Transparent Organic and Metal Halide Tandem Scintillators for High-Resolution Dual-Energy X-ray Imaging

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(6), P. 2505 - 2512

Published: May 8, 2023

Dual-energy X-ray imaging (DEXI) is a cutting-edge technology that provides more detailed material-specific information than the traditional single-energy strategy. Herein, we designed and fabricated top-filter-bottom (TFB) sandwich structure scintillator for high-resolution DEXI within single exposure. More specifically, low- high-energy photons were sequentially absorbed by top bottom scintillators efficiently converted into their corresponding emission colors. By discriminating between these different spectra of transparent TFB scintillator, can provide not only unique energy but also an exceptional resolution approximately 18 lp/mm on stacked images surpasses most reported single-layer organic- metal halide-based scintillators. The conceptual demonstrations decomposition reconstruction in realized several biological objects. This breakthrough research paves way development architectures specifically DEXI.

Language: Английский

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Suppression of Ionic and Electronic Conductivity by Multilayer Heterojunctions Passivation Toward Sensitive and Stable Perovskite X‐Ray Detectors

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(35)

Published: May 11, 2023

Abstract Organic‐inorganic hybrid perovskites are promising candidates for direct X‐ray detection and imaging. The relatively high dark current in perovskite single crystals (SCs) is a major limiting factor hindering the pursuit of performance stability enhancement. In this study, contribution disentangled from electronic ( σ e ) ionic conductivity i shows that dominates MAPbBr 3 SCs. A multilayer heterojunctions passivation strategy developed suppresses not only by two orders magnitude but also 1.6. passivate halide vacancy defects increase electron hole injection barrier inducing surface p‐type doping . This enables SC detectors to obtain sensitivity 19 370 µC Gy air −1 cm −2 under electric field 100 V , record bromine self‐powered devices, low limit 42.3 nGy s unencapsulated demonstrate stable baseline after storage 210 days outstanding operational upon irradiation with an accumulated dose up 1944 mGy

Language: Английский

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High-Quality Cs₃Cu₂I₅@PMMA Scintillator Films Assisted by Multiprocessing for X-ray Imaging

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(32), P. 38741 - 38749

Published: Aug. 3, 2023

In recent years, novel metal halide scintillators have shown great application potential due to their tunable emission wavelength, high X-ray absorption, and luminescence efficiency. However, poor stability complex device packaging remain key issues for scintillators, making it difficult achieve high-resolution flexible imaging applications. To address the above issues, a multiprocessing strategy was introduced prepare Cs3Cu2I5@PMMA scintillator films long-term stable application, mainly undergo different annealing treatments make Cs3Cu2I5 crystals accurately nucleate then grow in-situ in PMMA matrix. Then, series of characterization results illustrate that prepared crystallinity, uniform size, excellent flexibility, photoluminescence (PL) radioluminescence (RL) performance, capability. Most importantly, can not only provide clear accurate recognition objects with structures but also maintain quality within 60 days imaging. Therefore, we provided an effective producing high-quality meet multidimensional needs new generation scintillators.

Language: Английский

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Guanidinium‐Based Manganese(II) Bromide with High Glass‐Forming Ability for Thermoplastic Curved X‐ray Imaging

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(7)

Published: Feb. 25, 2024

Abstract The development of large‐area transparent organic‐inorganic hybrid metal halide (OIMH) scintillation screens is restricted by the anisotropic single‐crystal growth, numerous grain boundaries in polycrystalline wafers, and inhomogeneous dispersion perovskite‐polymer composite films. crystal‐glass phase transition OIMH materials may provide a promising solution for above significant challenges. Herein, new class amorphous guanidinium‐based manganese bromide glasses, (DPG) 2 MnBr 4 (DOTG) (DPG = 1,3‐diphenylguanidinium, DOTG 1,3‐di‐o‐tolylguanidinium), are synthesized through low‐temperature melt‐quenching process. shows impressive glass‐forming ability because large viscosity ( η ) at melting temperature T m 3426 mPa·s) small fragility index 52.35), which can be potential glass scintillator. (e.g., 13 cm × cm) scintillator high light transmittance > 80%, low detection limit 237.3 nGy s −1 X‐ray imaging spatial resolution 12 lp mm . Interestingly, < 40 °C gives unique thermoplastic properties, allowing it to conform irregularly shaped objects reduce distortion imaging.

Language: Английский

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Through‐Space Charge‐Transfer Organogold(III) Complexes Enable High‐Performance X‐ray Scintillation and Imaging

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: March 2, 2024

Abstract Organic scintillators have recently attracted growing attention for X‐ray detection in industrial and medical applications. However, these materials still face critical obstacles of low attenuation efficiency and/or inefficient triplet exciton utilization. Here we developed a new category organogold(III) complexes, Tp‐Au‐1 Tp‐Au‐2 , through adopting through‐space interaction motif to realize high efficient harvesting excitons emission. Thanks the charge transfer process, this panel complexes achieved higher photoluminescence quantum yield shorter radiative lifetimes compared with through‐bond reference complexes. Inspiringly, exhibited polarity‐dependent emission origins: thermally activated delayed fluorescence phosphorescence. Under irradiation, manifested intense radioluminescence together record‐high scintillation light 77,600 photons MeV −1 organic scintillators. The resulting scintillator screens demonstrated high‐quality imaging >16.0 line pairs mm spatial resolution, outstripping most inorganic This finding provides feasible strategy design superior

