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学者姓名：肖家文
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摘要 ：
Rare earth-based halide double perovskites are regarded as an emerging class of X-ray scintillation materials. However, the majority of related scintillator applications are still focused on single crystal and powder systems; the application of nanocrystal (NC) scintillators is rarely reported. Here, we present the synthesis of high-purity Cs2NaTbCl6 NCs by an improved hot-injection method. Interestingly, hollow Cs2NaTbCl6 NCs are observed, the monitoring of the growth process indicates that micrometer-sized NaCl is the initial product, and then the NaCl would convert into Cs2NaTbCl6 NCs through the diffusion of Cs+ and Tb3+ into NaCl lattice, and the faster outward diffusion of Na+ results in the formation of hollow NCs. The double perovskite NCs exhibit green light emission, and the photoluminescence intensity can be significantly enhanced through Ce3+ doping. In particular, the Cs2NaTbCl6:5%Ce3+ scintillator exhibits a linear response and a low detection limit of 79.09 nGy/s when exposed to X-rays. Furthermore, a flexible scintillator film for X-ray imaging is prepared by mixing NCs with polymer, showing a high spatial resolution imaging capability of 10 lp/mm. This work provides a new strategy for hollow perovskite NCs and may shed light on the synthesis of related hollow NCs and their applications in X-ray detection.
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| GB/T 7714 | Wang, Ying , Wang, Chao , Men, Luxuan et al. Colloidal Synthesis of Hollow Double Perovskite Nanocrystals and Their Applications in X-ray Imaging [J]. | INORGANIC CHEMISTRY , 2024 , 63 (12) : 5734-5742 . |
| MLA | Wang, Ying et al. "Colloidal Synthesis of Hollow Double Perovskite Nanocrystals and Their Applications in X-ray Imaging" . | INORGANIC CHEMISTRY 63 . 12 (2024) : 5734-5742 . |
| APA | Wang, Ying , Wang, Chao , Men, Luxuan , Hu, Qingsong , Xiao, Jiawen . Colloidal Synthesis of Hollow Double Perovskite Nanocrystals and Their Applications in X-ray Imaging . | INORGANIC CHEMISTRY , 2024 , 63 (12) , 5734-5742 . |
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摘要 ：
Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high-energy physics. However, traditional inorganic scintillators encounter challenges such as high fabrication costs and low light yield. Recently, low-dimensional metal halide scintillators (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure and superior radioluminescence performance. Herein, an overview of recent advancements and proposed instructive pathways for achieving high-performance LDMHS is provided. First, the scintillation physical mechanism and emphasis on the essential requirements of scintillators for diverse applications are elucidated. Furthermore, LDMHS by the B-site, introducing recent advancements and providing insights into their characteristics is categorized. This encompasses the understanding of structure-property relationships and the routes and rules for optimizing scintillation performance. Finally, the persisting challenges in this burgeoning field and proposed potential research directions for future exploration are discussed. Low-dimensional metal halide scintillators (LDMHS) have attracted significant attention due to their remarkable radioluminescence performance and diverse structures. This review systematically summarizes recent advances in LDMHS, covering aspects such as scintillation mechanisms, requirements, research progress, and applications. Additionally, it outlines current challenges and potential directions for the future development of these materials in various applications. image
关键词 ：
X-ray detection X-ray detection metal halides metal halides low-dimensional low-dimensional scintillators scintillators
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| GB/T 7714 | Zhou, Quan , Li, Wei , Xiao, Jiawen et al. Low-Dimensional Metal Halide for High Performance Scintillators [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (38) . |
| MLA | Zhou, Quan et al. "Low-Dimensional Metal Halide for High Performance Scintillators" . | ADVANCED FUNCTIONAL MATERIALS 34 . 38 (2024) . |
| APA | Zhou, Quan , Li, Wei , Xiao, Jiawen , Li, Ang , Han, Xiaodong . Low-Dimensional Metal Halide for High Performance Scintillators . | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (38) . |
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摘要 ：
Hybrid metal halides are emerging candidates for X-ray imaging. Due to the poor uniformity, low transmittance and high light scattering of polycrystalline film scintillator screen, resulting in low resolution of X-ray imaging, it is essential a challenging to explore new large-area and single crystal scintillator with high light yield and high resolution. Herein, inch-sized Mn-based halide single crystals, (C25H22P)(2)MnCl4 and (C25H22P)(2)MnBr4, with tunable thickness films from 0.12 mm to 0.72 mm were designed and grown. The crystals of (C25H22P)(2)MnCl4 and (C25H22P)(2)MnBr4 with high photoluminescence quantum yield (PLQY) of 62.42 % and 99.10 % exhibit high light yield of 56,457 and 78,937 photons/MeV under X-ray, which is 1.7 and 2.37 times higher than that of the commercial LYSO scintillator. Both the crystals show high X-ray radiation resistance even exposed to X-ray for 60 mins with a high dose rate of 504 mGy s(-1). The high photochemical stability under the continuous UV and X-ray irradiation contributes them towards X-ray imaging. With such significant merits, the high spatial resolutions about 21.02 and 25.61 lp/mm are achieved on the (C25H22P)(2)MnCl4 and (C25H22P)(2)MnBr4 single crystal films, which demonstrates the great potential of large size single crystal screen for commercial high-resolution X-ray imaging applications.
