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 Cs 3 Cu 2 I 5 perovskite-like single crystal and a Si photodetector with a heterojunction structure. The Cs 3 Cu 2 I 5 -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 Cs 3 Cu 2 I 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 ( R 2 ) 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.