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学者姓名：肖家文
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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
引用：
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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) . |
| 导入链接 | NoteExpress RIS BibTex |
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 . |
| MLA | Zhou, Quan et al. "Highly efficient copper halide scintillators for high-performance and dynamic X-ray imaging" . | NANOSCALE (2021) . |
| 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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The low-dimensional halide perovskites have received enormous attention due to their unique photovoltaic and optoelectronic performances. Periodic spacers are used to inhibit the growth of 3D perovskite and fabricate a 2D counterpart with layered structure, mostly based on organic/inorganic cations. Herein, by introducing organic anions (e.g., pentanedioic acid (PDA) and hexanedioic acid (HDA) simultaneously), leaf-shaped (Cs3Pb2Br5)(2)(PDA-HDA) microplates with low-dimensional structure are synthesized. They also exhibit significant photoluminescence (PL) centered at 540 nm with a narrow emission peak. The synthesis of single crystals of Pb(PDA) and Pb(HDA) allows to further clarify the crystal structure of (Cs3Pb2Br5)(2)(PDA-HDA) perovskite and its structural evolution mechanism. Moreover, the cooperative introduction of dicarboxylic acid pairs with appropriate lengths is thermodynamically favored for the low-dimensional perovskite crystallization. The temperature-dependent PL indicates a V-shaped Stokes shift with elevated temperature that could be associated with the localization of excitons in the inorganic layers between organic dicarboxylic acid molecules. This work demonstrates low-dimensional halide perovskite with anionic spacers, which also opens up a new approach to the growth of low-dimensional organic-inorganic hybrid perovskite crystals.
关键词 ：
halide perovskites halide perovskites low-dimensional materials low-dimensional materials nanocrystals nanocrystals photoluminescence photoluminescence
引用：
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| GB/T 7714 | Zhao, Yizhou , Zhang, Siyu , Lu, Yue et al. A Strategy toward New Low-Dimensional Hybrid Halide Perovskites with Anionic Spacers [J]. | SMALL , 2019 , 15 (6) . |
| MLA | Zhao, Yizhou et al. "A Strategy toward New Low-Dimensional Hybrid Halide Perovskites with Anionic Spacers" . | SMALL 15 . 6 (2019) . |
| APA | Zhao, Yizhou , Zhang, Siyu , Lu, Yue , Lan, Shangui , Zhu, Cheng , Xiao, Jiawen et al. A Strategy toward New Low-Dimensional Hybrid Halide Perovskites with Anionic Spacers . | SMALL , 2019 , 15 (6) . |
| 导入链接 | NoteExpress RIS BibTex |
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