Color‐Tunable and Stable Copper Iodide Cluster Scintillators for Efficient X‐Ray Imaging. Issue 5 (3rd December 2022)

• Record Type: Journal Article
• Authors: Zhao, Wenjing; Wang, Yanze; Guo, Yuanyuan; Suh, Yung Doug; Liu, Xiaowang
• Is Part Of: Advanced science. Volume 10:Issue 5(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-03
• Subjects: copper iodide cluster -- radioluminescence -- scintillator -- tunable bandgap -- X‐ray imaging; Science -- Periodicals; 505
• DOI: 10.1002/advs.202205526
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: The search for color‐tunable, efficient, and robust scintillators plays a vital role in the development of modern X‐ray radiography. The radioluminescence tuning of copper iodide cluster scintillators in the entire visible region by bandgap engineering is herein reported. The bandgap engineering benefits from the fact that the conduction band minimum and valence band maximum of copper iodide cluster crystals are contributed by atomic orbitals from the inorganic core and organic ligand components, respectively. In addition to high scintillation performance, the as‐prepared crystalline copper iodide cluster solids exhibit remarkable resistance toward both moisture and X‐ray irradiation. These features allow copper iodide cluster scintillators to show particular attractiveness for low‐dose X‐ray radiography with a detection limit of 55 nGy s −1, a value ≈100 times lower than a standard dosage for X‐ray examinations. The results suggest that optimizing both inorganic core and organic ligand for the building blocks of metal halide cluster crystals may provide new opportunities for a new generation of high‐performance scintillation materials. Abstract : The radioluminescence tuning of copper iodide cluster scintillators in the entire visible region by bandgap engineering through the choice of organic ligand is reported. The optimized crystalline copper iodide cluster solids show high scintillation performance and remarkable resistance toward moisture and X‐ray irradiation, enabling attractive application for low‐dose X‐ray radiography.