Triplet-triplet energy-transfer-based transparent X-ray imaging scintillators
Wang et al-Matter-revised-Final.pdf
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Embargo End Date:
Gutierrez Arzaluz, Luis
Mohammed, Omar F.
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Chemical Science Program
Functional Materials Design, Discovery and Development (FMD3)
Functional Nanomaterials Lab (FuNL)
Homogeneous Catalysis Laboratory (HCL)
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Embargo End Date2023-10-20
Permanent link to this recordhttp://hdl.handle.net/10754/685136
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AbstractIn this work, we fabricated a highly efficient and reabsorption-free transparent X-ray imaging scintillator with high performance using an efficient triplet-triplet energy transfer strategy between thermally activated delayed fluorophore (TADF-Br) and iridium organometallic complex (Ir-OMC). Steady-state and ultrafast time-resolved experiments—supported by high-level density functional theory calculations—clearly demonstrate that efficient triplet-triplet energy transfer from TADF-Br with a high X-ray absorption cross-section to emissive Ir-OMC can be achieved. Such high efficiency of interfacial triplet energy transfer and the heavy atoms in both the donor and acceptor led to a remarkable enhancement in triplet-state radioluminescence upon X-ray irradiation. The fabricated X-ray imaging scintillator achieved an X-ray imaging resolution of 19.8 lp mm−1, exceeding the resolution of most reported organic and organometallic scintillation screens.
CitationWang, J.-X., Dutta, I., Yin, J., He, T., Gutiérrez-Arzaluz, L., Bakr, O. M., Eddaoudi, M., Huang, K.-W., & Mohammed, O. F. (2022). Triplet-triplet energy-transfer-based transparent X-ray imaging scintillators. Matter. https://doi.org/10.1016/j.matt.2022.09.031
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST).