Volume 20, Issue 31 2400013
Research Article

Atomic Imaging of Multi-Dimensional Ruddlesden–Popper Interfaces in Lead-Halide Perovskites

Yusheng Liu

Yusheng Liu

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123 China

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Suya Liu

Suya Liu

Shanghai Nanoport, Thermo Fisher Scientific, Building A, No.2537, Jinke Road. Pudong District, Shanghai, China

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Liang Xu

Liang Xu

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123 China

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Mengmeng Ma

Mengmeng Ma

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123 China

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Xuliang Zhang

Xuliang Zhang

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123 China

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Xiao Chen

Xiao Chen

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 China

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Fei Wei

Fei Wei

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 China

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Bin Song

Bin Song

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123 China

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Tao Cheng

Tao Cheng

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123 China

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Jianyu Yuan

Corresponding Author

Jianyu Yuan

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123 China

E-mail: [email protected]; [email protected]

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Boyuan Shen

Corresponding Author

Boyuan Shen

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123 China

E-mail: [email protected]; [email protected]

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First published: 03 March 2024
Citations: 3

Abstract

Ruddlesden–Popper (RP) interface with defined stacking structure will fundamentally influence the optoelectronic performances of lead-halide perovskite (LHP) materials and devices. However, it remains challenging to observe the atomic local structures in LHPs, especially for multi-dimensional RP interface hidden inside the nanocrystal. In this work, the advantages of two imaging modes in scanning transmission electron microscopy (STEM), including high-angle annular dark field (HAADF) and integrated differential phase contrast (iDPC) STEM, are successfully combined to study the bulk and local structures of inorganic and organic/inorganic hybrid LHP nanocrystals. Then, the multi-dimensional RP interfaces in these LHPs are atomically resolved with clear gap and blurred transition region, respectively. In particular, the complex interface by the RP stacking in 3D directions can be analyzed in 2D projected image. Finally, the phase transition, ion missing, and electronic structures related to this interface are investigated. These results provide real-space evidence for observing and analyzing atomic multi-dimensional RP interfaces, which may help to better understand the structure-property relation of LHPs, especially their complex local structures.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.