Copper Organometallic Iodide Arrays for Efficient X-ray Imaging Scintillators
Hong Wang1,2, Jian-Xin Wang1, Xin Song2
1Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
ACS Central Science
|May 1, 2023
Summary
Lead-free organic copper halide scintillators offer superior X-ray detection. A novel zero-dimensional material, (18-crown-6)2Na2(H2O)3Cu4I6 (CNCI), achieves high sensitivity and resolution for advanced X-ray imaging.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Medical Imaging
Background:
- Lead-free organic metal halide scintillators are promising for X-ray detection due to their electronic properties.
- Low-dimensional structures enhance optoelectronic performance in these materials.
Purpose of the Study:
- To develop high-performance X-ray imaging scintillators using lead-free organic metal halides.
- To investigate the potential of zero-dimensional organic copper halide (18-crown-6)2Na2(H2O)3Cu4I6 (CNCI) for X-ray detection.
Main Methods:
- Fabrication of a CNCI/polymer composite scintillator.
- Integration of CNCI into a silicon template for enhanced light wave-guiding.
- Characterization of X-ray sensitivity, light yield, detection limit, and spatial resolution.
Main Results:
- Achieved an ultrahigh light yield of ~109,000 photons/MeV for the CNCI/polymer scintillator.
- Demonstrated an ultralow detection limit of 59.4 nGy/s, significantly lower than standard medical X-ray dosages.
- Obtained a superior spatial resolution of 24.8 lp/mm with the pixelated CNCI-silicon array screen.
Conclusions:
- CNCI is a highly effective material for advanced X-ray imaging applications.
- The developed CNCI-silicon array design offers record-breaking resolution for organometallic scintillators.
- This work presents a novel approach for high-performance X-ray imaging in medical radiography and security screening.
