Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.264
Publication date: 16th December 2024
Metal halide perovskites are gaining attention in detectors of high-energy photons, showing potential in thin-film dosimetry as well as imaging, the latter when prepared as single crystals. Typically, perovskites are made from solutions of the halide salts precursors, which might represent a challenge towards scalability and substrate integration. Here we will discuss dry synthetic methods for the fabrication of perovskite photodetectors. Perovskite thin-film detectors can be made using physical vapor deposition (PVD), an established industrial method. PVD allows for high-purity films with controlled thickness and easy integration into multilayer devices. We present PVD-based detectors with low dark and noise currents, stable reverse bias, and X-ray sensitivity >30 μC/Gy/cm². For thick perovskite materials, we introduce a dry method to prepare free-standing perovskite-polymer composite disks, tunable from 25 to 250 μm in thickness. These composites can be laminated onto rigid or flexible substrates, creating functional detectors with high environmental stability and promising limit of detection.
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