TY - JOUR
T1 - Colloidal Cu4I4 Clusters for High-Resolution X-ray Imaging Scintillation Screens
AU - Zhou, Yang
AU - He, Tengyue
AU - Yuan, Peng
AU - Yin, Jun
AU - Chen, Shulin
AU - Gutierrez Arzaluz, Luis
AU - Wang, Lijie
AU - Bakr, Osman
AU - Mohammed, Omar F.
N1 - KAUST Repository Item: Exported on 2023-07-13
Acknowledgements: This work was supported by King Abdullah University of Science and Technology (KAUST).
PY - 2023/6/26
Y1 - 2023/6/26
N2 - Luminescent copper halide clusters have attracted wide attention in light-emitting diodes and optical sensors due to their intriguing physicochemical properties and diverse chemical structures. Recently, the clusters have also been explored as promising scintillation materials due to the heavy copper halide cores that provide a large absorption cross section for X-ray radiation. However, the related research on copper halide cluster scintillators is only in its infancy, and the scintillation performance of the clusters still lags behind that of perovskite and its related metal halide structures. Here we report 0D cubane-like Cu4I4(L)4 (L = 4-benzylpyridine or 4-tert-butylpyridine) clusters with broad emission band, high photoluminescence quantum yield (>85%), and a large Stokes shift. Density functional theory calculations demonstrate that the emission of both clusters mainly originates from the ligand-to-core charge transfer state. Besides, we successfully synthesized the colloidal cluster microcrystals and fabricated microcrystal-based films for X-ray imaging applications. We found that the cluster-based X-ray screens exhibited high light yields (>30000 photons MeV–1), low detection limits (
AB - Luminescent copper halide clusters have attracted wide attention in light-emitting diodes and optical sensors due to their intriguing physicochemical properties and diverse chemical structures. Recently, the clusters have also been explored as promising scintillation materials due to the heavy copper halide cores that provide a large absorption cross section for X-ray radiation. However, the related research on copper halide cluster scintillators is only in its infancy, and the scintillation performance of the clusters still lags behind that of perovskite and its related metal halide structures. Here we report 0D cubane-like Cu4I4(L)4 (L = 4-benzylpyridine or 4-tert-butylpyridine) clusters with broad emission band, high photoluminescence quantum yield (>85%), and a large Stokes shift. Density functional theory calculations demonstrate that the emission of both clusters mainly originates from the ligand-to-core charge transfer state. Besides, we successfully synthesized the colloidal cluster microcrystals and fabricated microcrystal-based films for X-ray imaging applications. We found that the cluster-based X-ray screens exhibited high light yields (>30000 photons MeV–1), low detection limits (
UR - http://hdl.handle.net/10754/692916
UR - https://pubs.acs.org/doi/10.1021/acsmaterialslett.3c00377
U2 - 10.1021/acsmaterialslett.3c00377
DO - 10.1021/acsmaterialslett.3c00377
M3 - Article
SN - 2639-4979
SP - 2002
EP - 2008
JO - ACS Materials Letters
JF - ACS Materials Letters
ER -