Stacked Scintillators Based Multispectral X‐Ray Imaging Featuring Quantum‐Cutting Perovskite Scintillators With 570 nm Absorption‐Emission Shift

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Traditional energy‐integration X‐ray imaging systems rely on total intensity for image contrast, ignoring energy‐specific information. Recently developed multilayer stacked scintillators have enabled multispectral, large‐area flat‐panel (FPXI), enhancing material discrimination capabilities. However, increased layering can lead to mutual excitation, which may affect the accurate of energy. This issue is tackled by proposing a novel design strategy utilizing rare earth ions doped quantum‐cutting as top layer. These create new luminescence centers via energy transfer, resulting in significantly larger absorption‐emission shift, well potential double photoluminescence quantum yield (PLQY) and enhance light output. To verify this concept, three‐layer scintillator detector using ytterbium (Yb 3+ )‐doped CsPbCl 3 perovskite nanocrystals (PeNCs) layer, offers high PLQY over 100% significant shift 570 nm. configuration, CsAgCl 2 Cs Cu I 5 middle bottom layers, respectively, ensures non‐overlapping optical absorption radioluminescence (RL) emission spectra. By calculating optimal thickness each layer absorb specific energies, demonstrates distinct differences across various bands, identification materials with similar densities.

Language: Английский

Efficient and Stable 0D Cs₃Cu₂Br₅:Mn Single Crystals for Low‐Dose High‐Resolution X‐Ray Imaging

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Abstract Scintillators, essential component of radiation detectors, have garnered significant attention for their pivotal roles in homeland security, medical imaging, and nondestructive inspection applications. However, existing scintillators still face challenges simultaneously achieving high scintillation efficiency, stability, low toxicity. Herein, a novel Cs 3 Cu 2 Br 5 :Mn single crystal (SC) scintillator, utilizing nontoxic Mn 2+ as activator, is developed. The introduction ⁺ into the 0D host induces green emission with photoluminescence quantum yield 92.9%. Compared to undoped , ‐doped one exhibits 120% increase steady‐state reaching 14 000 photons MeV −1 . Moreover, X‐ray detection limit improves from 49.3 16.8 nGy air s SC also achieves an ultra‐high spatial resolution 24 line pairs (lp) mm when utilized flat screen. This study demonstrates promising strategy design high‐performance by doping eco‐friendly metal, offering new avenues advancements technologies.

Language: Английский