Flexible Lead-Free X-ray Detector from Metal-Organic Frameworks

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Semiconductive metal-organic frameworks (MOFs) are promising for next-generation electronic devices.
• MOFs offer designable structures and tunable properties for advanced sensor applications.
• X-ray detectors are crucial for medical imaging and radiation monitoring.

Purpose of the Study:

• To design and present flexible X-ray detectors utilizing Ni-DABDT MOFs.
• To investigate the carrier transportation pathways within the Ni-DABDT MOF framework.
• To demonstrate the potential of MOF materials in wearable X-ray detection.

Main Methods:

• Fabrication of flexible X-ray detectors with Ni-DABDT MOFs as the absorbing layer.
• Characterization of the detector's performance, including sensitivity and detection limit.
• Analysis of the π-d coupling interactions responsible for carrier transport.

Main Results:

• The Ni-DABDT MOF detector achieved a high sensitivity of 98.6 μC Gy_air^-1 cm^-2.
• A low detection limit of 7.2 μGy_air s^-1 was observed, demonstrating radiation robustness.
• The framework's π-d coupling interactions facilitated efficient carrier transportation.

Conclusions:

• Ni-DABDT MOFs enable the development of high-performance, flexible X-ray detectors.
• These MOF-based detectors show significant potential for wearable radiation monitoring and imaging.
• This work highlights MOFs as a versatile platform for green and advanced sensor technologies.