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学者姓名：肖家文
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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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摘要 ：
Low-dimensional perovskite halides have shown a great potential as X-ray detection materials because of efficient exciton emissions originating from strongly spatially localized charge carriers. Nonetheless, most of them have a scintillation yield far below their theoretical limits. Here, it is found that the harvesting efficiency of produced charge carriers can be significantly enhanced via a small amount of In+ doping in these highly localized structures. A bright and sensitive zero-dimensional Cs3Cu2I5:In+ halide with efficient and tunable dual emission is reported. The radioluminescence emission of Cs3Cu2I5:In+ crystals under X-ray excitation consists of a self-trapped exciton emission at 460 nm and an In+-related emission at 620 nm at room temperature. In+ doping enhances the photoluminescence quantum efficiency (PLQY) of Cs3Cu2I5 from 68.1% to 88.4%. Benefiting from the higher PLQY, Cs3Cu2I5:In+ can achieve an excellent X-ray detection limit of 96.2 nGy(air ) s(-1), and a superior scintillation yield of 53 000 photons per MeV, which is comparable to commercial CsI:Tl single crystals. As a result, a remarkable X-ray imaging resolution of 18 line pairs mm(-1) is demonstrated, which is so far a record resolution for single crystal perovskite-based flat-panel detectors. These results highlight the importance of efficient harvesting of carriers (and excitons) in low-dimensional perovskites for radiation detection applications.
关键词 ：
X-ray imaging X-ray imaging low-dimensional perovskite low-dimensional perovskite scintillator scintillator single crystal single crystal
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| GB/T 7714 | Wang, Qian , Zhou, Quan , Nikl, Martin et al. Highly Resolved X-Ray Imaging Enabled by In(I) Doped Perovskite-Like Cs3Cu2I5 Single Crystal Scintillator [J]. | ADVANCED OPTICAL MATERIALS , 2022 , 10 (11) . |
| MLA | Wang, Qian et al. "Highly Resolved X-Ray Imaging Enabled by In(I) Doped Perovskite-Like Cs3Cu2I5 Single Crystal Scintillator" . | ADVANCED OPTICAL MATERIALS 10 . 11 (2022) . |
| APA | Wang, Qian , Zhou, Quan , Nikl, Martin , Xiao, Jiawen , Kucerkova, Romana , Beitlerova, Alena et al. Highly Resolved X-Ray Imaging Enabled by In(I) Doped Perovskite-Like Cs3Cu2I5 Single Crystal Scintillator . | ADVANCED OPTICAL MATERIALS , 2022 , 10 (11) . |
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摘要 ：
本发明提供一种Mn掺杂Cs2CdCl4闪烁体。所述Mn掺杂Cs2CdCl4闪烁体以Cs2CO3、CdCl2、MnCl2为原料经溶液法搅拌后再加热制得。本发明方法制备的Mn掺杂Cs2CdCl4(Cs2CdCl4：Mn)的纯度高，且工艺简单、制备成本低、适于大批量制备生产。
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| GB/T 7714 | 严铮洸 , 王超 , 肖家文 et al. Mn掺杂Cs2CdCl4闪烁体 : CN202211714911.1[P]. | 2022-12-29 . |
| MLA | 严铮洸 et al. "Mn掺杂Cs2CdCl4闪烁体" : CN202211714911.1. | 2022-12-29 . |
| APA | 严铮洸 , 王超 , 肖家文 , 韩晓东 , 王颖 . Mn掺杂Cs2CdCl4闪烁体 : CN202211714911.1. | 2022-12-29 . |
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摘要 ：
<正>近年来以卤化铅钙钛矿为代表的金属卤化物由于其优异的光电性质、光电器件性能备受研究者们的关注~1。金属卤化物除了在光伏、发光与显示、光电探测、激光等领域的应用前景突出,在高能射线探测与成像领域也逐渐引起人们的关注~(2-3)。本研究探讨了一类非铅铜(Ⅰ)基卤化物的合成及其闪烁体应用潜力。研究发现所合成的铜(Ⅰ)基卤化物具有高发光量子产率(>90%)、大的stokes位移等优点,其在X射线激发下产生明亮的可见光发射,
关键词 ：
卤化物 卤化物 闪烁体 闪烁体 射线成像 射线成像
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| GB/T 7714 | 肖家文 . 铜基卤化物闪烁体的合成及其X射线成像研究 [C] //第二届全国光电材料与器件学术研讨会摘要集 . 2021 . |
| MLA | 肖家文 . "铜基卤化物闪烁体的合成及其X射线成像研究" 第二届全国光电材料与器件学术研讨会摘要集 . (2021) . |
| APA | 肖家文 . 铜基卤化物闪烁体的合成及其X射线成像研究 第二届全国光电材料与器件学术研讨会摘要集 . (2021) . |
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摘要 ：
Progress towards high performance X-ray detection and dynamic imaging applications, including nondestructive inspection, homeland security, and medical diagnostics, requires scintillators with a high light yield, a reasonable decay time, low cost, and eco-friendliness. Recently, copper halide scintillators have drawn tremendous attention due to their outstanding radioluminescence performance. Here, we first employed beta-Cs3Cu2Cl5 as a high-performance scintillator, with a photoluminescence quantum yield (PLQY) of 94.6%, a radioluminescence light yield of 34 000 +/- 4000 photons per MeV, a low detection limit of 81.7 nGy(air) s(-1), and good operational stability under a total X-ray dose of 174.6 Gy(air) in air. In addition, this scintillator presents a high spatial resolution of 9.6 lp mm(-1) at the modulation transfer function of 0.2 and a superb performance at 60 frames per second in our X-ray imaging system. Overall, this highly efficient scintillator demonstrates outstanding comprehensive performance and shows great potential for broad applications in X-ray detection and dynamic imaging.
