Afterglow Copper(I) Iodine Cluster Scintillator
Copper(I) iodine clusters have drawn intense attention due to their advantageous photophysical properties, such as a high luminescence efficiency, large Stokes shift, and tunable luminescence lifetimes. In this work, a copper(I) iodine cluster (Cu<sub>2</sub>I<sub>2</sub>-CH<sub>3</sub>CN) was synthesized, which exhibits unique afterglow emission, ultrahigh quantum yield (90.1 % in solid state) and aggregation-induced emission (AIE) behavior. It was found that thermally activated delayed fluorescence (TADF) and long-lifetime phosphorescence occur simultaneously in Cu<sub>2</sub>I<sub>2</sub>-CH<sub>3</sub>CN. The unique photoluminescence properties of Cu<sub>2</sub>I<sub>2</sub>-CH<sub>3</sub>CN were attributed to the large spin-orbit coupling (SOC) and long-term rigidity of the crystal. The high quantum efficiency, TADF characteristics, and heavy-atom composition of Cu<sub>2</sub>I<sub>2</sub>-CH<sub>3</sub>CN endow it with excellent X-ray excited luminescence (XEL) properties, making it a promising X-ray scintillator. A flexible scintillator screen made of Cu<sub>2</sub>I<sub>2</sub>-CH<sub>3</sub>CN was successfully fabricated and used for X-ray imaging with a spatial resolution of 23.6 LP mm<sup>-1</sup>.
Authors
- Donghui Wei (ORCID: https://orcid.org/0000-0003-2820-282X)
- Shilong Wei
- Han Zhang (ORCID: https://orcid.org/0000-0003-4429-9959)
- Kai Li (ORCID: https://orcid.org/0000-0001-9458-4796)
- Yingnan Zhao (ORCID: https://orcid.org/0000-0002-1775-7515)
- Qi Yang (ORCID: https://orcid.org/0009-0009-2446-7004)
- Bo-Han Yao
- Ruoyu Cao
Institutions
- Zhengzhou University (CN)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2025-02-13
- DOI
- https://doi.org/10.1002/anie.202500481
- Citations
- 33
- Primary Topic
- Lanthanide and Transition Metal Complexes
- Type
- article
- Field-Weighted Citation Impact
- 17.09