Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202059
·
IF 10.05
Zhicheng Wang,Jiale Guo,Qi-Sheng Lin,Guanghui Rao,Jingtai Zhao,Chengzhang Yang,Weixiang He,Chujie Wang,Zhijun Zhang
Copper-based metal halide scintillators have received increasing attention due to their high light yield and nontoxicity. However, the synthetic methods are still not feasible for actual commercialization for the difficulty in scaling up and the absence of green chemical footprint. Herein, we report a new, simple, aqueous synthetic method for the mass production of highly purified and crystallized Cs 3 Cu 2 Cl 5 powder by a room-temperature reaction between a saturated aqueous solution of CsCl and a saturated hydrochloric acid solution of CuCl. The product exhibits a photoluminence peak centering at 527 nm (FWHM = 106.7 nm) and a quantum yield (PLQY) of 97%. A prototype X-ray imaging detector is fabricated by coupling a large area scintillation screen prepared by blade coating of Cs 3 Cu 2 Cl 5 powder and a commercial thin-film transistor (TFT) panel (16 cm × 13 cm, 125 µm pixel size) with readout circuit. The device exhibits a high spatial resolution of 4 lp mm −1 , exceeding the theoretical limit of the TFT panel, and an excellent dynamic imaging ability. In short, this work demonstrates an efficient novel synthetic method of Cs 3 Cu 2 Cl 5 and its application as X-ray imaging device, providing an applicable solution for its future commercialization.
研究领域:
材料科学
·
医学影像
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Yuxia Li,Qi Luo,Xin Huang,Hao Lu,Yazhou Yuan,Xieming Xu,Shuaihua Wang,Shaofan Wu
In recent years, the development of new scintillation materials with red and near-infrared light emission has had significant advantages based on the development of an avalanche photodiode with high quantum yield. This study used a hydrothermal method to synthesize rare-earth-doped Cs2NaScCl6 crystals, in which a red emission of Cs2NaScCl6:Sm was investigated with high X-ray sensitivity and low detection limit. In addition, a tunable wavelength range of radioluminescence can be achieved, in which a near-white light emission can be generated by precisely controlling the proportion of Sm3+ and Tb3+ doping concentrations. Meanwhile, a Cs2NaScCl6:7%Sm scintillation film has been successfully prepared by direct coating with a thickness of 150 μm, which achieves a spatial resolution of 11.9 lp mm−1 based on X-ray imaging experiments. Therefore, this perovskite material has shown potential application as an eco-friendly multifunctional imaging material.
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
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
·
2024
·
IF 1.9
Wanting Gui,Lu Yao,Xunsheng Zhou,Qi Wu,Chao Li,Shi Zhang,Yunfeng Zhan,Cai Lin Wang
Ag-based metal halide scintillators have recently attracted significant interest for X-ray imaging due to their high light yield and ultra-fast decay lifetime. These properties are advantageous for thermal neutron detection, yet their application in this area have not been thoroughly explored. In this article, we investigate the properties of Cu-doped Cs
2
AgI
3
metal halide scintillators for X-ray imaging and thermal neutron detection. A simple synthesis process was employed to produce Cu-doped Cs
2
AgI
3
scintillators. The as-prepared Cu-doped Cs
2
AgI
3
exhibited intense green emission with a photoluminescence quantum yield (PLQY) of 55 ± 2.7%. Cu-doped Cs
2
AgI
3
/PVDF plastic scintillation screen has been prepared and achieved a resolution of 5 lp/mm under X-ray radiation. A composite consisting of
6
LiF, Cu-doped Cs
2
AgI
3
, and Poly (methyl methacrylate) (PMMA) was utilized for thermal neutron detection, achieving a light yield of about 12,526±9 photons/thermal neutron, which is almost twice that of a commercial
6
Li-glass (GS20) scintillator (7000 photons/thermal neutron). Effective neutron-gamma pulse discrimination was achieved using a network dynamics digital filter, effectively separating thermal neutron events from gamma events.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhi-Zhong Zhang,Jun-Hua Wei,Jian-Bin Luo,Xu-Dong Wang,Zi-Lin He,Dai-Bin Kuang
