Heterogeneous Integration of Compact Perovskite Films on Pixelated Arrays via Solid‐State Crystal Growth for X‐Ray Imaging
Abstract Metal halide perovskites are promising candidates for direct X‐ray imaging, but their heterogeneous integration with pixelated sensing arrays remains challenging. Herein, a novel solid‐state crystal growth strategy to integrate high‐quality perovskites with the pixelated electrode substrate for X‐ray imaging is described, and the soft methylammonium lead triiodide solvate (MAPbI 3 •DMF) powder is utilized as precursor and is soft‐pressed directly on the thin film transistor (TFT) array at moderate pressure and temperature (100 °C, 0.8 MPa) instead of common perovskite suspension printing. A compact and dense MAPbI 3 thick film is obtained with excellent mobility‐lifetime ( µτ ) of 1.92 × 10 −3 cm 2 •V −1 . The X‐ray detector shows a high sensitivity of 40,970 µC•Gy air −1 •cm −2 and a low detection limit of 14.3 nGy air •s −1 . In addition, the TFT perovskite X‐ray flat‐panel exhibits a well‐distributed pixel response and high spatial resolution of 0.6 lp•pixel −1 for X‐ray imaging.
Authors
- Xingchen He (ORCID: https://orcid.org/0000-0001-9136-7913)
- Paul Kim-Ho Chu (ORCID: https://orcid.org/0000-0002-5581-4883)
- Zhiyuan Liu (ORCID: https://orcid.org/0000-0002-4943-6572)
- Yang Zhang (ORCID: https://orcid.org/0000-0003-4797-1915)
- Xiaoli Wang (ORCID: https://orcid.org/0000-0003-3136-9807)
- Dong Li (ORCID: https://orcid.org/0000-0001-7197-1240)
- Xue‐Feng Yu
- Yanliang Liu (ORCID: https://orcid.org/0000-0002-0952-4535)
- Tongyu Shi
- Jie Kang (ORCID: https://orcid.org/0009-0003-7116-1215)
- Xingzhou Su
- Wenxuan Yang (ORCID: https://orcid.org/0009-0005-8006-9757)
Institutions
- City University of Hong Kong (HK)
- Chinese Academy of Sciences (CN)
- Shenzhen Institutes of Advanced Technology (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Advanced Functional Materials
- Published
- 2025-04-09
- DOI
- https://doi.org/10.1002/adfm.202421569
- Citations
- 4
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.92
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China
- Shenzhen Science and Technology Innovation Program
- Basic and Applied Basic Research Foundation of Guangdong Province