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Vol. 17 (2025)

Face-/Edge-Shared 3D Perovskitoid Single Crystals with Suppressed Ion Migration for Stable X-Ray Detector

https://doi.org/10.1007/s40820-025-01788-z
Zimin Zhang
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Future Technology, Henan University, Zhengzhou 450046, People’s Republic of China
Xiaoli Wang
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People’s Republic of China
Huayang Li
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Future Technology, Henan University, Zhengzhou 450046, People’s Republic of China
Dong Li
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People’s Republic of China
Yang Zhang
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People’s Republic of China
Nan Shen
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Future Technology, Henan University, Zhengzhou 450046, People’s Republic of China
Xue‑Feng Yu
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People’s Republic of China
Yucheng Liu
Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, National Ministry of Education, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
Shengzhong Liu
Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, National Ministry of Education, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
Haomin Song
Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau, SAR 999078, People’s Republic of China
Yanliang Liu
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People’s Republic of China
Xingzhu Wang
School of Electrical Engineering, University of South China, Hengyang 421001, People’s Republic of China
Shi Chen
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Future Technology, Henan University, Zhengzhou 450046, People’s Republic of China

Corresponding Author: Shi Chen

chenshi@henu.edu.cn

Nano-Micro Letters, Vol. 17 (2025), Article Number: 310

Abstract

Although three-dimensional metal halide perovskites are promising candidates for direct X-ray detection, the ion migration of perovskites seriously affects the detector stability. Herein, face-/edge-shared 3D heterometallic glycinate hybrid perovskitoid Pb2CuGly2X4 (Gly = -O2C-CH2-NH2; X = Cl, Br) single crystals (SCs), in which the adjacent lead halide layers are linked by large-sized Cu(Gly)2 pillars, are synthesized in water. The Cu(Gly)2 pillars in combination with face-/edge-shared inorganic skeleton are found able to synergistically suppress the ion migration, delivering a high ion migration activation energy (Ea) of 1.06 eV. The Pb2CuGly2Cl4 SC X-ray detector displays extremely low dark current drift of 1.20 × 10–9 nA mm−1 s−1 V−1 under high electric field (120 V mm−1) and continuous X-ray irradiation (2.86 Gy), and a high sensitivity of 9,250 μC Gy−1 cm−2 is also achieved. More excitingly, the Pb2CuGly2Cl4 nanocrystal can be easily dispersed in water and directly blade-coated on thin-film transistor (TFT) array substrate, and the obtained Pb2CuGly2Cl4-based TFT array detector offers an X-ray imaging capability with spatial resolution of 2.2 lp mm−1.


Highlights:
1 3D perovskitoid Pb2CuGly2X4 (Gly = -O2C-CH2-NH2; X = Cl, Br) single crystals (SCs) with face-/edge-shared inorganic skeleton and CuGly2 pillars delivered a high ion migration activation energy of 1.06 eV.
2 The Pb2CuGly2Cl4 SC X-ray det  cector presented low dark current drift (1.20 × 10–9 nA mm−1 s−1 V−1 at 120 V mm−1) and high sensitivity (9250 μC Gy−1 cm−2).
3 The Pb2CuGly2Cl4 film-based thin-film transistor array detector offered an X-ray imaging capability with spatial resolution of 2.2 lp mm−1.

Keywords

3D perovskitoid Single crystals Suppressed ion migration High operating stability X-ray detector
Zhang, Zimin, Xiaoli Wang, Huayang Li, Dong Li, Yang Zhang, Nan Shen, Xue‑Feng Yu, Yucheng Liu, Shengzhong Liu, Haomin Song, Yanliang Liu, Xingzhu Wang, and Shi Chen. 2025. “Face-/Edge-Shared 3D Perovskitoid Single Crystals With Suppressed Ion Migration for Stable X-Ray Detector”. Nano-Micro Letters 17 (June):310. https://doi.org/10.1007/s40820-025-01788-z.
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