Cation-π interactions enabled water-stable perovskite X-ray flat mini-panel imager

Wanting Pan, Yuhong He, Weijun Li, Lulu Liu, Keke Guo, Jianglei Zhang, Chao Wang, Bao Li, Hu Huang, Junhu Zhang, Bai Yang and Haotong Wei ()
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Wanting Pan: Jilin University
Yuhong He: Jilin University
Weijun Li: Jilin University
Lulu Liu: Jilin University
Keke Guo: Jilin University
Jianglei Zhang: Jilin University
Chao Wang: Jilin University
Bao Li: Jilin University
Hu Huang: Jilin University
Junhu Zhang: Jilin University
Bai Yang: Jilin University
Haotong Wei: Jilin University

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Sensitive and stable perovskite X-ray detectors are attractive in low-dosage medical examinations. The high sensitivity, tunable chemical compositions, electronic dimensions, and low-cost raw materials make perovskites promising next-generation semiconductors. However, their ionic nature brings serious concerns about their chemical and water stability, limiting their applications in well-established technologies like crystal polishing, micro-processing, photolithography, etc. Herein we report a one-dimensional tryptamine lead iodide perovskite, which is stable in water for several months as the strong cation-π interactions between organic cations. The one-dimensional and two-dimensional tryptamine lead iodide perovskite tablets are switchable through thermal-annealing or water-soaking treatments to relax microstrains. The water-stable and microstrain-free one-dimensional perovskite tablets yield a large sensitivity of 2.5 × 106 μC Gyair−1 cm−2 with the lowest detectable dose rate of 5 nGyair s−1. Microelectrode arrays are realized by surface photolithography to construct high-performance X-ray flat mini-panels with good X-ray imaging capability, and a record spatial resolution of 17.2 lp mm−1 is demonstrated.

Date: 2024
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DOI: 10.1038/s41467-023-44644-7

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