Origami-inspired perovskite X-ray detector by printing and folding

• Published in: Npj flexible electronics 2023-02, Vol.7 (1), p.9-8, Article 9
• Main Authors: Mescher, Henning, Schackmar, Fabian, Huber, Robert, Eggers, Helge, Zuber, Marcus, Hamann, Elias, Gramlich, Georg, Dangelmaier, Julian, Zhang, Qiaoshuang, Rösch, Andres Georg, Zwick, Thomas, Hernandez-Sosa, Gerardo, Paetzold, Ulrich W., Lemmer, Uli
• Format: Article
• Language: English
• Subjects: 639/166/987; 639/301/1005; 639/624/1111; 639/766/1130; Chemistry and Materials Science; Electronics and Microelectronics; Instrumentation; Materials Science; Optical and Electronic Materials; Perovskites; Photolithography; Polymer Sciences; Sensitivity; Sensor arrays; Sensors; Spatial resolution; X ray detectors
• ISSN: 2397-4621; 2397-4621
• DOI: 10.1038/s41528-023-00240-9

X-ray detectors are of pivotal importance for the scientific and technological progress in a wide range of medical, industrial, and scientific applications. Here, we take advantage of the printability of perovskite-based semiconductors and achieve a high X-ray sensitivity combined with the potential of an exceptional high spatial resolution by our origami-inspired folded perovskite X-ray detector. The high performance of our device is reached solely by the folded detector architecture and does not require any photolithography. The design and fabrication of a foldable perovskite sensor array is presented and the detector is characterized as a planar and as a folded device. Exposed to 50 kVp−150 kVp X-ray radiation, the planar detector reaches X-ray sensitivities of 25−35  μ C/(Gy air cm 2 ), whereas the folded detector achieves remarkably increased X-ray sensitivities of several hundred μ C/(Gy air cm 2 ) and a record value of 1409  μ C/(Gy air cm 2 ) at 150 kVp without photoconductive gain. Finally, the potential of an exceptional high spatial resolution of the folded detector of more than 20 lp/mm under 150 kVp X-ray radiation is demonstrated.