Issue 3, 2024

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

Abstract

In the field of perovskite solar cells (PSCs), 3D/2D heterostructures are promising candidates to obtain highly efficient and stable devices. Herein, inspired by dications that have afforded rare layered perovskites called Dion–Jacobson (DJ), with short interlayer distances, we designed and synthesized the new 2-iodopropane-1,3-diamonium dication (DicI), and we successfully obtained multi-n 2D layered perovskites (DicI)(MA)n−1PbnI3n+1 (n = 1–4, MA+ = methylammonium). As a result of a suitable size of the dication which fits well, in projection to the layer planes, in the square defined by four adjacent apical iodides, as well as halogen bonding between organic iodine and apical iodides (I(ap)) of perovskite layers, a perfect eclipsed configuration between adjacent layers takes place, yielding unprecedented short I(ap)⋯I(ap) distances, as small as 3.882 Å in (DicI)(MA)2Pb3I10. Density functional theory (DFT) calculations highlight unusually strong valence band dispersion along the ΓZ direction. Effective masses for out-of-plane motions of holes are estimated on par with values computed for 3D perovskites, and similar to in-plane effective masses in 2D multilayered perovskites. This indicates that these layered compounds feature quasi 3D electronic structures, hence appearing as promising candidates for PSC heterostructures.

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

Supplementary files

Article information

Article type
Paper
Submitted
18 Oct 2023
Accepted
30 Nov 2023
First published
30 Nov 2023

J. Mater. Chem. C, 2024,12, 1061-1068

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

M. Maniadi, N. Mercier, A. Skorokhod, M. Ben Haj Salah, P. Bidaud, P. Hudhomme, C. Quarti, W. Li, D. Beljonne, J. Even, C. Katan and C. C. Stoumpos, J. Mater. Chem. C, 2024, 12, 1061 DOI: 10.1039/D3TC03807F

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