Cu-based metal-organic frameworks for highly sensitive X-ray detectors.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Detector Technology

Background:

• Metal-organic frameworks (MOFs) offer tunable properties for advanced applications.
• Developing high-performance, lead-free radiation detectors is crucial for safety and efficiency.
• Existing X-ray detectors often face limitations in sensitivity, stability, or environmental impact.

Purpose of the Study:

• To construct and evaluate lead-free Cu-DABDT-MOFs for X-ray detection.
• To investigate the charge generation and transport properties of these MOFs under X-ray exposure.
• To demonstrate the potential of MOF materials in high-energy radiation detection.

Main Methods:

• Synthesis of lead-free Cu-DABDT-MOFs (DABDT = 2,5-diamino-1,4-benzenedithiol).
• Fabrication of X-ray detector devices utilizing the synthesized Cu-DABDT-MOFs.
• Characterization of detector performance, including electron generation/capture, mobility-lifetime product, and detection sensitivity.

Main Results:

• Successfully constructed lead-free Cu-DABDT-MOFs-based X-ray detectors.
• Achieved a high mobility-lifetime (μτ) product of 6.49 × 10^-4 cm² V^-1.
• Demonstrated a promising detection sensitivity of 78.7 μC Gy_air^-1 cm^-2.
• Observed effective electron generation and capture under X-ray exposure due to high activation energy.

Conclusions:

• Cu-DABDT-MOFs are effective materials for lead-free X-ray detection.
• The developed detectors exhibit high performance characteristics suitable for radiation sensing.
• This work highlights the potential of MOFs for developing green and high-performance high-energy radiation detectors.