Recent Developments in Halide Perovskite Nanocrystals for Indirect X‐ray Detection

Advanced Materials Technologies, Journal Year: 2024, Volume and Issue: 9(20)

Published: May 26, 2024

Abstract Metal halide perovskites are revolutionizing X‐ray detection through a combination of low cost, solution processing, favorable optoelectronic properties, and high stopping power for high‐energy ionizing radiation. While perovskite single crystals polycrystalline wafers considered direct converters, most medical applications based on scintillators that shift radiation into the visible. Several materials market, but demonstrations CsPbBr 3 nanocrystals, possibly embedded in matrix material or combined with organic molecules as luminescent species, highlight their competitiveness established terms radioluminescence yield transient behavior. Major hurdles nanocrystal must overcome environmental stability toxicity. there still few examples high‐performance lead‐free scintillators, microcrystalline emerging promising reduced toxicity, significant Stokes shifts to avoid reabsorption emission thick films. Thus, near future scintillator will primarily be adoption recipes proven properties form. The colloidal solutions facilitate large‐scale printing homogeneous scattering‐free films obtain contrast spatial resolution images by scintillation.

Language: Английский

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Organic–Inorganic Hybrid Mn‐Based Transparent Glass for Curved X‐Ray Scintillation Imaging

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 12(11)

Published: Dec. 25, 2023

Abstract The current mainstream planar X‐ray imaging techniques face significant challenges for accurately capturing the internal structure of curved objects, since variable distances between objects and flat‐panel scintillation screen cannot eliminate distortion in imaging. Though large‐area transparent screens are much more desirable. Here, organic–inorganic hybrid Mn‐based single crystals ([CH 3 Ph P] 2 MnX 4 , X = Cl, Br, I) exhibiting high photoluminescence quantum yield (PLQY) low melting temperature have been employed to prepare glass application through a low‐temperature strategy. [CH MnBr ‐glass shows PLQY (47.8%), high‐resolution performance (12.3 lp mm −1 ), limit detection (25.33 nGy s impressive irradiation stability (102 Gy). Furthermore, high‐contrast at dose (6.865 µGy per exposure, 14.5 times lower than chest radiograph) is achieved. Based on transition ( T g 53.6 °C) easy‐shapeable properties scintillator, with series sizes Φ 2×4 – 8×4 cm can be easily fabricated show quality. These findings provide paradigm future research shapeable scintillators, unlocking new possibilities 3D

Language: Английский

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Customizable Scintillator of Cs₃Cu₂I₅:2% In⁺@Paper for Large‐Area X‐Ray Imaging

Advanced Science, Journal Year: 2023, Volume and Issue: 10(34)

Published: Oct. 23, 2023

High-resolution X-ray imaging is increasingly required for medical diagnosis and large-area detection. However, the issues of scattering optical crosstalk are limiting spatial resolution indirect imaging. In this study, a feasible efficient strategy proposed to in situ synthesize flexible Cs3 Cu2 I5 :2%In+ @paper as superior scintillator film, which can be scaled up an ultra-large area 4800 cm2 . The as-obtained performs fascinating photoluminescence quantum efficiency 88.14%, steady state light yield 70169 photons/MeV, 15 lp mm-1 Moreover, suppressed physical corresponding film demonstrated. Accordingly, work explores fabrication customizable scintillation films with large high-resolution

Language: Английский

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Scintillation Performance of Mn(II)‐Doped Cs₂NaBiCl₆ Double Perovskite Nanocrystals for X‐Ray Imaging Applications

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 12(9)

Published: Dec. 18, 2023

Abstract Lead‐free halide perovskite‐based X‐ray scintillators with high light yield (LY) and low detection limit (LOD) have become a growing subject of research interest due to their promising application in wide range areas, from security healthcare. Herein, modified hot injection method is employed synthesize Mn(II)‐doped Cs 2 NaBiCl 6 double perovskite nanocrystals (DPNCs) examine scintillating properties for imaging detection. The DPNCs exhibit broad orange photoluminescence (PL) band at 586 nm PL quantum 10.6%, attributed the 4 T 2g (4G) → A 1g (6S) transition Mn 2+ . Temperature‐dependent time‐resolved spectra 4.04% demonstrate that emission intensity initially reaches maximum subsequently decreases, while decay lifetimes monotonically decrease increasing temperature. This inconsistency can be effect [MnCl ] 4− octahedra electron‐phonon coupling elevated temperatures. Further, 0.05 mm thick :4.04%Mn@poly(methyl methacrylate) scintillator film synthesized an LY 28,350 photons MeV −1 LOD 45.2 nGy air s Additionally, this demonstrates good performance spatial resolution 14.76 line pairs (lp) shows exceptional stability under prolonged exposure.

