Dual discrimination of fast neutrons from strong γ noise using organic single-crystal scintillator

Sun, Qisheng; Hao, Zirui; Li, Jing; Liu, Zheyuan; Wang, Hongwei; Zhang, Xiaotao; Li, Liqiang; Dong, Huanli; Hu, Wenping

doi:10.1016/j.matt.2022.10.010

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…[ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ] Currently, researchers in various disciplines are dedicating tremendous efforts to exploring and optimizing the composition and synthesis of perovskite and ceramic materials to obtain high‐performance scintillators, but the inherent shortcomings of their harsh preparation conditions, poor air and light stability, and high fabrication cost limits their sustainable development. [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] Organic scintillators, in contrast, exhibit low toxicity, high stability, good mechanical flexibility, and abundant radioluminescence (RL) mechanisms. [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ] However, the low X‐ray absorption cross‐section and inefficient exciton utilization efficiency of most organic scintillators lead to poor X‐ray sensitivity and low spatial‐imaging resolution.…”

Section: Introductionmentioning

confidence: 99%

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

et al. 2023

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X‐ray imaging technology is critical to numerous different walks of daily life, ranging from medical radiography and security screening all the way to high‐energy physics. Although several organic chromophores are fabricated and tested as X‐ray imaging scintillators, they generally show poor scintillation performance due to their weak X‐ray absorption cross‐section and inefficient exciton utilization efficiency. Here, a singlet fission‐based high‐performance organic X‐ray imaging scintillator with near unity exciton utilization efficiency is presented. Interestingly, it is found that the X‐ray sensitivity and imaging resolution of the singlet fission‐based scintillator are dramatically improved by an efficient energy transfer from a thermally activated delayed fluorescence (TADF) sensitizer, in which both singlet and triplet excitons can be efficiently harnessed. The fabricated singlet fission‐based scintillator exhibits a high X‐ray imaging resolution of 27.5 line pairs per millimeter (lp mm−1), which exceeds that of most commercial scintillators, demonstrating its high potential use in medical radiography and security inspection.

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Section: Introductionmentioning

confidence: 99%

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

et al. 2023

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“…This observation further substantiates the efficacy of our strategy, which involves the integration of molecular optimization with crystal engineering, as evidenced by the comparison of TPA cross‐sections among the materials. The materials can also be excited by other means, such as X‐ray (Figure S63) [32–34] . And this HOFs design strategy can be further introduced into the thermal activation delayed fluorescence (TADF) or phosphorescent systems to potentially achieve more ground‐breaking results.…”

Section: Resultsmentioning

confidence: 99%

“…The materials can also be excited by other means, such as X-ray (Figure S63). [32][33][34] And this HOFs design strategy can be further introduced into the thermal activation delayed fluorescence (TADF) or phosphorescent systems to potentially achieve more ground-breaking results.…”

Section: Methodsmentioning

confidence: 99%

Tetraphenylethylene‐Based Hydrogen‐Bonded Organic Frameworks (HOFs) with Brilliant Fluorescence

Wang,

Zhang,

Wang

et al. 2023

Angew Chem Int Ed

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By synergistically employing four key strategies: (I) introducing tetraphenylethylene groups as the central core unit with aggregation‐induced emission (AIE) properties, (II) optimizing the π‐conjugated length by extending the building block branches, (III) incorporating flexible groups containing ethylenic bonds, and (IV) applying crystal engineering to attain dense stacking mode and highly twisty conformation, we successfully synthesized a series of hydrogen‐bonded organic frameworks (HOFs) exhibiting exceptional one/two‐photon excited fluorescence. Notably, when utilizing the fluorescently superior building block L2, HOF‐LIFM‐7 and HOF‐LIFM‐8 exhibiting high quantum yields (QY) of 82.1% and 77.1%, and ultrahigh two‐photon absorption (TPA) cross‐sections of 148959.5 GM and 123901.1 GM were achieved. These materials were successfully employed in one and two‐photon excited lysosome‐targeting cellular imaging. It is believed that this strategy, combining building block optimization and crystal engineering, holds significant potential for guiding the development of outstanding fluorescent HOF materials.

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

Peng,

Qiu,

et al. 2024

Adv Funct Materials

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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, the inevitable heteromorphic homologs in MHs (e.g., Copper‐based MHs (Cu‐MHs): CsCu2X3∖Cs3Cu2X5) and change of film structural backbone will result in spectral hybridization (phase purity), and the film eventually detaches (lattice mismatches). Herein, a single‐source vacuum evaporation method to prepare a thick film (≈10 µm) of Cu‐MHs (as an example) scintillators is realized: 1) Presynthesis of pure phase materials by solution method with a protective agent to ensure phase purity without precise control of component ratios in evaporation process; 2) One‐shot formation of film structural backbone avoids stress accumulation and utilize the longitudinal growth characteristics of crystalline films to obtain crystal orientations with better optical outputs. Finally, the films obtained have a light yield comparable to a partially single‐crystal (53 983 photons MeV−1) and an imaging resolution (14.1 lp mm−1) comparable to the partial template method. The detection system based on the prepared Cu‐MHs scintillator thick films exhibits good response speed and linearity in response to different X‐ray radiation intensities and exposure times. The method will further drive the application of MHs is believed.

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Dual discrimination of fast neutrons from strong γ noise using organic single-crystal scintillator

Cited by 6 publications

References 41 publications

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

Tetraphenylethylene‐Based Hydrogen‐Bonded Organic Frameworks (HOFs) with Brilliant Fluorescence

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

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Dual discrimination of fast neutrons from strong γ noise using organic single-crystal scintillator

Cited by 6 publications

References 41 publications

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

Tetraphenylethylene‐Based Hydrogen‐Bonded Organic Frameworks (HOFs) with Brilliant Fluorescence

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

Contact Info

Product

Resources

About

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