Layered metal-organic chalcogenide thin films for flexible and large-area X-ray direct detection

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]infinity, recently proposed as representative of a novel excitonic semiconductors platform. Here we demonstrate that [AgSePh]infinity can be successfully applied as direct ionizing radiation detecting layer, reaching sensitivities up to (180 +/- 10) mu C 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.