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Halide perovskites for sensitive, stable and scalable X-ray detection and imaging
Shujie Tie1,2, Siyin Dong1, Ruihan Yuan1
1Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China. xiaojia@caep.cn.
Chemical Communications (Cambridge, England)
|April 11, 2023
Summary
Halide perovskites show promise for X-ray detection, outperforming current technologies. Bismuth-based perovskites offer improved stability and reduced dark current for advanced X-ray imaging applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Medical Imaging
Background:
- Halide perovskites are highly researched for X-ray detection due to superior sensitivity over amorphous selenium (a-Se) and Cadmium Zinc Telluride (CZT).
- Key challenges for lead-based perovskites include ion migration and high dark current, limiting their use in low-dose X-ray detection.
- Fabricating large-area, thick perovskites for integration with thin-film transistor (TFT) and complementary metal-oxide-semiconductor (CMOS) readouts remains a significant hurdle for multipixel flat-panel detectors.
Purpose of the Study:
- To review the potential and challenges of halide perovskites in X-ray detection and imaging.
- To highlight bismuth-based perovskites as promising alternatives due to enhanced stability.
- To explore fabrication methods for advanced perovskite X-ray detector development.
Main Methods:
- Summarizing and discussing various fabrication methods for perovskite materials.
- Analyzing the performance metrics of perovskite-based X-ray detectors.
- Comparing lead-based and bismuth-based halide perovskites for X-ray applications.
Main Results:
- Bismuth-based halide perovskites demonstrate reduced ion migration and lower dark current compared to lead-based counterparts.
- Perovskites offer higher X-ray attenuation and better carrier transport, leading to enhanced detector sensitivity.
- Various fabrication techniques like pressing, membrane filling, blade coating, and spray coating are evaluated for large-area perovskite production.
Conclusions:
- Bismuth-based halide perovskites present a viable path for next-generation X-ray detectors with improved performance and stability.
- Addressing challenges in large-area fabrication is crucial for integrating perovskite detectors with commercial electronics.
- Further research into perovskite X-ray detection and imaging can unlock new possibilities in medical and industrial applications.
