High-Performance X-ray Detection Based on One-Dimensional Inorganic Halide Perovskite CsPbI₃

Area of Science:

• Materials Science
• Solid-State Physics
• Detector Technology

Background:

• Three-dimensional (3D) halide perovskites have been explored for X-ray detection due to favorable electronic and absorption properties.
• Challenges remain in optimizing the sensitivity and stability of 3D halide perovskites under demanding conditions.

Purpose of the Study:

• To investigate the potential of one-dimensional (1D) inorganic halide perovskite CsPbI3 crystals for stable and sensitive X-ray detection.
• To compare the performance of 1D CsPbI3 detectors with existing 3D halide perovskite detectors.

Main Methods:

• Fabrication and characterization of X-ray detectors utilizing 1D CsPbI3 crystals.
• Measurement of X-ray detection sensitivity and stability under operational conditions.
• Analysis of material properties, including resistivity and carrier mobility-lifetime product, to understand detection performance.

Main Results:

• The CsPbI3-based X-ray detector achieved a high sensitivity of 2.37 mC·Gy-1·cm-2.
• This sensitivity is an order of magnitude higher than previously reported detectors based on 3D halide perovskites.
• The enhanced performance is linked to the high resistivity (7.4 × 10^9 Ω·cm) and large carrier mobility-lifetime product (3.63 × 10^-3 cm^2·V^-1) of CsPbI3 crystals.

Conclusions:

• One-dimensional CsPbI3 crystals offer a promising alternative for developing stable and highly sensitive X-ray detectors.
• The findings highlight the potential of low-dimensional perovskite materials in advanced X-ray detection applications.