Experimental study demonstrates a flexible self-powered perovskite X-ray dosimeter, indicating potential for continuous wearable medical radiation monitoring.
The demand for flexible and wearable sensors is more and more increasing in a wide range of applications. Specifically, in the field of medical diagnostics and radiation therapy, a flexible X-ray dosimeter is extremely desirable, due to the possibility of a conformal contact between the human body and the sensing device. Here we report on a flexible X-ray detector based on an ultrathin (500 nm) film of a wide-bandgap metal-halide-perovskite (FAPbBr3) as absorbing layer, showing sensitivity values up to 375.24 μC Gy-1 cm-2 to X-rays with energy up to 40 keV, excellent linearity with the radiation dose-rate (linearity coefficient 0.97), and very good operational stability under 12 h of continuous irradiation. The device, relying on a simple low-cost technology, exploits the built-in potential of a typical p-in architecture used in perovskite solar cells, hence it does not require a bias voltage to operate, allowing for continuous radiation monitoring with no risk of battery depletion.
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Girolami et al. (2025) studied this question.
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