CsPbBr₃-DMSO merged perovskite micro-bricks for efficient X-ray detection.

Area of Science:

• Materials Science
• Solid-State Chemistry
• Detector Physics

Background:

• Inorganic perovskite wafers offer promising X-ray detection capabilities due to stability and tunable sizes.
• High synthetic temperatures for perovskite wafer fabrication pose a significant challenge for practical applications.

Purpose of the Study:

• To develop a low-temperature synthesis route for stable inorganic perovskite wafers.
• To enhance the performance and charge transport properties of CsPbBr3 for X-ray detection.

Main Methods:

• Utilized dimethyl sulfoxide (DMSO) for room-temperature preparation of CsPbBr3 micro-bricks powder.
• Employed hot isostatic processing to merge micro-bricks into dense wafers.
• Characterized the CsPbBr3-DMSO adduct and the final wafer properties.

Main Results:

• Achieved room-temperature synthesis of cubic CsPbBr3 powder with high crystallinity and low defects.
• Formed a CsPbBr3-DMSO adduct via Pb-O bonding, facilitating wafer formation.
• Produced dense CsPbBr3 wafers with minimized grain boundaries and excellent charge transport (μτ product of 5.16 × 10⁻⁴ cm²/V).
• Demonstrated high sensitivity (14,430 μC·Gyair⁻¹·cm⁻²), low detection limit (564 nGyair·s⁻¹), and robust stability in X-ray detection.

Conclusions:

• A novel, low-temperature strategy for fabricating high-performance inorganic perovskite wafers for X-ray detection was established.
• The DMSO-assisted synthesis and hot isostatic processing method significantly improves wafer quality and detector performance.
• This approach holds immense potential for advancing high-contrast X-ray imaging applications.