Ultrabroad Dynamic All-Solid-State Radiation Dose Detector Based on a 0D Cs3Cu2I5 Perovskite-Like Single Crystal

Radiation dose detectors based on a gas-filled detecting mode play an important role in cancer radiation therapy, nuclear accident early warning, and radiation protection but still suffer from frequent air density corrections, a high working voltage, and a long stability time. Therefore, to tackle these issues, the development of high-performance all-solid-state radiation dose detectors is urgently needed. Here, we demonstrated a prototype of a highly sensitive all-solid-state radiation dose detector based on a highly efficient Cs3Cu2I5 perovskite-like single crystal and a Si photodetector with a heterojunction structure. The Cs3Cu2I5-based detector exhibits an ultrabroad dynamic range of 11.45 mGy·h–1 to 107.3 Gy·h–1, covering nearly 5 orders of magnitude for γ-ray with the upper limit being 100 times higher than that of Cs3Cu2I nanocrystal of 0.846 Gy·h–1 and the detection limit approaching the lower limit of the radiotherapy level (10 mGy·h–1). Moreover, it has an outstanding linear response with a linear correlation coefficient (R2) of 0.9999 for the X/γ-ray incident dose rate and a good repeatable response deviation of less than 0.3% for γ-rays, which is comparable to classical ionization chamber detectors. This work opens a horizon of developing ultrabroad dynamic, highly sensitive, and low-power consumption all-solid-state radiation dose detectors based on perovskite-like single-crystal scintillators.