High-performance Silver and Copper Halide X-ray Imaging Scintillators

Mohammed, Omar F.

High-performance Silver and Copper Halide X-ray Imaging Scintillators

Type

Presentation

Authors

Mohammed, Omar F.

KAUST Department

Advanced Membranes and Porous Materials Research Center
Chemical Science Program
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group

Date

2022-07-15

Abstract

Scintillators are critical for high-energy radiation detection across a wide array of potential applications, from medical radiography and safety inspections all the way to space exploration. However, constrained by their current shortcomings, including high-temperature and complex fabrication, high cost, and inherent brittleness and fragility among thick films and bulk crystals, traditional scintillators are finding it difficult to meet the rising demand for cost-effective, eco-friendly, and flexible X-ray detection. Here, we describe the development of highly efficient and flexible X-ray scintillators based on films of Cu-doped Cs2AgI3, which exhibit ultrahigh X-ray sensitivity. The materials exhibit a high scintillation light yield of up to 82900 photons/MeV and a low detection limit of 77.8 nGyair/s, which is approximately 70 times lower than the dosage for a standard medical examination. Moreover, richly detailed X-ray images of biological tissue and electronic components with a high spatial resolution of 16.2 lp/mm were obtained using flexible large-area solution-processed scintillation screens. These findings demonstrate that Cu-doped Cs2AgI3 films can serve as extraordinary scintillation screens for high-performance X-ray imaging devices.

Citation

Mohammed, O. (2022). High-performance Silver and Copper Halide X-ray Imaging Scintillators. Proceedings of the International Conference on Emerging Light Emitting Materials. https://doi.org/10.29363/nanoge.emlem.2022.054