期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 42, 页码 47913-47921出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c14582
关键词
metal halides; single-crystal scintillator; X-ray absorption capacity; radioluminescence; X-ray imaging
资金
- National Natural Science Foundation of China [U2001214]
- NSF of Guangdong Province [2019B1515120050]
- GDUPS [2016]
- China Postdoctoral Science Foundation [2021M693602]
- Fundamental Research Funds for the Central Universities
A single crystal scintillator, TEA2MnI4, with high transmittance and light yield has been successfully prepared using a local-heating solvent evaporation method. It shows potential for high-resolution X-ray imaging.
Current X-ray imaging scintillators are dominated by inorganic scintillators grown through a high-temperature process. Exploring new types of scintillators with mild growth conditions, high light yields, and eco-friendly chemical compositions is essential and challenging. Herein, the zero-dimensional large-area laminar organic-inorganic hybrid metal halide TEA2MnI4 (TEA = tetraethylammonium) single crystal with dimensions of 50 mm x 60 mm x 0.82 mm is grown via a local-heating solvent evaporation method. Compared with its Cl-and Br-based counterparts, the incorporation of the iodine component enhances the X-ray attenuation ability and significantly accelerates the decay of the photoluminescence of TEA2MnI4. Interestingly, the prepared TEA2MnI4 exhibits a high transmittance of >90% over the range of 515-765 nm and exhibits a high light yield of 26288 photons/MeV, which provides the prerequisite for high-resolution X-ray imaging. The TEA2MnI4 single-crystal scintillator displays an astonishing spatial resolution exceeding 25 line pairs per millimeter, which provides a design concept for a Mn-I-based single crystal for high-performance scintillator applications.
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