Title
High-sensitivity high-resolution X-ray imaging with soft-sintered metal halide perovskites
Author
Deumel, S.
van Breemen, A.J.J.M.
Gelinck, G.
Peeters, B.
Maas, J.
Verbeek, R.
Shanmugam, S.
Akkerman, H.
Meulenkamp, E.
Huerdler, J.E.
Acharya, M.
García-Batlle, M.
Publication year
2021
Abstract
To realize the potential of artificial intelligence in medical imaging, improvements in imaging capabilities are required, as well as advances in computing power and algorithms. Hybrid inorganic–organic metal halide perovskites, such as methylammonium lead triiodide (MAPbI3), offer strong X-ray absorption, high carrier mobilities (μ) and long carrier lifetimes (τ), and they are promising materials for use in X-ray imaging. However, their incorporation into pixelated sensing arrays remains challenging. Here we show that X-ray flat-panel detector arrays based on microcrystalline MAPbI3 can be created using a two-step manufacturing process. Our approach is based on the mechanical soft sintering of a freestanding absorber layer and the subsequent integration of this layer on a pixelated backplane. Freestanding microcrystalline MAPbI3 wafers exhibit a sensitivity of 9,300 μC Gyair –1 cm–2 with a μτ product of 4 × 10–4 cm2 V–1, and the resulting X-ray imaging detector, which has 508 pixels per inch, combines a high spatial resolution of 6 line pairs per millimetre with a low detection limit of 0.22 nGyair per frame.
Subject
Carrier mobility
Hybrid materials
Lead compounds
Medical imaging
Perovskite
Sintering
X ray absorption
Industrial Innovation
To reference this document use:
http://resolver.tudelft.nl/uuid:b6f57cb3-35bf-4fa2-8f43-4971385ce468
DOI
https://doi.org/10.1038/s41928-021-00644-3
TNO identifier
959129
Publisher
Nature Research
ISSN
2520-1131
Source
Nature Electronics, 4 (4), 681-688
Document type
article