Language: Английский

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Organic molecules with dual triplet‐harvesting channels enable efficient X‐ray scintillation and imaging

Aggregate, Journal Year: 2024, Volume and Issue: 5(3)

Published: Jan. 4, 2024

Abstract Organic scintillators have recently gained considerable attentions in X‐ray detection for their potential applications biomedical radiograph and security inspection. However, the weak absorption and/or inefficient exciton utilization limited development commercialization of organic scintillators. Currently, high‐performance are scarce with dual triplet‐harvesting channels not been explored before. Here, we develop several proof‐of‐concept sulfone‐based molecules, C1–C7 , using different alkoxy chains to manipulate molecular packing mode. These materials exhibit thermally activated delayed fluorescence (TADF) room‐temperature phosphorescence (RTP) aggregated state. Inspiringly, these molecules display distinct radioluminescence under stimulation. Among them, C6 behaves highest light yield 16,558 photons MeV −1 . Moreover, clear images demonstrated both state single‐molecule level. High spatial resolutions 15.0 10.6 line pairs per millimeter (lp mm ) achieved rigid flexible scintillator screens, exceeding most reported conventional inorganic results highlight great TADF RTP nature efficient scintillation imaging.

Language: Английский

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Photophysical Properties of Copper Halides with Strongly Confined Excitons and Their High‐Performance X‐Ray Imaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 25, 2024

Abstract Copper halides, a new class of attractive and potential scintillators, have attracted tremendous attention in X‐ray imaging. However, the ambiguity surrounding their exciton properties unclear effect crystal structure on photophysical performance hinder an in‐depth understanding luminescence mechanism further application imaging field. Herein, copper halide scintillators Cs 3 Cu 2 X 5 (X = I, Br, Cl) with 0D is prepared, are revealed using both theoretical calculation experimental verification. The small Bohr diameter together high binding energy can cause to hold strongly confined excitons lack quantum‐size effects. materials exhibit structural framework soft lattice Frenkel strong confinement effects, resulting self‐trapped excitons. In particular, I demonstrated as efficient scintillator radioluminescence efficiency spatial resolution ≈106 µm radiography, which primarily attributed improve radiative recombination probability electron‐hole pairs. Overall, this work provides pathway for developing performance.

Language: Английский

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Low‐Dimensional Metal Halide for High Performance Scintillators

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 25, 2024

Abstract Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high‐energy physics. However, traditional inorganic encounter challenges such as high fabrication costs low light yield. Recently, low‐dimensional metal halide (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure superior radioluminescence performance. Herein, an overview of recent advancements proposed instructive pathways for achieving high‐performance LDMHS is provided. First, the scintillation physical mechanism emphasis on essential requirements applications are elucidated. Furthermore, classified according B‐site cations, respective characteristics introduced. This encompasses understanding structure‐property relationships routes rules optimizing Finally, persisting this burgeoning field potential research directions future exploration discussed.

Language: Английский

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Single‐Source Evaporated High‐Quality Single‐Phase Cs₃Cu₂I₅ Scintillator Films for High Performance X‐Ray Imaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: March 29, 2024

Abstract Vacuum‐evaporated metal halides (MHs) scintillator thick films have received much attention in the X‐ray imaging field due to their excellent light yield and uniform large‐area preparation. However, inevitable heteromorphic homologs MHs (e.g., Copper‐based (Cu‐MHs): CsCu 2 X 3 ∖Cs Cu 5 ) change of film structural backbone will result spectral hybridization (phase purity), eventually detaches (lattice mismatches). Herein, a single‐source vacuum evaporation method prepare (≈10 µm) Cu‐MHs (as an example) scintillators is realized: 1) Presynthesis pure phase materials by solution with protective agent ensure purity without precise control component ratios process; 2) One‐shot formation avoids stress accumulation utilize longitudinal growth characteristics crystalline obtain crystal orientations better optical outputs. Finally, obtained comparable partially single‐crystal (53 983 photons MeV −1 resolution (14.1 lp mm partial template method. The detection system based on prepared exhibits good response speed linearity different radiation intensities exposure times. further drive application believed.

Language: Английский

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Thermal‐Adaptive Photonic MOFs for High‐Performance X‐ray Scintillator

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

Published: March 3, 2025

Abstract Dynamic responsive scintillating materials play a significant role in advanced radiation detection technology. However, the issues such as thermal quenching, uncontrollable structure, and unsatisfactory cost, still remain obstacles to diversified development of recent scintillators. Herein, strategy is proposed by assembling well‐designed inorganic organic building units with low cost construct series novel lanthanide MOFs for thermal‐adaptive X‐ray scintillators (TAXS). Based on delicate energy level design, as‐obtained TAXS present ultra‐high relative light yield (max ≈49 700 photons MeV −1 ), tunable luminescence (from green red band), dose rate limit (min ≈118.7 nGy air s ). Importantly, these exhibit unique behaviors including thermal‐facilitated metal‐ligand distance contraction X‐ray‐induced carrier generation, resulting obvious enhanced radio‐luminescence. They maintain perfect linear response (R 2 > 99.8%) excellent stability (>95% after 215 Gy irradiation) during heat treatment. Both TAXS‐based membranes high imaging resolution ≈24 lp mm ) inks customizable printing demonstrate potential work normally at elevated temperatures. Such supports photonic functional fabricate high‐performance harsh condition services.

Language: Английский

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