Transparent glassy composites incorporating lead-free anti-perovskite halide nanocrystals enable tunable emission and ultrastable X-ray imaging

Abstract

Lead halide perovskite materials exhibit excellent scintillation performance, which, however, suffer from serious stability and toxicity problems. In contrast, the heavy metal-free anti-perovskite materials ½MX 4 XA 3 (A = alkali metal; M = transition metal; X = Cl, Br, I), a class of electron-inverted perovskite derivatives, exhibit robust structural and photophysical stability. Here, we design and prepare a lead-free ½MnBr 4 BrCs 3 anti-perovskite nanocrystal (NC)-embedded glass for efficient X-ray-excited luminescence with high-resolution X-ray imaging with a spatial resolution of 19.1 lp mm −1 . Due to the unique crystal structure and the protection of the glass matrix, the Cs 3 MnBr 5 NC-embedded glass exhibits excellent X-ray irradiation stability, thermal stability, and water resistance. These merits enable the demonstration of real-time and durable X-ray radiography based on the developed glassy composite. This work could stimulate the research and development of novel metal halide anti-perovskite materials and open a new path for future development in the field of high-resolution and ultrastable X-ray imaging.

Enhanced Radiation Resistance of Er3+/Yb3+ Co-Doped High-Phosphorus Silica Glasses and Fibers via Phase-Interface Engineering

“…Table 1 presents the uorescence lifetimes of Yb³ ions (at 1030 nm) and Er³ ions (at 1.5 µm) in SEY0, SEY50, and SEY100 glasses. The decay behavior of numerous materials deviates from the exponential decay model [47,48]. Therefore, for such materials, a common approach for tting decay is to leverage multi-exponential tting, followed by calculating the average decay lifetime based on this approach.…”

Multiphase Transformation in Hybrid Copper(I)-Based Halides Enable Improved X-ray Scintillation and Real-Time Imaging

“…X-ray scintillators have the capability to transform high-energy X-rays into low-energy ultraviolet or visible light. − The ability of X-ray imaging that based on scintillator devices to detect the internal structure of opaque objects under X-rays has significantly contributed to medical or industrial inspection. − Among them, zero-dimensional (0D) metal halides have emerged as a novel scintillator material, because of their exceptional luminescence properties and ease of solution processing. − Given their excellent solution processability, 0D metal halides are used to prepare scintillation films suitable for imaging applications. − However, particle aggregation within the scintillation film ultimately reduces transparency, thereby causing luminescence bursts that limit the practical use of such films in X-ray scintillation imaging.…”

Large-Sized Nitrogen-Containing Biphenyl-Doped p-Terphenyl Crystals with Tunable Luminescence for Organic Scintillators

“…As one typical example, p -terphenyl crystal-based scintillators can be used in particle identifiers for measuring neutron spectra . Fortunately, because organic crystals have the advantages of low cost, easy preparation, a wide variety of materials, and resistance to deliquescence, they have shown application potential in the field of X-ray detection and imaging, arousing the interest of researchers. − However, the scintillator performance of organic crystals still needs to be continuously improved . The doping strategy is considered an effective method to enhance the scintillation performance of crystals. − In recent years, unique tunable luminescence properties of organic materials can be achieved via a controllable doping strategy, which can be applied to X-ray detection.…”