Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannate

Szafrański, Marek; Ståhl, Kenny

doi:10.1103/physrevb.62.8787

Cited by 12 publications

(12 citation statements)

References 13 publications

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“…67,72,73 Our single-crystal diffraction data for CsPb 2 Br 5 are consistent with a powder diffraction pattern reported in ref 70 and in PDF2 (#00-025-0211). [C(NH 2 ) 3 ] 2 PbBr 4 (IX, Figure S3a) crystallizes in the triclinic P1̅ space group with a structural motif similar to that of [C(NH 2 ) 3 ] 2 SnCl 4 , as reported by Szafranśki et al 74 [C(NH 2 ) 3 ] 2 PbBr 4 consists of 1D chains of corner-sharing [PbBr 5 ] square pyramids, wherein the coordination number of Pb(II) is 6, including the lone 6s 2 pair of electrons. The guanidinium cations are located between the inorganic chains and form hydrogen−halogen bonds, resulting in a 3D supramolecular structure.…”

Section: ■ Methodssupporting

confidence: 58%

Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

et al. 2017

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Interest in hybrid organic-inorganic lead halide compounds with perovskite-like two-dimensional crystal structures is growing due to the unique electronic and optoelectronic properties of these compounds. Herein, we demonstrate the synthesis, thermal and optical properties, and calculations of the electronic band structures for one- and two-layer compounds comprising both cesium and guanidinium cations: Cs[C(NH)]PbI (I), Cs[C(NH)]PbBr (II), and Cs[C(NH)]PbBr (III). Compounds I and II exhibit intense photoluminescence at low temperatures, whereas compound III is emissive at room temperature. All of the obtained substances are stable in air and do not thermally decompose until 300 °C. Since Cs and C(NH) are increasingly utilized in precursor solutions for depositing polycrystalline lead halide perovskite thin films for photovoltaics, exploring possible compounds within this compositional space is of high practical relevance to understanding the photophysics and atomistic chemical nature of such films.

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Section: ■ Methodssupporting

confidence: 58%

Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

et al. 2017

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“…1D zigzag chains are also observed in (GA) 2 SnBr 4 and (GA) 2 SnCl 4 , however, square pyramidal tin halide cages are formed instead of octahedral tin halide cages. [ 121,122 ] These structures are highly different compared to the iodine variant and illustrate the profound impact of the halides on the structure. An exotic 〈330〉‐type structure could be obtained by using pentanediammonium as the organic cation.…”

Section: Low‐dimensional Layered Perovskitesmentioning

confidence: 99%

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

et al. 2021

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Metal halide perovskites have unique optical and electrical properties, which make them an excellent class of materials for a broad spectrum of optoelectronic applications. However, it is with photovoltaic devices that this class of materials has reached the apotheosis of popularity. High power conversion efficiencies are achieved with lead‐based compounds, which are toxic to the environment. Tin‐based perovskites are the most promising alternative because of their bandgap close to the optimal value for photovoltaic applications, the strong optical absorption, and good charge carrier mobilities. Nevertheless, the low defect tolerance, the fast crystallization, and the oxidative instability of tin halide perovskites currently limit their efficiency. The aim of this review is to give a detailed overview of the crystallographic, photophysical, and optoelectronic properties of tin‐based perovskite compounds in their multiple forms from 3D to low‐dimensional structures. At the end, recent progress in tin‐based perovskite solar cells are reviewed, mainly focusing on the detail of the strategies adopted to improve the device performances. For each subtopic, the current challenges and the outlook are discussed, with the aim to stimulate the community to address the most important issues in a concerted manner.

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“…(100)-layered 2D perovskites are most common and adopt K 2 NiF 4 or RbAlF 4 crystal structure. As to (110)-2D LHPs (Ca 2 Nb 2 O 7 related phases), some known examples of A-cations include N -(3-aminopropyl)imidazolium [in (C 6 H 13 N 3 )PbBr 4 ], N 1 -methylethane-1,2-diammonium [N-MEDA, in (N-MEDA)PbBr 4 ], as well as guanidinium [C(NH 2 ) 3 + , G, in G 2 PbI 4 ] . An example of (111)-layered 2D LHP is the one comprising 3-(aminomethyl)pyridinium [(H 2 3-AMP) 2+ ], such as in (H 2 3-AMP) 2 PbBr 6 with K 2 PtCl 6 type structure .…”

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confidence: 99%

“…( 100 + , G, in G 2 PbI 4 ]. 6 An example of (111)-layered 2D LHP is the one comprising 3-(aminomethyl)pyridinium [(H 2 3-AMP) 2+ ], such as in (H 2 3-AMP) 2 PbBr 6 with K 2 PtCl 6 type structure. 7 (100)-2D LHPs are most commonly built with primary mono and diammonium cations.…”

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confidence: 99%

Guanidinium-Formamidinium Lead Iodide: A Layered Perovskite-Related Compound with Red Luminescence at Room Temperature

et al. 2018

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Two-dimensional hybrid organic–inorganic lead halides perovskite-type compounds have attracted immense scientific interest due to their remarkable optoelectronic properties and tailorable crystal structures. In this work, we present a new layered hybrid lead halide, namely [CH(NH2)2][C(NH2)3]PbI4, wherein puckered lead-iodide layers are separated by two small and stable organic cations: formamidinium, CH(NH2)2+, and guanidinium, C(NH2)3+. This perovskite is thermally stable up to 255 °C, exhibits room-temperature photoluminescence in the red region with a quantum yield of 3.5%, and is photoconductive. This study highlights a vast structural diversity that exists in the compositional space typically used in perovskite photovoltaics.

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Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannate

Cited by 12 publications

References 13 publications

Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

Guanidinium-Formamidinium Lead Iodide: A Layered Perovskite-Related Compound with Red Luminescence at Room Temperature

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