Single Organic Cation Engineering Cu(I)-Based Ionic and Coordinate Type Halides as High-Efficiency Hydrogel Scintillator.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40742022.
- Also identified by DOI 10.1002/adma.202509478.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Cu(I)-based halide scintillators are promising candidates for X-ray detection due to excellent scintillation and low-cost solution processability. However, the rational design of Cu(I)-based halide scintillators remains challenging due to insufficient theoretical frameworks elucidating their structure-property correlations. In this work, two Cu(I)-based hybrid metal halides, Cu<sub>2</sub>I<sub>4</sub>-IC (Ionic compound) are designed and Cu<sub>4</sub>I<sub>4</sub>-CC (Coordination compound) via bonding mode control engineering. The Cu<sub>2</sub>I<sub>4</sub>-IC exhibits blue emission, and the Cu<sub>4</sub>I<sub>4</sub>-CC exhibits yellow emission, and the photoluminescence quantum yield (PLQY) of Cu<sub>2</sub>I<sub>4</sub>-IC and Cu<sub>2</sub>I<sub>4</sub>-IC are 91% and 100% respectively. The non-radiative transitions are reduced due to the high rigidity of Cu<sub>4</sub>I<sub>4</sub>, resulting in a light yield up to 67 500 photons MeV<sup>-1</sup> and a detection limit as low as 47.3 nGy s<sup>-1</sup> of Cu<sub>4</sub>I<sub>4</sub>-CC. Additionally, a high-performance scintillator hydrogel based on Cu<sub>4</sub>I<sub>4</sub>-CC with polyvinyl alcohol (PVA),H<sub>2</sub>O and dimethyl sulfoxide (DMSO) is innovatively developed. Owing to the high transmittance, the large-area scintillator hydrogel film (10 × 10 cm<sup>2</sup>) achieves an X-ray imaging resolution of 14 lp mm<sup>-1</sup>. Furthermore, the synergistic effects of hydrogen bonding and coordination bonding endow the hydrogel scintillator with excellent plasticity and flexible stretchability. The Cu<sub>4</sub>I<sub>4</sub>-CC@PVA hydrogel proves promising for X-ray imaging with excellent stability in harsh environments, matching state-of-the-art scintillators.