ACS Applied Electronic Materials
·
2020
·
IF 0
Qiang Xu,Xiang Wang,Hang Zhang,Wenyi Shao,Jing Nie,Yong Guo,Juan Wang,Xiaoping Ouyang
A high Z CsPbBr3 halide perovskite with large charge carrier diffusion length was used for radiation detection applications. The high sensitivity X-ray detector is expected to be used for imaging applications. The free-seeding CsPbBr3 single crystals (SCs) were directly grown on ITO glass. We fabricated the Ag/CsPbBr3/ITO sandwich structural X-ray detector with Schottky contact at room temperature. We investigated the X-ray detection and phase-contrast X-ray imaging of the all-inorganic halide perovskite CsPbBr3 SCs. The devices exhibit high performances with low dark current density (∼5–27 nA/cm2) and high sensitivity (770 μC·Gy–1·cm–2) with an applied voltage of 8 V. An “L”-shape imaging was obtained based on the CsPbBr3 SC X-ray detector array, which makes it a promising application for pixel X-ray imaging techniques.
研究领域:
材料科学
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辐射探测
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成像技术
·
半导体物理
✓ 已验证
产品关联
DOI
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Kuo Shen,Ruiting Zhang,Yahong Jin,Yanmei Li,Yihua Hu
X-ray storage phosphors are found wide-ranging applications in medical diagnosis, nondestructive testing and X-ray imaging. However, designing X-ray storage phosphors with high electron storage capacity still poses a daunting challenge. In this study, we designed a fluorescent powder based on Eu 2+ -doped BaSiO 3 , demonstrating excellent optical information storage characteristic. Under high-energy X-ray filling, shallow traps exhibit low electron capacity and only produce weak afterglow, which greatly helps to minimize the impact of afterglow on the image quality during X-ray imaging. In addition, the deep traps at 1.01 eV filled with high-energy X-ray allow the material to store information for a long time. The crystal structure, photoluminescence (PL) and thermoluminescence (TL) spectra were studied systematically. The electron trapping properties of the material were analyzed using TL spectroscopy. Finally, we fabricated a flexible film with phosphors, the flexible film has been utilized to demonstrate high-quality real-time X-ray imaging and achieve time-delayed X-ray imaging of curved objects, such as flexible circuit boards.
研究领域:
材料科学
·
医学成像
·
放射学
✓ 已验证
DOI
高影响因子
Light-Science & Applications
·
2020
·Vol. 9
·期 1
·1-10
·
IF 13.714
Zhu Wenjuan,Ma Wenbo,Su Yirong,Chen Zeng,Chen Xinya,Ma Yaoguang,Bai Lizhong,Xiao Wenge,Liu Tianyu,Zhu Haiming,Liu Xiaofeng,Liu Huafeng,Liu Xu,Yang Yang (Michael)
X-rays are widely used in probing inside information nondestructively, enabling broad applications in the medical radiography and electronic industries. X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention recently. However, the strong self-absorption, relatively low light yield and lead toxicity of these perovskites restrict their practical applications. Here, we report a series of nontoxic double-perovskite scintillators of Cs 2 Ag 0.6 Na 0.4 In 1-y Bi y Cl 6 . By controlling the content of the heavy atom Bi 3+ , the X-ray absorption coefficient, radiative emission efficiency, light yield and light decay were manipulated to maximise the scintillator performance. A light yield of up to 39,000 ± 7000 photons/MeV for Cs 2 Ag 0.6 Na 0.4 In 0.85 Bi 0.15 Cl 6 was obtained, which is much higher than that for the previously reported lead halide perovskite colloidal CsPbBr 3 (21,000 photons/MeV). The large Stokes shift between the radioluminescence (RL) and absorption spectra benefiting from self-trapped excitons (STEs) led to a negligible self-absorption effect. Given the high light output and fast light decay of this scintillator, static X-ray imaging was attained under an extremely low dose of ∼ 1 μGy air , and dynamic X-ray imaging of finger bending without a ghosting effect was demonstrated under a low-dose rate of 47.2 μGy air s −1 . After thermal treatment at 85 °C for 50 h followed by X-ray irradiation for 50 h in ambient air, the scintillator performance in terms of the RL intensity and X-ray image quality remained almost unchanged. Our results shed light on exploring highly competitive scintillators beyond the scope of lead halide perovskites, not only for avoiding toxicity but also for better performance.
研究领域:
材料科学
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放射学
·
成像技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Lili Han,Jihao Zhao,Yifan Miao,Wenqian Zhou,Minglang Yuan,Jinghao Cui,Zhipeng Ci
Copper-based halides have emerged as promising scintillator materials for X-ray imaging, attributed to their favorable photophysical characteristics, such as negligible self-absorption, high light output, and fast decay. Within this category of materials, Cs 3 Cu 2 Cl 5 composite polymer scintillator films stand out, delivering excellent performance as flexible X-ray detector screens. However, severe scattering and light degradation induced by the inevitable agglomeration during recombination restricted the application in high-resolution and flexible X-ray imaging. In this study, a Cs 3 Cu 2 Cl 5 @PMMA film prepared by in-situ growth strategy is successfully developed, which represents uniform area, adjustable flexibility and excellent scintillation performance. The prepared large-area film exhibits green emission at 527 nm, with a high light yield, low detection limit and excellent spatial resolution. Meanwhile, the Cs 3 Cu 2 Cl 5 @PMMA film exhibits a remarkable degree of flexibility, enabling imaging applications on non-planar surfaces. Furthermore, it also demonstrates excellent resistance to high temperature environment, maintaining its high-quality imaging performance at 403 K.
研究领域:
材料科学
·
光学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Chang Gu,Tao Wang,Xian Qin,Xiaogang Liu
Scintillators are essential in applications, such as homeland security, nuclear physics, and geological exploration. However, conventional scintillators often suffer from degradation under polar chemical conditions, resulting in scintillation quenching and structural decomposition. Here, a molecular engineering strategy is demonstrated to enhance scintillator stability and performance through halogen-bonded lattice reconstruction. The synthesis of a copper cluster scintillator, (X-MBA) 4 Cu 4 I 4 (X: Br or Cl, MBA: S -methylbenzylamine) is reported, where halogen bonding improves lattice symmetry and rigidity, effectively suppressing electron-phonon coupling and defect trapping. The halogenated copper clusters exhibit a photoluminescence quantum yield of ≈90%, a 13-fold increase in light yield, and an X-ray detection limit of 28.8 nGy air s −1 , outperforming halogen-free counterparts. These scintillators maintain their structural integrity and performance even after prolonged exposure to polar chemical solvents. The combination of molecular design and structural robustness enables high-resolution X-ray imaging (22 lp mm −1 ) across various chemical environments, paving the way for high-performance scintillators with exceptional durability and efficiency.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Yinkun Liao,Yibo Hu,Yuanhao Zhou,Jingkun Chen,Xue Yang,Meng Gu,Kuan Ren,Jingtai Zhao,Qianli Li,He Feng
Copper halide scintillation materials with self-trapped exciton (STE) photoluminescence have attracted great interest in the field of optoelectronics. However, it is challenging for Cs3Cu2Br5 materials to achieve wider spectral emission and high spatial resolution X-ray imaging in applications. Herein, combining XRD and energy dispersive spectroscopy results, it is proved that Ag+ is doped into the Cs3Cu2Br5 lattice through an ion doping process, and PL is regulated from 460 nm to 543 nm. By density functional theory calculation, the band gap is reduced from 2.25 eV of Cs3Cu2Br5 to 1.99 eV of Cs3Cu2Br5:Ag, which is also consistent with the spectral redshift. The gradient study of the silver ion concentration from 5% to 35% shows that the best silver ion concentration is 25%. The experimental results show that the doped silver ions can improve the PL, PLE, PLQY, XEL and other properties of the material, such as the PLQY which increased from 27.38% to 90.62%. At the same time, Cs3Cu2Br5:Ag also has good stability, it can be stored in air for 30 days, and its PL intensity remains at 90.73%. The X-ray space of the Cs3Cu2Br5:Ag-UV scintillation film measured in a laboratory imaging system can reach 18.3 lp mm−1.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Mengyao Wang,Xiaofei Qing,Tianyun Du,Chuanli Wu,Xiuxun Han
The rising demand of X-ray imaging technologies in medical radiography and nondestructive detection calls for novel scintillator materials particularly with effective cost, high resolution, and low detection limit. Here we reported the investigations on the scintillating behavior of vacancy-ordered double perovskite Cs2SnCl6 fabricated via a simple co-precipitation process. By introducing Te4+ doping, an intense yellow emission was achieved upon X-ray radiation. Combined with PDMS, flexible imaging screens with tunable size and thickness could be obtained, and demonstrated a high resolution of 20 LP mm-1, low detection limit of 132 nGyair/s, and high X-ray radiation endurance. Its excellent flexibility enables clear and less vignetting X-ray imaging for nonplanar subjects. The findings open a new avenue towards versatile applications for Sn-based vacancy-ordered double perovskites other than visible and near-infrared emissions.