关键词 ：
Tunable thickness Tunable thickness Scintillators Scintillators Inch-size Inch-size X-ray imaging X-ray imaging Hybrid manganese halide single-crystal films Hybrid manganese halide single-crystal films
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| GB/T 7714 | Zhou, Ming , Jiang, Hongli , Hou, Tiankuo et al. Inch-size and thickness-adjustable hybrid manganese halide single-crystalline films for high resolution X-ray imaging [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 490 . |
| MLA | Zhou, Ming et al. "Inch-size and thickness-adjustable hybrid manganese halide single-crystalline films for high resolution X-ray imaging" . | CHEMICAL ENGINEERING JOURNAL 490 (2024) . |
| APA | Zhou, Ming , Jiang, Hongli , Hou, Tiankuo , Hou, Shuo , Li, Jingyu , Chen, Xinyi et al. Inch-size and thickness-adjustable hybrid manganese halide single-crystalline films for high resolution X-ray imaging . | CHEMICAL ENGINEERING JOURNAL , 2024 , 490 . |
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摘要 ：
We report a Mn2+-activated all-inorganic 2D layered Ruddlesden-Popper (RP) perovskite Cs2CdCl4 single crystal as a highly efficient and stable X-ray scintillator. The Cs2CdCl4:10% Mn achieves a bright orange-red emission with a photoluminescence quantum yield up to 90.47%, good environmental stability, and decent thermal quenching resistance. As a scintillator, Cs2CdCl4:10% Mn shows strong X-ray absorption, ultrahigh light yield up to 88138 photons/MeV, and low detection limit of 31.04 nGy(air)/s. A 15 x 15 cm flexible scintillation screen is prepared by mixing poly(dimethylsiloxane) (PDMS) with Cs2CdCl4:Mn powder, which demonstrates superior X-ray imaging performance with a high spatial resolution of 16.1 lp mm(-1) at a modulation transfer function (MTF) = 0.2. Importantly, due to the ultrahigh X-ray sensitivity, the flexible scintillator screen achieved clear X-ray imaging at an extremely low dose of 16 mu Gy(air)/s. This successful exploitation of the 2D high light yield perovskite scintillator in flexible low-dose X-ray imaging would provide new insight into high-sensitivity X-ray detection.
