中文版 | English
Title

Two-Dimensional Hybrid Dion-Jacobson Germanium Halide Perovskites

Author
Corresponding AuthorCanepa,Pieremanuele; Mao,Lingling
Publication Years
2023
DOI
Source Title
ISSN
0897-4756
EISSN
1520-5002
Abstract

Hybrid two-dimensional (2D) halide perovskites have emerged as an important class of high-performance semiconductors because of their excellent physical properties and structural diversity. Here, we report a new family of hybrid 2D Ge-based perovskites that have the Dion-Jacobson structure type, with the general formula A(MA)GeX, where A = 2-(aminomethyl)pyridinium (2AMPY), 3-(aminomethyl)pyridinium (3AMPY), 4-(aminomethyl)pyridinium (4AMPY), or 4-(aminomethyl)piperidinium (4AMP), X = Br or I, and n = 1 or 2. Single-crystal X-ray diffraction shows that most of the bromide structures are centrosymmetric, whereas the iodide analogues are all non-centrosymmetric. The optical band gaps are effectively regulated by the level of octahedral distortion of the corresponding [GeX], where a larger distortion corresponds to a larger band gap. These compounds exhibit relatively weak photoluminescence, which can be observed at low temperatures. All of the Ge-based iodide perovskites exhibit good second-harmonic generation (SHG) responses, with the highest reaching 0.53 × AgGaS for (4AMPY)GeI, where their particle-dependent SHG has been investigated. First-principles calculations of the SHG properties are in good agreement with the experimental results. Furthermore, layer transformation can be achieved from the (100)- to (110)-oriented configuration by mixing the halides, which is a rare example. These results showcase the versatility and diversity of employing an asymmetric dication and the Ge metal to achieve SHG active non-centrosymmetric materials, providing new strategies for the design of lead-free alternatives with interesting photophysical properties.

URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
ESI Research Field
MATERIALS SCIENCE
Scopus EID
2-s2.0-85152201125
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/524225
DepartmentDepartment of Chemistry
生命科学学院
生命科学学院_生物系
Affiliation
1.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
2.Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,Fujian,350002,China
3.MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,School of Chemistry,Sun Yat-Sen University,Guangzhou,510275,China
4.Department of Chemistry and Energy Institute,The Hong Kong University of Science and Technology,Kowloon,SAR),999077,Hong Kong
5.Department of Biology,School of Life Sciences,Southern University of Science and Technology,Shenzhen,518055,China
6.Department of Chemical and Biomolecular Engineering,National University of Singapore,117585,Singapore
7.Department of Materials Science and Engineering,National University of Singapore,117575,Singapore
First Author AffilicationDepartment of Chemistry
Corresponding Author AffilicationDepartment of Chemistry
First Author's First AffilicationDepartment of Chemistry
Recommended Citation
GB/T 7714
Chen,Congcong,Zhao,Xin,Gong,Yaping,et al. Two-Dimensional Hybrid Dion-Jacobson Germanium Halide Perovskites[J]. Chemistry of Materials,2023.
APA
Chen,Congcong.,Zhao,Xin.,Gong,Yaping.,Liu,Yang.,Chen,Zhongwei.,...&Mao,Lingling.(2023).Two-Dimensional Hybrid Dion-Jacobson Germanium Halide Perovskites.Chemistry of Materials.
MLA
Chen,Congcong,et al."Two-Dimensional Hybrid Dion-Jacobson Germanium Halide Perovskites".Chemistry of Materials (2023).
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