Development of a Flexible X-Ray Imager Based on Metal Halide Perovskites

This work presents the design and preliminary characterization of flexible X-ray imager for large-area tomographic applications. Each pixel consists of methylammonium lead tri-iodide (MAPbI
3
) perovskite particles, acting as photoconductor deposited on top of interdigitated microelectrodes. Pixels are organized in arrays and individually addressed by commercial OFETs fabricated on a plastic backplane acting as matrix substrate. A demonstrator array of 4 by 4 pixels of 1 mm side is here presented. We report on the characterization of the detectable response to X-ray irradiation (up to 40 kV tube voltage) of the pixel on a glass substrate, the successful radiation hardness of the backplane OFETs (up to 1 kGy received dose) and a preliminary characterization of the bendable array fabricated on plastic.