研究领域:
材料科学
·
医学影像学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Photonics Research
·
2022
·Vol. 3
·期 12
·2200197
·
IF 0
Heng Guo,Qingxian Zhao,Peng Ran,Jinping Chen,Yizhi Zhu,Qingsong Jiang,Yuling Tang,Zhenhua Zhang,Lei Song,Chunxiang Xu,Shouhua Luo,Zengliang Shi
Scintillator is a critical component to detect high-energy particles or rays, which is widely used in deep space exploration, security inspection, and nondestructive testing and medical diagnosis, such as X-ray imaging and computed tomography (CT). However, the wider application of traditional inorganic and organic scintillators is limited by the complex operation process or poor adaptability to changeable environment, and there remains a demand to develop green and stable scintillators with high sensitivity and low detection limit. Herein, the one-step preparation of lead-free perovskite Cs 3 Cu 2 I 5 scintillator film for high-definition X-ray imaging by conventional chemical vapor deposition method is reported. Cs 3 Cu 2 I 5 demonstrates good stability and bright-blue emission at 445 nm and superhigh photoluminescence quantum yield (85.14%). Importantly, upon X-ray irradiation, the Cs 3 Cu 2 I 5 perovskite film exhibits light yield (≈39 251 photons MeV −1 ) as high as two times of the commercially available Ce:LuAG single-crystal scintillator (≈22 000 photons MeV −1 ). Furthermore, the practical demonstration for a bamboo stick and insect specimens illustrates sensitive scintillation response to X-ray signals with superior linearity and high-quality images in X-ray photography and CT. Overall, Cs 3 Cu 2 I 5 film provides nontoxicity, high radioluminescence intensity, and good stability, it can be regarded as a competitive material for X-ray imaging.
研究领域:
材料科学
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医学影像
·
辐射探测
✓ 已验证
DOI
Nuclear Science and Techniques
·
2022
·Vol. 33
·期 8
·1-11
·
IF 2.389
Lü Zhi-Wei,Wei Gong-Xiang,Wang Han-Qiu,Guan Yu,Jiang Ning,Liu Yun-Yan,Li Zhao,Qin Hua,Liu Hui-Qiang
The evolution of lead halide perovskites used for X-ray imaging scintillators has been facilitated by the development of solution-processable semiconductors characterized by large-area, flexible, fast photoresponse. The stability and durability of these new perovskites are insufficient to achieve extended computed tomography scanning times with hard X-rays. In this study, we fabricated a self-assembled CsPbBr 3 -based scintillator film with a flexible large-area uniform thickness using a new room-temperature solution-processable method. The sensitivity and responsivity of X-ray photon conversion were quantitatively measured and showed a good linear response relationship suitable for X-ray imaging. We also demonstrated, for the first time, that the self-assembled CsPbBr 3 -based scintillator has good stability for hard X-ray microtomography. Therefore, such an inexpensive solution-processed semiconductor easily prepared at room temperature can be used as a hard X-ray scintillator and equipped with flexible CsPbBr 3 -based X-ray detectors. It has great potential in three-dimensional high-resolution phase-contrast X-ray-imaging applications in biomedicine and material science because of its heavy Pb and Br atoms.
