Jul 3 – 7, 2023
Facultat de Física
Europe/Madrid timezone

Perovskite solution-grown crystals directly integrated to readout interface for high spatial resolution X-ray imaging

Jul 3, 2023, 4:35 PM
1h 25m
Facultat de Física

Facultat de Física

Martí i Franqués, 1 08028 Barcelona
Contributed e-poster

Description

Hybrid lead halide perovskites are a promising candidate for a new generation of highly sensitive direct-converting detectors for medical X-ray imaging. While the usage of existing semiconductor materials such as CdTe and Si is complicated by fabrication processes and their costs, highly-crystalline hybrid lead halide perovskite active layers can be deposited on read-out array backplanes directly by solution growth. Here we present thick and uniform methylammonium lead iodide single-crystal films, solution-grown directly on hole-transporting electrode arrays. Electrodes are created on a glass substrate with patterned Indium Tin Oxide (ITO) layer, providing direct integration with the interface of external read-out electronics. Accordingly, stable MAPbI3 X-ray detectors have been made with obtained 88% detection efficiency and 90 pGyair noise equivalent dose under 18 keV X-rays in photovoltaic mode, demonstrating high spatial resolution up to 11 lp mm-1.

Primary author

Vitalii Bartosh (Department of Chemistry and Applied Biosciences, ETH Zurich)

Co-authors

Anastasiia Sakhatska (ETH Zurich) Mr Bekir Turedi (Department of Chemistry and Applied Biosciences, ETH Zurich) Mr Erfu Wu (Laboratory for Thin Films and Photovoltaics, Empa) Dr Gebhard J. Matt (Department of Chemistry and Applied Biosciences, ETH Zurich) Dr Ivan Shorubalko (Laboratory for Transport at Nanoscale Interfaces, Empa) Kostiantyn Sakhatskyi (ETH Zurich) Prof. Maksym V. Kovalenko (Department of Chemistry and Applied Biosciences, ETH Zurich) Mr Muhammad Naufal Lintangpradipto (Division of Physical Sciences and Engineering, KAUST) Prof. Omar F. Mohammed (Division of Physical Sciences and Engineering, KAUST) Prof. Osman M. Bakr (Division of Physical Sciences and Engineering, KAUST) Dr Rounak Naphade (Division of Physical Sciences and Engineering, KAUST) Dr Sergii Yakunin (Department of Chemistry and Applied Biosciences, ETH Zurich)

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