Current X-ray imaging scintillators are dominated by inorganic scintillators grown through a high-temperature process. Exploring new types of scintillators with mild growth conditions, high light yields, and eco-friendly chemical compositions is essential and challenging. Herein, the zero-dimensional large-area laminar organic–inorganic hybrid metal halide TEA2MnI4 (TEA = tetraethylammonium) single crystal with dimensions of 50 mm × 60 mm × 0.82 mm is grown via a local-heating solvent evaporation method. Compared with its Cl- and Br-based counterparts, the incorporation of the iodine component enhances the X-ray attenuation ability and significantly accelerates the decay of the photoluminescence of TEA2MnI4. Interestingly, the prepared TEA2MnI4 exhibits a high transmittance of >90% over the range of 515–765 nm and exhibits a high light yield of 26288 photons/MeV, which provides the prerequisite for high-resolution X-ray imaging. The TEA2MnI4 single-crystal scintillator displays an astonishing spatial resolution exceeding 25 line pairs per millimeter, which provides a design concept for a Mn–I-based single crystal for high-performance scintillator applications.
研究领域:
材料科学
·
医学影像学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Hao Lu,Xieming Xu,Yuxia Li,Guiqing Feng,Jinhai Yang,Xixi Huang,Qi Luo,Shuaihua Wang,Shaofan Wu
Scintillators with high light yield, spatial resolution, and detection sensitivity are desirable for X-ray imaging. Howerer, it remains challenging to improve the light yield and radiation detection capability of alkali metal rare-earth fluoride (ALnF 4 ). Herein, a type of Cu 2+ ion heterovalent co-doped LiLuF 4 :Tb,Cu microcrystalline scintillation material with high light yield, persistent, and thermostimulated luminescence is obtained by defect engineering. The heterovalent codoping strategy not only increases the radioluminescence (RL) intensity, but also introduces more carrier traps in the material to enhance the long-afterglow and thermoluminescence intensity of LiLuF 4 :Tb microcrystals. After doping of 3 mol% Cu 2+ ions, the RL efficiency is increased by 88.61%, and the X-ray detection limit of LiLuF 4 :Tb,Cu reaches 2.7928 nGy·s ‒1 . This detectivity is considerably lower than the medical imaging requirements (5.5 µGy·s ‒1 ). Furthermore, a large-area flexible scintillation film of dimensions 30 × 30 cm 2 is prepared to achieve high spatial resolution X-ray imaging of 22 LP mm −1 @MTF(modulation transfer function) = 0.2. Besides, this flexible film enables X-ray imaging of curved objects and stores optical information for >48 h. This work provides a paradigm for improving the RL intensity and X-ray detection sensitivity of alkali rare-earth fluorides by crystal defect engineering, and enriches X-ray high resolution extended imaging applications.
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
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Chengxu Lin,Chenyu Li,Rui Liu,Xuning Zhang,Xingyue Liu,Bo Sun,Tielin Shi,Zhiyong Liu,Guanglan Liao
The perovskite scintillators have been extensively studied recently for their merits of tunable emission spectra and simple preparation processes. However, the practical applications of perovskite scintillator-based X-ray image sensor are still impeded by inadequate radioluminescence, poor environmental stability, and low imaging resolution. Herein, we demonstrate a scalable co-firing method to fabricate high-quality lead-free Cs 3 Cu 2 I 5 perovskite scintillator and an Indium (In)-doping strategy is introduced to enhance its radioluminescence performance at the same time. The In-doped Cs 3 Cu 2 I 5 obtains a high PLQY of 77.9% and a relative light output of 53372 ph/MeV, which are 0.34 and 1.08 times higher than those of the undoped counterpart, respectively. The X-ray detection limit of the In:Cs 3 Cu 2 I 5 can reach 150.55 nGy air /s, 36.53 times lower than the requirement for X-ray medical diagnosis. The synthesized scintillator also shows superior stability under continuous high dose X-ray irradiation of 6800 μGy air /s for 120 minutes, maintaining 95% of its initial radioluminescence intensity. Furthermore, a large-area (300 cm 2 ) flexible perovskite scintillator film is prepared, which owns a much competitive resolution of 10 lp/mm and less distortion in X-ray imaging. This work provides a practical path for the wide application of perovskite scintillator in the field of X-ray detection and imaging in near future.
