TY - JOUR

T1 - (3-CF3pyH)2(3-CF3py)Pb3I8: A Three-Dimensional Metal Halide Inorganic Framework with Distinctive Kagomé Bands

AU - Giappa, Rafaela M.

AU - Селиванов, Никита Иванович

AU - Самсонова, Анна Юрьевна

AU - Pantousas, Aposolos

AU - Remediakis, Ioannis N.

AU - Капитонов, Юрий Владимирович

AU - Емелин, Алексей Владимирович

AU - Kopidakis, Georgios

AU - Стомпос, Константинос

PY - 2024/12/24

Y1 - 2024/12/24

N2 - The structural diversity inherent in hybrid organic-inorganic metal halides as a function of the organic cation template can give access to numerous semiconducting materials featuring distinct polyhedral connectivity patterns. Beyond the common corner-sharing pattern of halide perovskites, different motifs can be accessed via the use of bulky and asymmetric templates, which can break the corner-sharing pattern. In this work, we report on the synthesis and characterization of a novel three-dimensional hybrid metal halide network, (3-CF3pyH)2(3-CF3py)Pb3I8, featuring a buckled decorated honeycomb lattice arising from the corner-connected arrangement of [Pb3I8]2- clusters. The compound is an indirect bandgap semiconductor with a bandgap of Eg = 2.6 eV that exhibits photoluminescence via a trap-assisted mechanism at 77 K. The inorganic cluster topology governs the electronic properties of the material, whereas the perovskite-like corner connectivity of the clusters gives rise to dispersive bands along certain crystallographic directions. The unprecedented appearance of distinctive Kagomé bands, emerging in the DFT calculated band structure of the idealized crystal structure, renders this material a promising candidate for advanced optoelectronic applications.

AB - The structural diversity inherent in hybrid organic-inorganic metal halides as a function of the organic cation template can give access to numerous semiconducting materials featuring distinct polyhedral connectivity patterns. Beyond the common corner-sharing pattern of halide perovskites, different motifs can be accessed via the use of bulky and asymmetric templates, which can break the corner-sharing pattern. In this work, we report on the synthesis and characterization of a novel three-dimensional hybrid metal halide network, (3-CF3pyH)2(3-CF3py)Pb3I8, featuring a buckled decorated honeycomb lattice arising from the corner-connected arrangement of [Pb3I8]2- clusters. The compound is an indirect bandgap semiconductor with a bandgap of Eg = 2.6 eV that exhibits photoluminescence via a trap-assisted mechanism at 77 K. The inorganic cluster topology governs the electronic properties of the material, whereas the perovskite-like corner connectivity of the clusters gives rise to dispersive bands along certain crystallographic directions. The unprecedented appearance of distinctive Kagomé bands, emerging in the DFT calculated band structure of the idealized crystal structure, renders this material a promising candidate for advanced optoelectronic applications.

UR - https://www.mendeley.com/catalogue/0659e95c-6093-322f-99c9-e7816390d090/

U2 - 10.1021/acs.chemmater.4c02076

DO - 10.1021/acs.chemmater.4c02076

M3 - Article

VL - 36

SP - 11804

EP - 11813

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 24

ER -