研究领域:
材料科学
·
医学影像
·
半导体技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 9
·2402845
·
IF 7.2
Xiu-Xian Guo,Zi-Lin He,Jing-Hua Chen,Jian-Bin Luo,Jun-Hua Wei,Qing-Peng Peng,Dai-Bin Kuang
The ever-increasing counterfeiting issues have triggered a research upsurge in multi-modal fluorescence anti-counterfeiting materials. All inorganic metal halide double perovskites possess the advantages of facile preparation procedures and high thermal stability, which also provide suitable doping sites to regulate the emission behavior and highlight the potential for serving as multi-modal fluorescence anti-counterfeiting materials. Herein, a series of Sb 3+ , Er 3+ , and Yb 3+ solely or codoped Cs 2 NaLuCl 6 are successfully prepared, and the optical properties are dependent on the doping ratio of Sb 3+ and lanthanide ions (Ln 3+ ). Notably, due to the participation of energy-transfer and cross-relaxation processes, the tri-doped Cs 2 NaLuCl 6 (0.3%Sb 3+ -20%Er 3+ -50%Yb 3+ -Cs 2 NaLuCl 6 ) shows luminescence responses to the excitation sources with different photon energies, which is employed to construct anti-counterfeiting fluorescence patterns by combining the Sb 3+ , Er 3+ , and Yb 3+ solely or codoped Cs 2 NaLuCl 6 . Besides the multi-modal luminescence behavior, NIR emission from Er 3+ and Yb 3+ can be used in the night-vision device. Remarkably, the 20%Er 3+ -doped Cs 2 NaLuCl 6 shows an excellent light yield of 30767 photons MeV −1 and low limit of detection (LoD) of 108 nGy s −1 , highlighting the potential in X-ray imaging. This work provides a rational route to design multi-functional materials that can be used in anti-counterfeiting, night vision, and X-ray imaging.
研究领域:
材料科学
·
光学
·
应用物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Junnan Wang,Zeyu Wang,Nikolai V. Gaponenko,Jindou Shi,Zheyuan Da,Chen Zhang,Yongqiang Ji,Qing Yao,Youlong Xu,Minqiang Wang
X-ray imaging technology has been integral to numerous aspects of people's lives since its inception. With the growing demand for advanced imaging technologies, lead-free metal halide perovskites have received significant attention due to their non-toxicity, stability, and excellent optical properties. This paper investigates the scintillation behaviour of a Te doped Cs2SnCl6 scintillator composite film (CF) prepared through an innovative in situ growth strategy. This approach achieves the direct growth of Cs2SnCl6:Te micro-crystals within polymethyl methacrylate (PMMA), mitigating the issues of optical property degradation and inhomogeneous distribution that are inevitable in a conventional two-step mixing method. By controllable optimization of the doping ratio of Te, the Cs2SnCl6:Te/PMMA CFs exhibited exceptional scintillation properties under X-ray irradiation, with the detection limit reaching up to 112 nGyairs−1. In X-ray imaging applications, the Cs2SnCl6:Te 15%/PMMA CF demonstrated advanced sensitivity, producing high-resolution structural images of the target object. This advancement highlights the promising potential of lead-free metal halide perovskites in the development and application of X-ray imaging technology.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi-Hua Yang,Gui-Hua Li,Yu-Chen Ao,Shu-Juan Zhao,Han-Qi Wei,Le Fu,Zhi-Wei Luo,Tian-Liang Zhou,Chu-Jie Wang,Ge-Mei Cai
As a new generation of environmentally friendly halide materials, Cs 3 Cu 2 I 5 shows up the promising application in scintillation, LED, and photoelectric detection fields. However, liquid phase methods cannot produce Cs 3 Cu 2 I 5 on a large scale, and the preparation process is accompanied by serious pollution. Although the ball milling method can solve the problems caused by the liquid phase synthesis method, the Cs 3 Cu 2 I 5 obtained has many surface defects and low luminescence efficiency. In this work, a strategy of doping-assisted ball-milling synthesis using ZnI 2 is proposed. Similar to the chemical preparation of Cs 3 Cu 2 I 5 , the iodine-rich environment during the modified ball milling process can also play a role in repairing surface defects. And it has been demonstrated through experiments and first principles calculations that the distortion of [Cu 2 I 5 ] 3- under ground/excited state can be adjusted through doping Zn into the Cu1 site, the formation barrier of self-trapped excitons is reduced, and the luminous efficiency of Cs 3 Cu 2 I 5 is significantly improved. Subsequently, using the simple hot-pressing method, the representative Cs 3 Cu 2 I 5 :1.0Zn sample was combined with commercially available polypropylene to fabricate Cs 3 Cu 2 I 5 :1.0Zn@PP film. Finally, the potential applications of the newly-developed film in portable and customizable WLED and scintillation fields were explored.
研究领域:
材料科学
·
光学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）