Wolfgang Heiss: Metal halide perovskites for X-ray detection

Metal halide perovskites (MHPs) changed the world of solution processed semiconductors, previously dominated by organic semiconductors, towards predominantly inorganic materials with relative high electron/hole mobility. A series of devices benefit from their optoelectronic properties, including X-ray detectors. After the introduction of MPH X-ray detectors in 2013, they have achieved significant improvements in the form of single crystals, polycrystalline materials and pixelated imaging devices. In addition, MHP in the form of colloidal nanocrystals act as excellent scintillators. In this talk I will present highlights of the development of X-ray detectors, from our own group, as well as from literature. The topics will address the ways towards low detection limit, scalability, imaging with perovskite materials, scintillator based devices and energy resolving detection. The presentation ends with a suggestion for a future simple device structure, allowing multi-energy imaging, in a straight and simple way.