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Dual-site mixed layer-structured FA _x Cs_3-x Sb₂I₆Cl₃ Pb-free metal halide perovskite solar cells.

ABSTRACT: Structure engineering of trivalent metal halide perovskites (MHPs) such as A₃Sb₂X₉ (A = a monovalent cation such as methyl ammonium (MA), cesium (Cs), and formamidinium (FA) and X = a halogen such as I, Br, and Cl) is of great interest because a two dimensional (2D) layer structure with direct bandgap has narrower bandgap energy than a zero dimensional (0D) dimer structure with indirect bandgap. Here, we demonstrated 2D layer structured FACs₂Sb₂I₆Cl₃ MHP by dual-site (A and X site) mixing. Thanks to the lattice-symmetry change by I-Cl mixed halide, the shortest ionic radius of Cs, and the lower solution energy due to dual-site mixing, the FACs₂Sb₂I₆Cl₃ MHP had 2D layer structure and thereby the MHP solar cells exhibited improved short-circuit current density.

SUBMITTER: Choi YK

PROVIDER: S-EPMC9053595 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Dual-site mixed layer-structured FA x Cs3-x Sb2I6Cl3 Pb-free metal halide perovskite solar cells.

Choi Yong Kyu YK Heo Jin Hyuck JH Hong Ki-Ha KH Im Sang Hyuk SH

RSC advances 20200506 30

Structure engineering of trivalent metal halide perovskites (MHPs) such as A3Sb2X9 (A = a monovalent cation such as methyl ammonium (MA), cesium (Cs), and formamidinium (FA) and X = a halogen such as I, Br, and Cl) is of great interest because a two dimensional (2D) layer structure with direct bandgap has narrower bandgap energy than a zero dimensional (0D) dimer structure with indirect bandgap. Here, we demonstrated 2D layer structured FACs2Sb2</ ...[more]

PMID: 35515599

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