Abstract: Traditional solid detectors such as scintillators and semiconductors are difficult to meet the future requirements for flexible radiation detection applications. Therefore, in this paper, a new technology route is proposed based on novel perovskite materials. The perovskite solution is filled into the flexible matrix of porous nylon film, and the flexible detection materials are prepared through recrystallization. Scanning electron microscopy imaging, X-ray diffraction, ultraviolet absorption spectroscopy, and tests such as μτ value, dose rate linearity, and detection sensitivity under X-ray irradiation are conducted on six prepared materials. The six materials are optimized and further X-ray and γ-ray tests are carried out. The results show that the μτ value of [NH₃(CH₂)₄NH₃]BiI₅ flexible film material is 1.30×10^-3 cm²·V^-1; the optical band gap is 2.02 eV: and the detection sensitivity is (3 190±50)μC·Gy_air^-1·cm^-2, which is superior to existing semiconductor detectors and retains the inherent excellent detection characteristics of perovskite crystal materials. This paper lays an important foundation for the subsequent research and development of flexible radiation detectors and detection systems.

Key words: flexible detector, perovskite materials, film detector, X/γ detection, multi-dimensional characterization