Abstract
Perovskites are a fascinating and varied class of materials that have great potential in radiation detector technologies. Following their initial development by the PV and solid-state lighting communities, perovskites are being actively developed worldwide as both semiconductor and scintillator radiation detectors. Of particular interest are lead halide perovskites where the presence of high-Z atoms such as Cs and Pb provides high X-ray and gamma ray efficiency, combined with good charge transport. These materials can be relatively easily fabricated using either high temperature or solution processing methods, with CsPbBr 3 currently the leading perovskite material for high resolution gamma spectroscopy applications. Particularly rapid progress has also been made in the development of perovskite X-ray imaging detectors, which have demonstrated excellent X-ray sensitivity, stability, and imaging performance. Through the use of sintered polycrystalline perovskite thick films, large area imaging detectors can be realised that are approaching the performance of traditional imaging detector materials such as a-Se and CdTe.The almost infinite range of perovskite materials means that the field of perovskite radiation detectors continues to expand. Structured 2D and 1D perovskites offer many hybrid organic/inorganic materials that combine high resistivity and low dark currents with excellent radiation sensitivity. 'Lead free' double perovskites also offer environmentally beneficial materials, many of which combine good semiconductor properties with remarkably high scintillation light yields.In this talk I will present an overview of the latest results from Surrey and our collaborators on perovskite radiation detectors, including semiconductor single crystal detectors for gamma spectroscopy and polycrystalline perovskites for X-ray imaging, plus some recent key results from perovskite scintillators.