研究领域:
材料科学
·
医学影像
·
放射学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2025
·
IF 5.5
Yanqing Zu,Tong Zhang,Binglin Zeng,Decui Gong,Chengzhang Yang,Chujie Wang,Run Gan,Lixia Jing,Peitao Liu,Xiaodong Li,Lei Zhao,Ailing Feng,Zhaoxin Wu
Perovskite nanocrystals (NCs) have attracted much attention in the fields of laser, color conversion and X-ray imaging. However, the poor photophysical properties and stability of NCs due to the proton exchange of traditional X-type ligands such as the pair of oleic acid and oleylamine as well as their easy detachment after purification or long-time storage, have become the major bottleneck for practical applications. Herein, we exploit an in-situ passivation strategy for CsPbBr 3 NCs by merely using a L-type bidentate ligand, namely 1,3-bis(3-aminopropyl) tetramethyldisiloxane (BAPTRDS). Theoretical calculations indicate that this double bridging of BAPTRDS on the surface of NCs can achieve a much larger binding energy (−1.86 eV) in comparision to single chelated 3-aminopropyl-triethoxysilane (APTES) (−1.05 eV). The BAPTRDS passivated NCs exhibit a high photoluminescence quantum yield of 71 %. Besides, the X-ray imaging detector and white light-emitting diodes (WLEDs) were separately obtained by BAPTRDS capped NCs, both of which possess the impressive performance. This work not only can provide deep understanding for surface chemistry of perovskite NCs, but also acquire high-quality CsPbBr 3 NCs for dual applications in X-ray imaging and display.
研究领域:
材料科学
·
光学工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 19
·2000814
·
IF 8.286
Yucheng Liu,Yunxia Zhang,Zhou Yang,Jian Cui,Haodi Wu,Xiaodong Ren,Kui Zhao,Jiangshan Feng,Jiang Tang,Zhuo Xu,Shengzhong (Frank) Liu
Lead-based (Pb) perovskite recently emerged as a promising photoelectric material for direct ionization radiation detection with outstanding performance. Unfortunately, its application is limited due to its toxicity caused by high Pb content, serious ion migration, poor crystallite quality, unsatisfactory reproducibility, high resistivity, and large fluctuation of electronic properties. Herein, a better substitute of lead-free inch-sized (34.3 mm × 34.3 mm × 13.1 mm) high-quality halide (CH 3 NH 3 ) 3 Bi 2 I 9 single crystal (MA 3 Bi 2 I 9 SC) is presented with higher resistivity, lower ion migration, and better stability. The coplanar detector fabricated using the MA 3 Bi 2 I 9 SC shows low dark noise current and outstanding X-ray response including a high sensitivity of 872 μ C Gy −1 cm −2 , short response time of 266 μs, low detection limit of 31 nGy s −1 , good spatial resolution of 4.22 lp mm −1 , long-term working stability, and excellent uniformity. Thanks to these excellent properties, the coplanar MA 3 Bi 2 I 9 SC X-ray detector array shows high-resolution X-ray imaging. The present report may inspire development of next-generation high-energy radiation detection and imaging using lead-free perovskite single crystals.
