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Transparent and Planar Cs3Cu2Cl5 Crystals for Micrometer-Resolution X-ray Imaging Screen.
Weijia Xiang1, Depeng Shen2, Xiangzhou Zhang1
1Institute for Advanced Interdisciplinary Research (iAIR), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
ACS Applied Materials & Interfaces
|January 18, 2024
Summary
Researchers developed centimeter-sized copper halide perovskite crystals for advanced X-ray imaging. These Cs3Cu2Cl5 crystals offer high light yield and micrometer resolution, improving detector sensitivity and stability for practical applications.
Area of Science:
- Materials Science
- Solid-State Physics
- Crystallography
Background:
- Copper-based (I) halide perovskites are promising for X-ray imaging due to processability and high light yield.
- Existing materials often require complex shaping for scintillation screen applications.
Purpose of the Study:
- To grow centimeter-sized, planar Cs3Cu2Cl5 single crystals for X-ray scintillation screens.
- To evaluate the scintillation performance, resolution, and stability of the developed crystals.
- To introduce a solution-based synthesis for 2D scintillating crystals.
Main Methods:
- Slow-cooling method for crystal growth.
- Space-confined chamber for controlling planar orientation.
- Surface passivation technique for enhanced stability.
Main Results:
- Achieved centimeter-sized, planar Cs3Cu2Cl5 single crystals.
- Unity photoluminescence quantum yield and high light yield (95,000 photons/MeV).
- X-ray detector sensitivity down to 2.7 μGyair/s and spatial resolution of 105 lp/mm.
- Improved crystal stability, retaining phase after 6 months post-passivation.
Conclusions:
- Solution-processed Cs3Cu2Cl5 single crystals offer superior performance for X-ray imaging.
- The developed synthesis and passivation methods enable practical, high-resolution scintillation screens.
- This work paves the way for advanced X-ray inspection and imaging technologies.
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