A Narrow Bandgap of 2D Ruddlesden‐Popper Bilayer Perovskite with Giant Entropy Change and Photoluminescence

Zhuang, Jiawei; Wei, Wenjuan; Song, Ning; Tang, Yun‐Zhi; Tan, Yu‐Hui; Han, Ding-Chong; Li, Yu-kong

doi:10.1002/chem.202102550

Cited by 14 publications

(11 citation statements)

References 31 publications

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“…These compactly arranged polyhedra form an extremely dense inorganic network, giving 1 a high density of 3.84 g cm −3 . This value is higher than those of almost all low-dimensional OILHs, such as (Iodopropylamine) 2 FAPb 2 I 7 (3.66 g cm −3 ), [14] (Iodoethylamine) 2 PbI 4 (3.64 g cm −3 ), [15] (Iodopropylamine) 4 AgBiI 8 (3.51 g cm −3 ), [16] and even 3D MAPbCl 3 (3.12 g cm −3 ) and FAPbCl 3 (3.15 g cm −3 ). [17] The presence of high Z and heavy Pb element along with the high density thus awards 1 promising X-ray attenuation ability and great potential for X-ray detection and imaging.…”

Section: Crystal and Electronic Structuresmentioning

confidence: 65%

Exploring a Stable and Dense 3D Lead Chloride Hybrid with Emission of Self‐Trapped Excitons toward X‐Ray Scintillation

You

Zhu

Wang

et al. 2022

Adv Funct Materials

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The exceptional photophysical properties of 3D organic–inorganic lead halide hybrids (OILHs) endow their significant potential for usage in optoelectronics, which has sparked intense research on novel 3D OILHs and associated applications. However, constructing new 3D OILHs based on large organic cations suffers from tough challenges due to the limitation of the Goldschmidt tolerance factor rule, let alone further explorations of their practical applications. Herein, a brand‐new 3D lead chloride hybrid, (1MPZ)Pb4Cl10·H2O (1, 1MPZ = 1‐methylpiperazine) is reported, featuring a dense 3D lead chloride framework made of the corner‐, edge‐, and face‐shared lead chloride polyhedra. 1 presents a broadband white light emission with a large Stokes shift and a nanosecond photoluminescence lifetime, which originates from radiative recombination of self‐trapped excitons (STEs) induced by the highly distorted structure. Such a reabsorption‐free and fast‐decayed STEs emission coupling with the dense 3D architecture further enables 1 with effective X‐ray scintillation with good sensitivity. Impressively, 1 also shows superior environmental and radiation stability. This study provides a new 3D OILH with appealing luminescence, not only expanding the 3D OILH family but also inspiring the exploitation of their optoelectronic applications.

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Section: Crystal and Electronic Structuresmentioning

confidence: 65%

Exploring a Stable and Dense 3D Lead Chloride Hybrid with Emission of Self‐Trapped Excitons toward X‐Ray Scintillation

You

Zhu

Wang

et al. 2022

Adv Funct Materials

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“…As shown in the Supporting Information (Figure S5a–d), VB is caused by the negative density of states of the Cl 3p and Fe 3d orbitals, while CB is caused by the Cl 3p and C 2p orbitals. It is worth noting that there is an obvious identical curve between C 2p and H 1s, especially in CB, which indicates the C–H bond . This narrow band gap 0D Fe-based perovskite material is rarely reported at present, which provides a new idea for the development of semiconductor field.…”

Section: Resultsmentioning

confidence: 90%

High-Tc Quadratic Nonlinear Optical and Dielectric Switchings in Fe-Based Plastic Crystalline Ferroelectric

et al. 2022

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Plastic crystals, as a molecular material with multiple functions, have become a research hotspot in the exploration of new ferroelectric crystal compounds, especially due to their unique solid−solid phase transition properties. Based on this, we synthesized a new 0D organic−inorganic hybrid Fe-based plastic ferroelectric [(CH 3 ) 3 NCH 2 CHCH 2 ]FeCl 4 (1), which has a hightemperature phase transition point of 393 K, obvious ferroelectric domains, and spontaneous polarization and has been tested by dielectric and piezoelectric power microscopy (PFM) and ultraviolet absorption (UV−vis). At room temperature, it crystallizes in the space group Cmc2 1 and has an obvious SHG switch. In addition, compound 1 also has an optical narrow band gap of 2.45 eV, indicating that compound 1 is a high-quality semiconductor material. This work advances the development of plastic ferroelectrics and provides an avenue for exploring the frequency-doubling response and optoelectronic properties of high-temperature plastic ferroelectrics.

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“…Crystallographic analysis can provide detailed microscopic crystal structure information, helping researchers gain a deeper understanding of the relationship between structure and performance. − Single-crystal X-ray diffraction revealed that both 1-R and 1-S crystallized at 298 K in the orthorhombic space group P 2 1 2 1 2 1 (the point group 222) with the following cellular parameters (Tables S1): 1-R : a = 9.2762(5) Å, b = 10.4088(6) Å, c = 11.1881(6) Å, α = γ = β = 90.0°, V = 1080.26(10) Å 3 ; 1-S : a = 9.2720(4) Å, b = 10.4241(5) Å, c = 11.2026(5) Å, α = γ = β = 90.0°, and V = 11082.76(8) Å 3 . Tables S2 and S3 present the bond length and angle.…”

Section: Resultsmentioning

confidence: 99%

Organic Single-Component Enantiomers with High Phase Transition Temperatures and Dielectric Switching Properties

Ying

Tang

Tan

et al. 2022

Crystal Growth & Design

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Homochirality enables molecules to exhibit many specific physical properties, but single-component homochiral enantiomers with hightemperature reversible phase transitions and excellent dielectric switching properties are rarely reported. Here, we report a pair of single-component organic enantiomeric phase transition materials (R and S)-10,2-camphorsultams (1-R and 1-S). The two enantiomers display very similar physical and chemical properties, including structural phase transition temperatures up to 390 K, steplike dielectric anomalies from 2 to 8, and flexible dielectric switching properties. Homochiral (R and S)-10,2-camphorsultams (1-R and 1-S) crystallize at room temperature in polar point group 222, and the crystal structure and strong circular dichroism signal exhibit a clear mirror-image relationship. Furthermore, the intermolecular interactions of 1-R and 1-S are discussed in detail by Hirshfeld surface analysis. This work will promote the development of highperformance organic single-component reversible plastic phase transition materials.

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A Narrow Bandgap of 2D Ruddlesden‐Popper Bilayer Perovskite with Giant Entropy Change and Photoluminescence

Cited by 14 publications

References 31 publications

Exploring a Stable and Dense 3D Lead Chloride Hybrid with Emission of Self‐Trapped Excitons toward X‐Ray Scintillation

Exploring a Stable and Dense 3D Lead Chloride Hybrid with Emission of Self‐Trapped Excitons toward X‐Ray Scintillation

High-Tc Quadratic Nonlinear Optical and Dielectric Switchings in Fe-Based Plastic Crystalline Ferroelectric

Organic Single-Component Enantiomers with High Phase Transition Temperatures and Dielectric Switching Properties

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