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| GB/T 7714 | Wang, Chao , Yan, Zheng-Guang , Wang, Ying et al. All-Inorganic Ruddlesden-Popper Perovskite Cs2CdCl4:Mn for Low-Dose and Flexible X-ray Imaging [J]. | ACS MATERIALS LETTERS , 2024 , 6 (4) : 1429-1438 . |
| MLA | Wang, Chao et al. "All-Inorganic Ruddlesden-Popper Perovskite Cs2CdCl4:Mn for Low-Dose and Flexible X-ray Imaging" . | ACS MATERIALS LETTERS 6 . 4 (2024) : 1429-1438 . |
| APA | Wang, Chao , Yan, Zheng-Guang , Wang, Ying , Zhu, Jinlong , Peng, Chen , Qu, Yao et al. All-Inorganic Ruddlesden-Popper Perovskite Cs2CdCl4:Mn for Low-Dose and Flexible X-ray Imaging . | ACS MATERIALS LETTERS , 2024 , 6 (4) , 1429-1438 . |
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摘要 ：
High transparency Ce3+-doped dense gadolinium aluminum borosilicate (GS(x)) glass scintillator was synthesized in reducing atmosphere by melt-quenching process. The transmittance of the glasses exceeds 80%, and the light attenuation length is between 5-20 cm within the range of 400-600 nm. GS(x) glass shows an photoluminescence (PL) in range of 350-550 nm, with the strongest emission peak around 420 nm. The PL decay time of GS(x) glasses is around 37 ns, with a maximum PL quantum yield of 44.05%. The integrated X-ray excited luminescence (XEL) intensity of GS(S) glass is 52.5% compared with BGO crystal. For X-ray imaging, GS(L) glass based imaging system shows a high spatial resolution of 9 lp/mm, which is comparable to CsI:Tl X-ray detectors. Under gamma-ray, the highest light yield of GS(S) glass is 1235 ph/MeV with an energy resolution of 24.0% at 662 keV, close to that of BSO crystal. The scintillation decay time of GS(x) glasses is consisted of fast (similar to 100 ns) and slow (similar to 560 ns) components. In thermally stimulated luminescence (TSL), GS(S) glass exhibits a strong TSL peak at approximately 440 K, with low intensity shoulders at about 520 K, implying different types of defects and traps. Therefore, GS(x) glass has promising prospects for X-ray imaging and high-energy physics applications.
关键词 ：
X-ray imaging X-ray imaging High energy physics High energy physics Scintillation Scintillation Glass scintillators Glass scintillators
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| GB/T 7714 | Yang, Dong , Ge, Kun , Ban, Huiyun et al. High transparency Ce3+-doped oxyfluoride glass scintillator for X-ray imaging and γ-ray detection [J]. | CERAMICS INTERNATIONAL , 2024 , 50 (22) : 47253-47258 . |
| MLA | Yang, Dong et al. "High transparency Ce3+-doped oxyfluoride glass scintillator for X-ray imaging and γ-ray detection" . | CERAMICS INTERNATIONAL 50 . 22 (2024) : 47253-47258 . |
| APA | Yang, Dong , Ge, Kun , Ban, Huiyun , Chu, Xinyang , Liu, Shan , Qian, Sen et al. High transparency Ce3+-doped oxyfluoride glass scintillator for X-ray imaging and γ-ray detection . | CERAMICS INTERNATIONAL , 2024 , 50 (22) , 47253-47258 . |
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摘要 ：
Metal halide perovskite single crystal (SC) has attracted wide attentions in the field of photoelectric detection. All-inorganic perovskite SCs are much more stable than the hybrid counterparts, but its rapid fabrications usually end up low quality. We proposed a modified solvent-evaporation method that can rapidly obtain smooth and transparent high-quality CsPbBr3 single crystal with a surface roughness of only 5 nm in a few hours. In this method, the lattice phase of the SC and the growth rate is precisely controlled by the solution temperature, which is raised to the narrow range above the cubic-to-tetragonal phase transition temperature. This precisely controlled solvent temperature allows the CsPbBr3 SC growing immediately into cubic phase, and limits the volatilization rate of solvent, thus inhibiting the defect density. The SCs grown this way are of high crystallinity, as the half-height width of the (100) and (200) peaks of XRD rocking curve is 0.0154 degrees and 0.0176 degrees, respectively. Characterization of photoelectric properties shows great potential for applications in X-ray detection and photodetection.
