Fast Neutron Detector Based on Hybrid 2D Perovskite Thin Films

2D hybrid perovskites are a novel and promising class of semiconductors for the realization of direct fast neutron detectors because they combine excellent transport properties with a large organic cation, rich in low-Z elements, which strongly interacts with fast neutrons. Here, this study presents the employment of PEA2PbBr4 (PEA = C6H5C2H4NH3+) thin films for the direct detection of fast neutrons. By tuning the perovskite deposition process, it achieves a stable and reproducible response capable to monitor in real-time the flux of fast neutrons (energy = [1–4] MeV; beam flux = [0.4–3] · 105 n s−1cm−2) by providing an output electrical signal proportional to the radiation field intensity. Finally, the employment of a thin film-based device boosts the discrimination capability of this technology and offers the possibility to realize a flexible and easy-scalable detecting system very appealing for the development of wearable personal dosimeters.