High-Sensitivity Dual-Energy X-ray Detection and Imaging Using Perovskite Thin Crystals

Area of Science:

• Materials Science
• Medical Imaging
• Solid-State Physics

Background:

• Dual-energy X-ray imaging is crucial for medical, security, and industrial applications.
• Current methods using photon-counting or multilayer detectors are often complex.
• There is a need for simpler, high-sensitivity dual-energy X-ray detection systems.

Purpose of the Study:

• To introduce a novel surface-treated perovskite thin-crystal device for high-sensitivity dual-energy X-ray imaging.
• To demonstrate enhanced optoelectronic performance and device stability.
• To enable precise material differentiation beyond conventional X-ray detectors.

Main Methods:

• Fabrication of a surface-treated perovskite thin-crystal device with engineered electrode architecture.
• Characterization of optoelectronic performance, including sensitivity and detection limit.
• Tailoring internal electric field distribution for energy discrimination.
• Algorithmic processing of response currents for image reconstruction and material differentiation.

Main Results:

• Achieved high sensitivity (4.5 × 10⁴ μC·Gy⁻¹·cm⁻²) and a low detection limit (13.8 nGy·s⁻¹).
• Demonstrated excellent energy discrimination capability through controlled X-ray photon absorption.
• Successfully reconstructed subtraction images of overlapping objects.
• Enabled precise material differentiation using the ratio of X-ray absorption coefficients (μ_L/μ_H).

Conclusions:

• The developed perovskite device offers a simple and efficient approach to dual-energy X-ray imaging.
• The engineered electrode architecture facilitates controlled X-ray absorption and energy discrimination.
• This technology provides new possibilities for multifunctional perovskite-based devices in various imaging fields.