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Thermally Activated Delayed Fluorescence Coinage Metal Cluster Scintillator

[Image: see text] X-ray scintillators are widely used in medical imaging, industrial flaw detection, security inspection, and space exploration. However, traditional commercial scintillators are usually associated with a high use cost because of their substantial toxicity and easy deliquescence. In...

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Detalles Bibliográficos
Autores principales: Peng, Qiu-Chen, Si, Yu-Bing, Wang, Zhao-Yang, Dai, Shu-Heng, Chen, Qiu-Shui, Li, Kai, Zang, Shuang-Quan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10375876/
https://www.ncbi.nlm.nih.gov/pubmed/37521783
http://dx.doi.org/10.1021/acscentsci.3c00563
Descripción
Sumario:[Image: see text] X-ray scintillators are widely used in medical imaging, industrial flaw detection, security inspection, and space exploration. However, traditional commercial scintillators are usually associated with a high use cost because of their substantial toxicity and easy deliquescence. In this work, an atomically precise Au–Cu cluster scintillator (1) with a thermally activated delayed fluorescence (TADF) property was facilely synthesized, which is environmentally friendly and highly stable to water and oxygen. The TADF property of 1 endows it with an ultrahigh exciton utilization rate. Combined with the effective absorption of X-ray caused by the heavy-atom effect and a limited nonradiative transition caused by close packing in the crystal state, 1 exhibits an excellent radioluminescence property. Moreover, 1 has good processability for fabricating a large, flexible thin-film device (10 cm × 10 cm) for high-resolution X-ray imaging, which can reach 40 μm (12.5 LP mm(–1)). The properties mentioned earlier make the coinage metal cluster promising for use as a substitute for traditional commercial scintillators.