Two-dimensional BA<sub>2</sub>PbBr<sub>4</sub>-based wafer for X-rays imaging application

Xu, Youkui; Li, Yingtao; Wang, Qian; Chen, Huanyu; Lei, Yutian; Feng, Xuefeng; Ci, Zhipeng; Jin, Zhiwen

doi:10.1039/d2qm00233g

Cited by 13 publications

(9 citation statements)

References 59 publications

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“…The superb penetration ability of X-ray makes X-ray imaging widely used and developed in fields such as medical diagnosis, industrial non-destructive detection, safety inspection, and nuclear safety detection. − As an energy conversion layer in X-ray imaging systems, scintillators can effectively convert high-energy rays into visible light. − Common commercial scintillators are some inorganic solid single crystals, such as NaI: TI, CsI: TI, Bi 4 Ge 3 O 12 (BGO), CdWO 4 (CWO), etc. − However, there are problems such as high process costs, difficulties in large-size preparation, and poor moisture resistance. − Therefore, in recent years, a new generation of scintillatorsmetal halide materialsgradually has the potential to replace traditional scintillators, receiving more and more research and attention. − Among them, copper-based metal halide is one of the most widely studied lead-free metal halide scintillators due to its unique self-trapped exciton (STE) emission and performance advantages such as high photoluminescence quantum yield (PLQY), small self-absorption, and high X-ray absorption. − …”

Section: Introductionmentioning

confidence: 99%

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

Zhou

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

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

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Section: Introductionmentioning

confidence: 99%

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

Zhou

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

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“…Owing to the same situation, similar results were observed for the BA 2 PbI 4 and BA 2 PbI 4 /BA 2 MAPb 2 I 7 perovskites, as shown in Figure 2 reported that high intensity XRD peaks of BA2MAPb2I7 crystals were obtained at the angles of 5.09°, 9.62°, 14.12°, 18.65°, 23.23°, 27.80° and 32.44° [33]. In addition, due to the continuity of the inorganic-organic-inorganic layer in the crystal structure of 2D OHP single crystals, the angle values at which XRD peaks increase regularly according to the d gap distance between the crystal planes [34][35][36]. Accordingly, the distance between the crystal planes of the synthesized 2D OHP single crystals was measured to be d=1.964nm and, using the Bragg equation (n𝜆 = 2𝑑𝑠𝑖𝑛𝜃), it was calculated that the difference between the angle values between each peak should be approximately 2𝜃=4.5°, which is consistent with the obtained results.…”

Section: Resultsmentioning

confidence: 95%

FACILE AND CONTROLLED SYNTHESIS OF 2D ORGANOMETAL HALIDE PEROVSKITE PURE BA2MAPb2I7 AND HETEROSTRUCTURED BA2PbI4/BA2MAPb2I7 SINGLE CRYSTALS

Yilmaz

Yeltik

2023

Journal of Scientific Reports-A

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Two dimensional (2D) organometal halide perovskites (OHPs) have attracted intensive interest for their diverse optoelectronic applications. However, a practical and controllable solution-based way particularly for the synthesis of pure BA2MAPb2I7 and heterostructured BA2PbI4/BA2MAPb2I7 single crystals, which are of great importance for high performance photodetectors, is still lacking. In this study, we report the efficient synthesis route of large-area high-quality BA2MAPb2I7 and BA2PbI4/BA2MAPb2I7 single crystals. We show that the combined method of solution temperature lowering and limiting reagent approaches yields rapid and controllable synthesis. In addition, the correct determination of the BAI:MAI:PbI2 molarity ratios in the synthesis process was revealed to be highly significant. These results provide fundamental insight and useful guideline for obtaining the presented 2D OHPs with regard to high practicality and controllability.