关键词 ：
Single crystal Single crystal Solution growth Solution growth CsPbBr 3 CsPbBr 3 Polymer Polymer Detector Detector
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| GB/T 7714 | Yu, Changzhi , Zhang, Tianqi , Zhou, Quan et al. Fast growth of CsPbBr3 single crystal with high quality by a modified solvent-evaporation method [J]. | JOURNAL OF LUMINESCENCE , 2024 , 270 . |
| MLA | Yu, Changzhi et al. "Fast growth of CsPbBr3 single crystal with high quality by a modified solvent-evaporation method" . | JOURNAL OF LUMINESCENCE 270 (2024) . |
| APA | Yu, Changzhi , Zhang, Tianqi , Zhou, Quan , Chen, Guolong , Fan, Xiaotong , Wang, Shuli et al. Fast growth of CsPbBr3 single crystal with high quality by a modified solvent-evaporation method . | JOURNAL OF LUMINESCENCE , 2024 , 270 . |
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摘要 ：
Lead-halide perovskites have received extensive attention in X-ray imaging applications recently. However, their poor stability, lead toxicity, and strong light self-absorption seriously limit the commercial development. Here, we report a vacancy-ordered Cs2HfCl6 double perovskite for scintillators applications. The Cs2HfCl6 microcrystals (MCs) are characterized by broadband blue emission with a large Stokes shift. Joined experimental-theoretical characterizations reveal the highly localized charge distribution in Cs2HfCl6 and structural distortion of [HfCl6](2-) octahedron in the excited state favor the formation of self-trapped excitons (STEs), which contribute to the broadband emission. Benefiting from the radioluminescence of STEs with negligible self-absorption, the light yield of Cs2HfCl6 scintillator reaches 21700 photons/MeV, and the detection limit is 55 nGy(air) s(-1). Additionally, the Cs2HfCl6 scintillator exhibits extremely low hygroscopicity and good resistance to X-ray irradiation. Further, a large-area scintillator screen (20x20 cm(2)) is fabricated by combining scrape-coating and soft-pressing techniques, showing a spatial resolution of 11.2 lp mm(-1). Given the high spatial resolution and fast light decay of this scintillator screen, static X-ray imaging of bulky objects is realized, and dynamic X-ray imaging of a rotating chopping fan is demonstrated without ghosting effects. These results demonstrate the great commercial promise of Cs2HfCl6 scintillation screens for indirect X-ray detection.
关键词 ：
scintillator screens scintillator screens cesium hafnium chloride cesium hafnium chloride large-area large-area X-ray imaging X-ray imaging stability stability
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| GB/T 7714 | Zhang, Fei , Zhou, Yingchun , Chen, Zhipeng et al. Large-Area X-Ray Scintillator Screen Based on Cesium Hafnium Chloride Microcrystals Films with High Sensitivity and Stability [J]. | LASER & PHOTONICS REVIEWS , 2023 , 17 (5) . |
| MLA | Zhang, Fei et al. "Large-Area X-Ray Scintillator Screen Based on Cesium Hafnium Chloride Microcrystals Films with High Sensitivity and Stability" . | LASER & PHOTONICS REVIEWS 17 . 5 (2023) . |
| APA | Zhang, Fei , Zhou, Yingchun , Chen, Zhipeng , Niu, Xiaowei , Wang, Heyong , Jia, Mochen et al. Large-Area X-Ray Scintillator Screen Based on Cesium Hafnium Chloride Microcrystals Films with High Sensitivity and Stability . | LASER & PHOTONICS REVIEWS , 2023 , 17 (5) . |
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摘要 ：
本发明涉及一种有机无机杂化铜(I)卤化物闪烁体及其制备方法与应用，属于闪烁体材料技术领域。本发明有机无机杂化铜(I)卤化物闪烁体的化学通式为：AxCuyXz，其中A为PPh3CH3+或PPh3CH2CH3+，Cu为一价铜离子Cu+，X为卤素离子Br‑。本发明采用溶剂法制备的有机无机杂化铜(I)卤化物闪烁体更容易产生零维分子结构，晶格更松散柔软，因此激子‑声子耦合更强，带隙更窄，激子结合能更高，能够实现更高的PLQY和更大的斯托克斯位移，并且不含铅。以有机无机杂化铜(I)卤化物闪烁体制备的柔性闪烁屏可应用在X射线柔性探测中，具有较高的光产额、良好的X射线剂量线性响应和较低的探测限，能得到具有良好对比度的成像图片。
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| GB/T 7714 | 肖家文 , 张嘉倍 , 王超 et al. 一种有机无机杂化铜(I)卤化物闪烁体及其制备方法与应用 : CN202310529045.7[P]. | 2023-05-11 . |
| MLA | 肖家文 et al. "一种有机无机杂化铜(I)卤化物闪烁体及其制备方法与应用" : CN202310529045.7. | 2023-05-11 . |
| APA | 肖家文 , 张嘉倍 , 王超 , 严铮洸 . 一种有机无机杂化铜(I)卤化物闪烁体及其制备方法与应用 : CN202310529045.7. | 2023-05-11 . |
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摘要 ：
Flexible scintillator screens with environmental stability, high sensitivity, and low cost have emerged as candidates for X-ray imaging applications. Here, a large-scale and cost-efficient solution synthesis of the vacancy-ordered double perovskite Cs2ZrCl6, which is characterized by thermal activation delayed fluorescence (TADF) dominated by triplet emission under X-ray irradiation, is demonstrated. The large Stokes shift and efficient luminescence collection of TADF effectively ensure the light outcoupling efficiency. Further, flexible X-ray scintillator screens with an area of 400 cm(2) are prepared using poly(dimethylsiloxane) (PDMS) as the carrier, exhibiting excellent scintillation properties with light yields as high as 49 400 photons MeV-1, spatial resolutions up to 18 lp mm(-1) and detection limits as low as 65 nGy s(-1). Finally, the high-quality imaging results of non-planar and dynamic objects by such screens are demonstrated. It is believed that the explored Cs2ZrCl6@PDMS flexible scintillator screens would offer a big step toward expanding the application range of scintillators in different environments.
