Ultranarrow‐Spaced Polar Green Aromatic Dion–Jacobson Hybrid Perovskite Enables Highly Sensitive and Stable Self‐Powered X‐Ray Detection
Abstract
ABSTRACT Dion‐Jacobson (DJ) hybrid perovskites are considered as highly promising X‐ray detection materials due to their high stability and short interlayer spacing. However, the large‐scale commercial development of these materials is challenged due to severe ion migration at high voltage and lead toxicity. Here, we successfully obtained a DJ‐type polar lead‐free green hybrid perovskite (4AMPY) 2 AgBiBr 8 ( 1 ) by inserting 4‐aminomethylpyridine (4AMPY) aromatic diamine into 3D Cs 2 AgBiBr 6 , and achieved efficient and stable self‐powered X‐ray detection. Specifically, owing to the insertion of 4AMPY, 1 crystallizes in polar space group P 2 1 and exhibits a significant bulk photovoltaic effect. Additionally, strong hydrogen‐bonding interactions between 4AMPY and adjacent inorganic layers lead to an ultranarrow interlayer spacing of 3.09 Å. Meanwhile, the enhanced electron cloud density in aromatic diamines improves the charge transfer channel of 1 and enhances its X‐ray detection performance. Therefore, among all DJ‐type lead‐free hybrid perovskites, 1 achieves record‐breaking sensitivities of 661.4 and 9465.2 µC Gy −1 cm −2 at 0 and 100 V, respectively. Importantly, 1 exhibits excellent storage stability, with its sensitivity remaining at 97.5% (0 V) and 96.6% (100 V) of the initial value after three months. This work will greatly promote the development of polar DJ‐type lead‐free perovskite‐based self‐powered X‐ray detectors.
Article Details
Authors (12)
Huawei Yang
School of Chemistry and Materials Science
Lan Zhou
Engineering Research Center of Organosilicon Compounds and Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric OptoElectronic Materials, College of Chemistry and Molecular Sciences, The Institute for Advanced Studies, TaiKang Center for Life and Medical Sciences, and State Key Laboratory of Metabolism and Regulation in Complex Organisms
Jianbo Wu
Zeyu Chen
Panpan Yu
Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Province Key Laboratory of Porous Functional Materials College of Chemistry and Materials School of Chemical Engineering Jiangxi Normal University Nanchang P. R. China
Zeng‐Kui Zhu
Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Province Key Laboratory of Porous Functional Materials College of Chemistry and Materials School of Chemical Engineering Jiangxi Normal University Nanchang P. R. China
Haodong Ge
Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Province Key Laboratory of Porous Functional Materials College of Chemistry and Materials School of Chemical Engineering Jiangxi Normal University Nanchang P. R. China
Yueying Wang
Wenhui Wu
College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education
Ying Zeng
Hui‐Ping Xiao
Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated‐Materials Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy College of Chemistry Fuzhou University Fuzhou Fujian 350108 P.R. China
Junhua Luo
State Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter