AUTHOR=Fratelli Ilaria , Maserati Lorenzo , Basiricò Laura , Galeazzi Alessandro , Passarella Bianca , Ciavatti Andrea , Caironi Mario , Fraboni Beatrice TITLE=Layered metal-organic chalcogenide thin films for flexible and large-area X-ray direct detection JOURNAL=Frontiers in Physics VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1325164 DOI=10.3389/fphy.2023.1325164 ISSN=2296-424X ABSTRACT=

X-ray detection for personal dosimetry requires sensitive, stable and non-toxic materials. At the same time, scalability onto large-area and flexible substrates is emerging as a desirable property. To satisfy these requirements, novel materials to be employed as the active layer of direct X-ray detectors are needed. In this search for easy-processability, large area, efficient and non-toxic materials for direct X-ray detection, we assess the performance of a layered metal-organic chalcogenide [AgSePh]∞, recently proposed as representative of a novel excitonic semiconductors platform. Here we demonstrate that [AgSePh]∞ can be successfully applied as direct ionizing radiation detecting layer, reaching sensitivities up to (180 ± 10) μC Gy−1 cm−2 and competitive limit of detection down to (100 ± 30) nGy s−1. Moreover, it offers good stability and reproducibility of detection after 100 Gy of irradiation and upon bending to a curvature radius of 5 mm.