关键词 ：
2ZrCl 2ZrCl large-area screens large-area screens (6) (6) Cs Cs stability stability flexible X-ray scintillator screens flexible X-ray scintillator screens thermal activation delay fluorescence thermal activation delay fluorescence
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| GB/T 7714 | Zhang, Fei , Zhou, Yingchun , Chen, Zhipeng et al. Thermally Activated Delayed Fluorescence Zirconium-Based Perovskites for Large-Area and Ultraflexible X-ray Scintillator Screens [J]. | ADVANCED MATERIALS , 2022 , 34 (43) . |
| MLA | Zhang, Fei et al. "Thermally Activated Delayed Fluorescence Zirconium-Based Perovskites for Large-Area and Ultraflexible X-ray Scintillator Screens" . | ADVANCED MATERIALS 34 . 43 (2022) . |
| APA | Zhang, Fei , Zhou, Yingchun , Chen, Zhipeng , Wang, Meng , Ma, Zhuangzhuang , Chen, Xu et al. Thermally Activated Delayed Fluorescence Zirconium-Based Perovskites for Large-Area and Ultraflexible X-ray Scintillator Screens . | ADVANCED MATERIALS , 2022 , 34 (43) . |
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摘要 ：
The incorporation of lanthanide ions (Ln(3+)) has been shown to be an effective strategy to tune the luminescence properties in lead-free halide double perovskites. However, most Ln(3+)-doped double perovskites exhibit a low luminescence efficiency and a high excitation energy and/or require doping with multiple ions which result in complex compositions. Herein, we demonstrate that the Ln(3+) doping (Ln = Yb, Er, Nd) in the layered double perovskite Cs4MnBi2Cl12 enables multimodal luminescence, that is, the orange-red emission from the d-d transition of Mn2+, the efficient ultraviolet light excited near-infrared (NIR) emissions of Ln(3+) and the upconversion emissions in both Yb- and Yb/Er-doped systems. In addition, the NIR emissions of Ln(3+) can also be excited by blue and green light benefiting from the energy transfer from Mn2+ to Ln(3+). Finally, taking advantage of the multimodal luminescence in the Ln(3+)-doped Cs4MnBi2Cl12 phosphor, a preliminary anti-counterfeiting application is demonstrated. We highlight that the particular chemical composition (comprising Bi3+ and Mn2+) and the sandwich-type Bi-Mn-Bi layered crystal structure facilitate the light absorption and the energy transfer from Bi3+ to Ln(3+) and Mn2+ to Ln(3+), demonstrating the importance of the rational selection and design of double perovskite host materials for Ln(3+) doping.
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| GB/T 7714 | Li, Jingyu , Xiao, Jiawen , Lin, Taifeng et al. Lanthanide doping enabled multimodal luminescence in layered lead-free double perovskite Cs4MnBi2Cl12 [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (19) : 7626-7632 . |
| MLA | Li, Jingyu et al. "Lanthanide doping enabled multimodal luminescence in layered lead-free double perovskite Cs4MnBi2Cl12" . | JOURNAL OF MATERIALS CHEMISTRY C 10 . 19 (2022) : 7626-7632 . |
| APA | Li, Jingyu , Xiao, Jiawen , Lin, Taifeng , Yan, Zhengguang , Han, Xiaodong . Lanthanide doping enabled multimodal luminescence in layered lead-free double perovskite Cs4MnBi2Cl12 . | JOURNAL OF MATERIALS CHEMISTRY C , 2022 , 10 (19) , 7626-7632 . |
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