Language: Английский

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Online Radiation Beam Tracking by Using Full‐Inorganic Scintillating Fibers

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(10)

Published: Feb. 12, 2024

Abstract Effective online monitoring of the spatial distribution high‐energy radiation is significant importance in various fields such as medical imaging, physics, and homeland security. However, achieving detectors with both high sensitivity minimal disturbance an enormous challenge. The present study introduces a solution to this bottleneck issue through development full‐inorganic scintillating fiber, successfully demonstrating its application constructing device. activated Ce 3+ fabricated using melt‐in‐tube approach, lightweight density 2.5 g cm −3 exhibits efficient emission light yield 4000 photons MeV −1 . These characteristics enable achievement detection while keeping incident beam at minimum. Furthermore, 2D 3D monitors are constructed based on these fibers, facilitating monitoring. findings demonstrate that fibers devices offer synergistic combination negligible disturbances. This progress not only novel fiber for but also suggests promising applications nuclear where tracking essential.

Language: Английский

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HCOO⁻ Doping‐Induced Multiexciton Emissions in Cs₃Cu₂I₅ Crystals for Efficient X‐Ray Scintillation

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: April 9, 2024

Self-trapped exciton (STE) luminescence, typically associated with structural deformation of excited states, has attracted significant attention in metal halide materials recently. However, the mechanism multiexciton STE emissions certain crystals remains largely unexplored. This study investigates dual luminescence HCOO

Language: Английский

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Photoluminescence-Tunable organic phosphine cuprous halides clusters for X-ray scintillators and white light emitting diodes

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153077 - 153077

Published: June 12, 2024

Language: Английский

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Temperature-Adaptive Organic Scintillators for X-ray Radiography

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

Organic phosphorescence or thermally activated delayed fluorescence (TADF) scintillators, while effective in utilizing triplet excitons, are sensitive to temperature changes, which can impact radioluminescence performance. In this study, we have developed a type of temperature-adaptive organic scintillator with and TADF dual emission. These scintillators automatically switch modes enabling efficient from 77 400 K. The highest photoluminescence quantum yield light 83.2% 78,229 ± 562 photons MeV

Language: Английский

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Moisture‐Resistant Orange Emitters with Near‐Unity Quantum Yield from Mn²⁺ Alloyed Vacancy‐Ordered Quadruple Perovskites

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: April 9, 2024

Abstract Mn 2+ ‐doped metal halide perovskites present remarkable optical properties in optoelectronic applications, although the realization of high efficiency and stability is still a challenge. In this work, series highly efficient stable orange‐emitting alloyed Cs 4 Cd 1‐ x Bi 2 Cl 12 single crystals are successfully synthesized via hydrothermal reaction. Combined with crystal structure spectral characterization at 7 K, site occupation defect emission systematically discussed. Benefiting from effective [BiCl 6 ] 3− →[MnCl 4− energy transfer lattice distortion, these exhibit maximum internal external quantum yield ≈97% ≈65% 35% heavy doping level. Interestingly, ‐alloyed remarkably waterproof stability, no decrease intensity observed after immersion deionized water for h. After soaking 100 days, can maintain 44%, implying good chemical moisture resistance due to formation protective BiOCl layer. This work provides new insights into optimization mechanism luminescence overcoming downside their waterproofing humid conditions.

Language: Английский

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Metal halide perovskite polymer composites for indirect X-ray detection

Nanoscale, Journal Year: 2024, Volume and Issue: 16(38), P. 17654 - 17682

Published: Jan. 1, 2024

With versatile synthesis routes and adaptable structures, metal halide perovskites show excellent scintillating performance, but stability issues remain. Perovskite-polymer composites boost stability, enabling advanced radiation detection.

Language: Английский

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