br), as well as for its tin-based counterpart (EDBE)SnI 4 . 37,38 Recently, broadband emission was also observed in 2D lead bromide perovskites with ditopic aromatic cyclic cations, likely being correlated to the level of octahedral distortion. 30,39 Still, the spectrum of available 2D MHPs with diammonium spacers remains limited with respect to their monoammonium counterparts.…”