High Efficiency MAPbI Perovskite Solar Cell Using a Pure Thin Film of Polyoxometalate as Scaffold Layer.

Here, we successfully used a pure layer of [SiW O ] polyoxomethalate (POM) structure as a thin-film scaffold layer for CH NH PbI -based perovskite solar cells (PSCs). A smooth nanoporous surface of POM causes outstanding improvement of the photocurrent density, external quantum efficiency (EQE), and overall efficiency of the PSCs compared to mesoporous TiO (mp-TiO ) as scaffold layer. Average power conversion efficiency (PCE) values of 15.

(E,E)-N,N-Bis(2,6-difluoro-benzyl-idene)butane-1,4-diamine.

The asymmetric unit of the title compound, C(18)H(16)F(4)N(2), comprises two half crystallographically independent potentially bidentate Schiff base ligands, with an inversion centre located at the mid-point of the central C-C bond. The crystal packing is stabilized by inter-molecular C-H⋯F and π-π inter-actions [centroid-centroid distance = 3.8283 (11) Å].

(E,E)-N,N-Bis(2,6-difluoro-benzyl-idene)ethane-1,2-diamine.

The asymmetric unit of the title compound, C(16)H(12)F(4)N(2), comprises half of the potentially bidentate Schiff base ligand, with an inversion centre located at the mid-point of the central C-C bond. The crystal packing is stabilized by inter-molecular C-H⋯N and π-π inter-actions [centroid-centroid distance = 3.6793 (12) Å and inter-planar spacing = 3.