Ultra-stable CsPbBr3-embedded polymer films for spectrally tunable X-ray nuclear batteries and flexible radiation imaging applications

Luminescence instability in service environments has limited the widespread use of halide perovskite materials, especially for X-ray energy conversion and detection/imaging. This work proposed a method for improving luminescence stability through polymer encapsulation, which is more convenient than compositional engineering and surface modulation. Meanwhile, the differences in the luminescence intensities of composite films synthesized by encapsulation of different polymer matrices and their luminescence stability under various harsh X-ray irradiation conditions were systematically investigated. The applications of the developed CsPbBr3-embedded polymer films with excellent luminescence performance and high service stability in X-ray radiation energy utilization and detection/imaging were discussed. The results show that CsPbBr3-embedded PS films can meet the spectral modulation requirements of radioluminescent materials for nuclear batteries and can also fulfill the needs of flexible X-ray imaging with a high spatial resolution.