Nontoxic, stable X-ray detector materials for rapid, low-dose imaging
Layered BiOI single crystals enable ultra-low-dose, stable X-ray detection with high stopping power and fast, delocalised charge transport.
Current X-ray detector materials cannot simultaneously deliver strong absorption, low noise and efficient charge transport at very low doses rates. Researchers developed novel bismuth oxyiodide (BiOI) single crystals as high-performance materials for detecting very low dose of X-rays, a key capability for safer and more sensitive medical and industrial radiography.
Applications: Low-dose radiography, Precise X-ray imaging, Portable X-ray devices, Industrial non-destructive testing, Security screening systems, X-ray video
| Features | Benefits |
|---|---|
| Low dose detection down to 22 nGyair·s⁻¹ | Reduced patient and operator radiation exposure; New applications becomes feasible, such as X-ray videos |
| X-ray absorption (attenuation) enhanced through heavy elements bismuth and iodine, characterised for their strong X-ray stopping power | Reduction of detector thickness and system weight for compact and portable platforms |
| Direct conversion detection from X-rays to electrical signal | High spatial resolution and fast temporal response; Simple system architecture with no need for scintillation step |
| Low dark current and noise | Clear detection of weak signals; Lower power consumption; Improved image quality |
| Efficient charge transport via delocalised large polarons instead of self-trapping | Absorbed X-rays reliably turn into usable electrical signals; Improved signal-to-noise ratio |
| Lead-free chemistry | Regulatory compatibility; Safe manufacturing and disposal |
Patented and Available For
- Co-development
- Consulting
- Licensing