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“…The average lifetime of BM 2 PbBr 4 was only 0.97 ns, which is much shorter than all previous reported perovskite single crystals and nanocrystals, such as CsPbBr 3 nanocrystals (44.6 ns), CsPbBr 3 nanosheets (8 ns), and BA 2 PbBr 4 single crystal (6.82 ns). [19,20,35] Moreover, we also measured the low temperature time dependent photoluminescence spectra to exclude the influence of non-radiative recombination (Figure 3f). The decay curves at 80 K follow single exponential decay behavior.…”

Section: Resultsmentioning

confidence: 99%

Sub‐Nanosecond 2D Perovskite Scintillators by Dielectric Engineering

et al. 2023

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particles directly determines the performance of time resolution, response rate, and counting ability of radiation detectors. For example, dynamic high speed X-ray imaging requires frame rates of 2 ns (GHz) and thus the scintillator with sub-nanosecond response is in urgent demand. [3] Sub-nanosecond scintillator is also highly needed in PET detector module to increase the accidental coincidence rate, without image reconstruction to approaching the recognized goals of 10 ps time resolution. [2,7,8] Some nuclear physics experiments with very high count rates required sub-nanosecond scintillation to avoid signal piling up. [9] BaF 2 , CsCl, and ZnO:Ga scintillators have demonstrated sub-nanosecond response speed, with the short lifetime as 0.8, 0.9, and 0.7 ns, respectively. [10,11] However, BaF 2 and CsCl suffered from longstanding weakness of extra-low light yield (<1500 photons MeV −1 ) due to the inefficient core-valence transitions and also an undesirable slow lifetime component (few microseconds). [10] Besides the low light yield, ZnO: Ga scintillator was also limited by the manufacturing difficulty in bulk crystal and high production cost. [11,12] Therefore, new sub-nanosecond scintillator materials with considerable light yield urgently need to be explored. Perovskite materials have emerged as a new family of radiation scintillators with tunable wavelength andPerovskite materials have demonstrated great potential for ultrafast scintillators with high light yield. However, the decay time of perovskite still cannot be further minimized into sub-nanosecond region, while sub-nanosecond scintillators are highly demanded in various radiation detection, including high speed X-ray imaging, time-of-flight based tomography or particle discrimination, and timing resolution measurement in synchrotron radiation facilities, etc. Here, a rational design strategy is showed to shorten the scintillation decay time, by maximizing the dielectric difference between organic amines and Pb-Br octahedral emitters in 2D organic-inorganic hybrid perovskites (OIHP). Benzimidazole (BM) with low dielectric constant inserted between [PbBr 6 ] 2− layers, resulting in a surprisingly large exciton binding energy (360.3 ± 4.8 meV) of 2D OIHP BM 2 PbBr 4 . The emitting decay time is shortened as 0.97 ns, which is smallest among all the perovskite materials. Moreover, the light yield is 3190 photons MeV −1 , which is greatly higher than conventional ultrafast scintillator BaF 2 (1500 photons MeV −1 ). The rare combination of ultrafast decay time and considerable light yield renders BM 2 PbBr 4 excellent performance in γ-ray, neutron, α-particle detection, and the best theoretical coincidence time resolution of 65.1 ps, which is only half of the reference sample LYSO (141.3 ps).

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Two-dimensional BA₂PbBr₄-based wafer for X-rays imaging application

Abstract: As one of the most promising candidates for X-ray imaging materials, perovskite has received extensive attention. However, the poor stability and undesirable ion migration are still the hindrance on its...

Cited by 13 publications

References 59 publications

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

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

FACILE AND CONTROLLED SYNTHESIS OF 2D ORGANOMETAL HALIDE PEROVSKITE PURE BA2MAPb2I7 AND HETEROSTRUCTURED BA2PbI4/BA2MAPb2I7 SINGLE CRYSTALS

Sub‐Nanosecond 2D Perovskite Scintillators by Dielectric Engineering

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Two-dimensional BA2PbBr4-based wafer for X-rays imaging application

Abstract: As one of the most promising candidates for X-ray imaging materials, perovskite has received extensive attention. However, the poor stability and undesirable ion migration are still the hindrance on its...

Cited by 13 publications

References 59 publications

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

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

FACILE AND CONTROLLED SYNTHESIS OF 2D ORGANOMETAL HALIDE PEROVSKITE PURE BA2MAPb2I7 AND HETEROSTRUCTURED BA2PbI4/BA2MAPb2I7 SINGLE CRYSTALS

Sub‐Nanosecond 2D Perovskite Scintillators by Dielectric Engineering

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Product

Resources

About

Two-dimensional BA₂PbBr₄-based wafer for X-rays imaging application

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

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