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| GB/T 7714 | Zhou, Quan , Ren, Jiwei , Xiao, Jiawen et al. Highly efficient copper halide scintillators for high-performance and dynamic X-ray imaging [J]. | NANOSCALE , 2021 , 13 (47) : 19864-19902 . |
| MLA | Zhou, Quan et al. "Highly efficient copper halide scintillators for high-performance and dynamic X-ray imaging" . | NANOSCALE 13 . 47 (2021) : 19864-19902 . |
| APA | Zhou, Quan , Ren, Jiwei , Xiao, Jiawen , Lei, Lin , Liao, Feiyi , Di, Haipeng et al. Highly efficient copper halide scintillators for high-performance and dynamic X-ray imaging . | NANOSCALE , 2021 , 13 (47) , 19864-19902 . |
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摘要 ：
本发明提供一种铜基卤化物的制备方法及其应用。以化学计量比的CsCl、CsI、CuCl为原料经机械研磨或球磨工艺制得，其中，所述机械研磨的参数：研磨速度为1～3r/s，研磨时间为5～120分钟；所述球磨工艺参数：球料比为(10～20)：1，研磨时间为5～70分钟，研磨介质为直径5～15mm的氧化锆研磨球。本发明方法制备的Cs5Cu3Cl6I2物相纯度高、结晶性好、发光性能优异，且该方法具有工艺简单、可操作性强，生产成本低的优势。
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| GB/T 7714 | 肖家文 , 牛晓伟 , 韩晓东 et al. 一种铜基卤化物的制备方法及其应用 : CN202110567609.7[P]. | 2021-05-24 . |
| MLA | 肖家文 et al. "一种铜基卤化物的制备方法及其应用" : CN202110567609.7. | 2021-05-24 . |
| APA | 肖家文 , 牛晓伟 , 韩晓东 , 严铮洸 , 周权 . 一种铜基卤化物的制备方法及其应用 : CN202110567609.7. | 2021-05-24 . |
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摘要 ：
本发明公开了一种β相Cs3Cu2Cl5快速闪烁体的制备方法及X射线探测应用，其合成步骤为，将油酸铯热注射到一定温度的氯化亚铜特定溶液中，搅拌氮气氛围反应，然后提纯后处理得到β相Cs3Cu2Cl5晶体，XRD结果表明物相与目标产物一致。将β‑Cs3Cu2Cl5溶到甲苯溶液中，然后采用滴涂方法能得到面积较大厚度可调的膜，这些β‑Cs3Cu2Cl5膜具有无铅环境友好型，较大的斯托克斯位移和弱的自吸收的特点，同时具有很高的发光效率和极短的瞬态寿命等优异的光学特性；另外其在X射线照射下具有明亮的荧光和较高的光产额，将其应用于X射线成像也能得到高空间分辨率的成像结果，这些结果表明该方法制备的β‑Cs3Cu2Cl5可作为一种高性能的快速闪烁体。
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| GB/T 7714 | 韩晓东 , 周权 , 肖家文 et al. 一种β相Cs3Cu2Cl5快速闪烁体的制备方法及X射线探测应用 : CN202011347644.X[P]. | 2020-11-26 . |
| MLA | 韩晓东 et al. "一种β相Cs3Cu2Cl5快速闪烁体的制备方法及X射线探测应用" : CN202011347644.X. | 2020-11-26 . |
| APA | 韩晓东 , 周权 , 肖家文 , 任吉威 , 赵一英 . 一种β相Cs3Cu2Cl5快速闪烁体的制备方法及X射线探测应用 : CN202011347644.X. | 2020-11-26 . |
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