0D triiodide hybrid halide perovskite for X-ray detection

Area of Science:

• Materials Science
• Solid-State Physics
• Radiological Imaging

Background:

• Developing high-performance, stable, and environmentally friendly X-ray detectors is crucial.
• Existing detectors often face limitations in sensitivity, stability, or environmental impact.
• Bismuth-based hybrid organic-inorganic perovskites are emerging as promising candidates for radiation detection.

Purpose of the Study:

• To introduce a new class of lead-free hybrid organic-inorganic perovskites for X-ray detection.
• To develop and characterize a zero-dimensional (0D) triiodide-induced perovskite, (DPA)2BiI9, for X-ray detection applications.
• To evaluate the performance and stability of the developed perovskite-based X-ray detector.

Main Methods:

• Synthesis and characterization of a novel zero-dimensional (0D) triiodide-induced lead-free hybrid perovskite, (DPA)2BiI9.
• Fabrication of an X-ray detector utilizing the synthesized perovskite material.
• Comprehensive testing of the detector's performance, including X-ray sensitivity, detectable dose rate, response time, and long-term stability.

Main Results:

• The (DPA)2BiI9 perovskite exhibited high X-ray sensitivity (20,570 μC Gyair⁻¹ cm⁻²).
• The detector demonstrated a low detectable dose rate (0.98 nGyair s⁻¹).
• Fast response times (154/162 ns) and excellent long-term stability were achieved.

Conclusions:

• The developed (DPA)2BiI9-based X-ray detector shows outstanding performance characteristics.
• This lead-free hybrid perovskite represents a significant advancement in environmentally friendly X-ray detection materials.
• The material's properties suggest its potential for next-generation high-performance X-ray imaging systems.