High-Resolution Dual-Energy X-ray Imaging Enabled by Transparent Thermally Activated Delayed Fluorescence (TADF) Scintillation Screen DOI
Jianxin Wang, Tengyue He,

Xin Zhu

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 7(1), P. 250 - 256

Published: Dec. 16, 2024

Dual-energy X-ray imaging technology provides more detailed material-specific information by using a second spectrum. However, conventional dual-energy typically necessitates two separate exposures to combine high- and low-energy projections. This process can result in image misalignment increased radiation doses. Herein, system two-layered scintillator was developed, featuring transparent pure organic thermally activated delayed fluorescence (TADF) materials as the absorption layer LYSO high-energy layer. Separating energy bins on detector side enables simultaneous sequential acquisition of low- projections with single exposure. achieves high resolution 23 lp/mm, surpassing most single-layer scintillators. Additionally, effectiveness this demonstrated toolbox inspection, where complex objects inside were successfully imaged differentiated, capturing all intricate details

Language: Английский

Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal DOI Creative Commons
Hao Suo, Nan Wang, Yu Zhang

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 2, 2025

Abstract Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to zero-dimensional nature crystal lattice minimizes energy crosstalk, different excitonic states be selectively excited by ultraviolet light, X-ray irradiation, mechanical action, enabling dynamic control steady/transient-state features modulating excitation modes. Remarkably, transparent exhibits efficient white photoluminescence (quantum yield >97%), blue emission with long afterglow (duration >9 h), high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal exceptional capability low-dimensional integrating various luminescence, offering exciting opportunities multi-level data encryption all-in-one authentication technologies.

Language: Английский

Citations

4
Energy transfer-based X-ray imaging scintillators DOI
Jianxin Wang, Osama Shekhah, Osman M. Bakr

et al.

Chem, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

Citations

10
Stacked Scintillators Based Multispectral X‐Ray Imaging Featuring Quantum‐Cutting Perovskite Scintillators With 570 nm Absorption‐Emission Shift DOI Open Access
Juan Hui,

Peng Ran,

Yirong Su

et al.

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

Citations

0
High-Resolution Flexible X-ray Imaging in a Two-Dimensional Mn2+-Doped Perovskite Scintillator DOI
Rong Hao, Xinqi Xu,

Jia-Yu Yao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Flexible scintillator screens characterized by high spatial resolution, low cost, and a simple fabrication process are in significant demand for applications medical diagnosis industrial detection. Here, we have demonstrated new Mn2+-doped two-dimensional (2D) Ruddlesden-Popper type perovskite, (4-tert-butylbenzylamine)2PbBr4:Mn, serving as highly efficient candidate. Doping with Mn2+ induces spin-forbidden internal transition (4T1g → 6A1g) that enhances the energy-transfer efficiency from strongly bound excitons of host material to d electrons ions, ultimately leading intense orange-red emission. This photoluminescence quantum yield (4-tert-butylbenzylamine)2PbBr4 (1) decreases its self-absorption. Therefore, at optimal Mn2+-doping concentration, 1:8.4%Mn2+ demonstrates light 21,532 Ph/MeV detection limit 198.19 nGyair s-1, exceeding performance commercial bismuth germanium oxide (BGO) scintillator. Furthermore, combined ultrafine powders poly(dimethylsiloxane) fabricate flexible films. With film thickness mass percentage 1:8.4%Mn2+, films achieve their maximum resolution 17.3 lp mm-1. The above results indicate exceptional scintillation imaging effectively addresses shortcomings current scintillators, thereby providing option family.

Language: Английский

Citations

0
End-to-end design of multicolor scintillators for enhanced energy resolution in X-ray imaging DOI Creative Commons
Seokhwan Min, Seou Choi, Simo Pajovic

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: April 11, 2025

Abstract Scintillators have been widely used in X-ray imaging due to their ability convert high-energy radiation into visible light, making them essential for applications such as medical and physics. Recent advances the artificial structuring of scintillators offer new opportunities improving energy resolution scintillator-based detectors. Here, we present a three-bin energy-resolved framework based on three-layer multicolor scintillator conjunction with physics-aware image postprocessing algorithm. The is able preserve information through combination emission wavelength multiplexing energy-dependent isolation absorption specific layers. dominant color radius spot measured by detector are infer incident prior knowledge profiles stack. Through ab initio Monte Carlo simulations, show that our approach can achieve an reconstruction accuracy 49.7%, which only 2% below maximum achievable realistic scintillators. We apply phantom simulations where demonstrate it effectively differentiate iodine gadolinium-based contrast agents from bone, muscle, soft tissue.

Language: Английский

Citations

0
Ultra‐Broad Emission Copper Halide Scintillator‐Based X‐Ray Imager DOI Creative Commons

Haocheng Lv,

Wenyi Shao, Haifeng Chen

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract Lead‐free metal‐halide scintillators are gaining considerable attention as more eco‐friendly and superior alternatives to their lead‐based counterparts. However, novel broad‐emission band like the state‐of‐the‐art CsI: Tl scintillator, which can generate high signals due its strong compatibility with spectral responsivity of regular photodiode arrays, still less investigated. Herein, a TPA 2 Cu I 4 (TPACI) copper halide scintillator unique ultra‐broad emission (FWHM > 240 nm) is developed, shows universal peak response range commercial photodetector. The optical properties characterization mechanism analysis indicates that this spectrum be attributed dual self‐trapped exciton (STE) consisting two bands. Benefiting from large Stokes shift enabled by STE, self‐absorption‐free TPACI exhibits efficient white light photoluminescence quantum yields 94.27%, yield ≈40124 photons MeV −1 . Moreover, prototype scintillator‐based X‐ray imager assembled for inspecting internal structures biological electronic devices, demonstrated resolution 5.5 lp mm at modulation transfer function = 0.2. These findings provide insights into design efficient, high‐resolution imaging.

Language: Английский

Citations

1
High-Resolution Dual-Energy X-ray Imaging Enabled by Transparent Thermally Activated Delayed Fluorescence (TADF) Scintillation Screen DOI
Jianxin Wang, Tengyue He,

Xin Zhu

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 7(1), P. 250 - 256

Published: Dec. 16, 2024

Dual-energy X-ray imaging technology provides more detailed material-specific information by using a second spectrum. However, conventional dual-energy typically necessitates two separate exposures to combine high- and low-energy projections. This process can result in image misalignment increased radiation doses. Herein, system two-layered scintillator was developed, featuring transparent pure organic thermally activated delayed fluorescence (TADF) materials as the absorption layer LYSO high-energy layer. Separating energy bins on detector side enables simultaneous sequential acquisition of low- projections with single exposure. achieves high resolution 23 lp/mm, surpassing most single-layer scintillators. Additionally, effectiveness this demonstrated toolbox inspection, where complex objects inside were successfully imaged differentiated, capturing all intricate details

Language: Английский

Citations

0