A Thermoplastic Organic Metal Halide Scintillator

Abstract

X-ray imaging has been developed with widespread industrial applications, from medical diagnostics, security, and industrial inspection all the way to space exploration. Accordingly, enthusiasm for extensive research on scintillators has been steadily growing. However, obtaining scintillators with superior performance via feasible processing and minimizing the scattering of X-ray propagation between the scintillator screen and the imaging object, especially for targets with highly curved surfaces, are still challenges. Here, an organic metal halide scintillator [Bmmim] 2 SbCl 5 (Bmmim = 1-butyl-2,3methylimidazolium) is developed, which reveals a fascinating thermoplastic characteristic at 363 K. It allows the as-explored scintillator to be used as an adhesive paint, addressing the light scattering of X-ray imaging fundamentally. The rheological property is demonstrated to profit from the structural characteristic of [SbCl 5 ] 2− and organic groups directly connected by hydrogen bonds. Moreover, the exceptional processability of the corresponding scintillator further confirms its recycling capability in painting/scraping onto/from the targets. Notably, X-ray imaging with a high resolution (∼12.5 lp mm −1 ) is constantly achievable. Herein, these results not only figure out the light scattering of X-ray imaging for curved or irregularly shaped objects but also open a new avenue to the development of low-cost X-ray detectors and imagers with feasible processability.

Excited State Regulated Emission in Hybrid Indium Halides via Crystal Structure Switch

“…Organic–inorganic hybrid metal halides due to rich optoelectronic properties have attracted extensive research, particularly in the fields of solid-state lighting, , scintillators, − photodetectors, etc. , Pb-based perovskites have attracted attention due to their excellent emission characteristics and high photoluminescence quantum yield (PLQY). − However, their intrinsic thermal instability and toxicity have limited practical applications. To address these issues, various metal cations have been used to replace Pb 2+ to reduce the toxicity of materials.…”

Optimized Gd2O2S:Pr Scintillation Films for X-ray Flat Panel Imaging: Balancing Enhanced Efficiency with Flexibility

“…These features effectively mitigate the limitations of bulk scintillators. Particularly, the development of perovskite nanocrystals in recent years has attracted significant attention toward flexible scintillation films. − However, the light yield of perovskite nanocrystal scintillators remains inferior in comparison to traditional bulk scintillation materials owing to their small Stokes shift and strong self-absorption . Inspired by flexible perovskite nanocrystal scintillation films, the combination of traditional granular scintillators with an organic polymer matrix has the potential to yield similar benefits. − Praseodymium-doped gadolinium oxysulfide (Gd 2 O 2 S:Pr) exhibits excellent characteristics, including high intrinsic X-ray to light conversion efficiency, rendering it suitable for X-ray imaging applications. − Although Gd 2 O 2 S:Pr phosphors or ceramic scintillators have been successfully applied in flat panels and CT detectors, flexible scintillation films based on Gd 2 O 2 S:Pr phosphors have seldom been reported …”