Dual lattice incommensurabilities and enhanced lattice perfection by low-temperature thermal annealing in photoelectric 
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Li, Wen Hsien; Lee, Chi Hung; Ling, Tsu Yin; Hsuan, Ma; Wei, Pai‐Chun; He, Jr Hau; Wu, Chun Min; Peng, Jen Chih; Xu, Guangyong; Zhao, Yang; Lynn, J. W.

doi:10.1103/physrevmaterials.5.025401

Phys. Rev. Materials

2021

DOI: 10.1103/physrevmaterials.5.025401

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Dual lattice incommensurabilities and enhanced lattice perfection by low-temperature thermal annealing in photoelectric (CH3NH3)PbBr3

Wen Hsien Li

Chi Hung Lee

Tsu Yin Ling

et al.

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Cited by 4 publications

References 32 publications

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Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Papadopoulos,

Forslund,

Cottrell

et al. 2024

Advanced Physics Research

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Hybrid organic–inorganic perovskites (HOIPs) are promising candidates for next‐generation photovoltaic materials. However, there is a debate regarding the impact of interactions between the organic center and the surrounding inorganic cage on the solar cell's high diffusion lengths. It remains unclear whether the diffusion mechanism is consistent across various halide perovskite families and how light illumination affects carrier lifetimes. The focus is on ion kinetics of (CH3NH3)PbX3 (X = Br, Cl) perovskite halide single crystals. Muon spectroscopy (μ+SR)is employed to investigate the fluctuations and diffusion of ions via the relaxation of muon spins in local nuclear field environments. Within a temperature range of 30–340 K, ion kinetics are studied with and without white‐light illumination. The results show a temperature shift of the tetragonal‐orthorhombic phase transition on the illuminated samples, as an effect of increased organic molecule fluctuations. This relation is supported by density functional theory (DFT) calculations along the reduction of the nuclear field distribution width between the phase transitions. The analysis shows that, depending on the halide ion, the motional narrowing from H and N nuclear moments represents the molecular fluctuations. The results demonstrate the importance of the halide ion and the effect of illumination on the compound's structural stability and electronic properties.

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Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Papadopoulos,

Forslund,

Cottrell

et al. 2024

Advanced Physics Research

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Dual Crystal‐Liquid Thermal Transport Behavior in MAPbCl₃

Hu,

Lee,

et al. 2024

Small

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Phonon dynamics in organic–inorganic hybrid perovskites (OIHPs) exhibit inherent complexity driven by the intricate interactions between rotatable organic cations and dynamically disordered inorganic octahedra, mediated by hydrogen bonding. This study aims to address this complexity by investigating the thermal transport behavior of MAPbCl3 as a gateway to the OIHPs family. The results reveal that the ultralow thermal conductivity of MAPbCl3 arises from a synergistic interplay of exceptionally low phonon velocities, short phonon lifetimes, and phonon mean free paths approaching the Regel‐Ioffe limit. Additionally, the thermal conductivity of MAPbCl3 approaches its theoretical amorphous limit across a broad temperature range, with its thermal transport behavior transitioning from crystal‐like to more liquid‐like during the orthorhombic‐to‐cubic phase transitions. Furthermore, a phonon drag effect is observed at 17 K, with Umklapp scattering serving as the predominant phonon resistive mechanism in the orthorhombic phase. In contrast, dynamic lattice distortions caused by the jumping rotation of MA+ cations become the primary factors influencing thermal transport in the cubic phase.

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Unveiling the ultralow in-plane thermal conductivity in 2D organic–inorganic hybrid perovskite (EA)₂PbI₄ single crystals

Wei,

Aktar,

et al. 2024

J. Mater. Chem. A

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Dual lattice incommensurabilities and enhanced lattice perfection by low-temperature thermal annealing in photoelectric (CH3NH3)PbBr3

Cited by 4 publications

References 32 publications

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Dual Crystal‐Liquid Thermal Transport Behavior in MAPbCl₃

Unveiling the ultralow in-plane thermal conductivity in 2D organic–inorganic hybrid perovskite (EA)₂PbI₄ single crystals

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Dual lattice incommensurabilities and enhanced lattice perfection by low-temperature thermal annealing in photoelectric (CH3NH3)PbBr3

Cited by 4 publications

References 32 publications

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX3 (X=Br, Cl) Single Crystals

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX3 (X=Br, Cl) Single Crystals

Dual Crystal‐Liquid Thermal Transport Behavior in MAPbCl3

Unveiling the ultralow in-plane thermal conductivity in 2D organic–inorganic hybrid perovskite (EA)2PbI4 single crystals

Contact Info

Product

Resources

About

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Photophysical Ion Dynamics in Hybrid Perovskite MAPbX₃ (X=Br, Cl) Single Crystals

Dual Crystal‐Liquid Thermal Transport Behavior in MAPbCl₃

Unveiling the ultralow in-plane thermal conductivity in 2D organic–inorganic hybrid perovskite (EA)₂PbI₄ single crystals