研究领域:
材料科学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yi Zheng,Hui Xu,XieMing Xu,LiuWei Xu,ShuaiHua Wang,ShaoFan Wu
Scintillators play a vital role in high-energy physics, medical imaging, security inspection, etc. Here, we designed and prepared a highly efficient scintillator of Ce,Tb-codoped LiLuF 4 , which was synthesized by a hydrothermal method using low-cost raw materials. The microcrystalline scintillator exhibits the strong luminescence of rare earth ion, which has a characteristic green fluorescence emission with a quantum yield of 71.59%. This material has a strong X-ray response, superior light output (16,509 ph/MeV), excellent ray cut-off capability and absolute stability. Based on micron-level powdered compounds, we used direct coating to manufacture a scintillation film with a size of 5.5 cm × 8.0 cm for X-ray imaging testing. The imaging test shows that the highly stable scintillation film not only has a spatial resolution capability of more than 10.0 LP/mm but also has great potential to be prepared as a flexible scintillator, which exhibited excellent performance as an potential scintillation detection material.
研究领域:
材料科学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Weifang Bu,Yajing Yan,Ping Liu,Ting Wang,Shaoqing Wang,Yang Yue,Nannan Zhu,Xuanyu Zhu,Luyi Yang,Dedan Mou,Xue Yu
Lead-free halide perovskites have shown promising application for indirect X-ray detection as fascinating scintillator. The fabrication of pixelated scintillator films leveraging directional confinement allows high-resolution imaging, yet process complexity and the potential crystal structure damage pose challenges that compromises the corresponding scintillator performance. In this work, a facile in-situ strategy for growing scintillation perovskite of Cs 5 Cu 3 Cl 6 I 2 within anodic aluminum oxide (AAO) membrane is developed as scintillator Cs 5 Cu 3 Cl 6 I 2 @AAO film. The as-fabricated pixelated scintillator array with an enhanced light directional confinement for high-resolution X-ray imaging is demonstrated. The corresponding film achieves a spatial resolution of approximately 20 lp mm −1 and a detection limit of 0.152 Gy·s −1 . Moreover, the Cs 5 Cu 3 Cl 6 I 2 @AAO film performs excellent stability under long-term X-ray irradiation, making it a reliable option for cost-effective pixelated indirect X-ray imaging.
研究领域:
材料科学
·
医学影像
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Photonics Research
·
2024
·Vol. 12
·期 2
·369-376
·
IF 6.6
Rui Liu,Zhiyong Liu,Chengxu Lin,Guangda Niu,Xuning Zhang,Bo Sun,Tielin Shi,Guanglan Liao,Guanglan Liao
Scintillators are widely utilized in high-energy radiation detection in view of their high light yield and short fluorescence decay time. However, constrained by their current shortcomings, such as complex fabrication procedures, high temperature, and difficulty in the large scale, it is difficult to meet the increasing demand for cost-effective, flexible, and environment-friendly X-ray detection using traditional scintillators. Perovskite-related cesium copper halide scintillators have recently received multitudinous research due to their tunable emission wavelength, high photoluminescence quantum yield (PLQY), and excellent optical properties. Herein, we demonstrated a facile solution-synthesis route for indium-doped all-inorganic cesium copper iodide (Cs3Cu2I5) powders and a high scintillation yield flexible film utilizing indium-doped Cs3Cu2I5 powders. The large area flexible films achieved a PLQY as high as 90.2% by appropriately adjusting the indium doping concentration, much higher than the undoped one (73.9%). Moreover, benefiting from low self-absorption and high PLQY, the Cs3Cu2I5:In films exhibited ultralow detection limit of 56.2 nGy/s, high spatial resolution up to 11.3 lp/mm, and marvelous relative light output with strong stability, facilitating that Cs3Cu2I5:In films are excellent candidates for X-ray medical radiography. Our work provides an effective strategy for developing environment-friendly, low-cost, and efficient scintillator films, showing great potential in the application of high-performance X-ray imaging.
研究领域:
材料科学
·
医学影像
·
放射学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yong Li,Dedan Mu,Jing Yu,Zheng Wei,Man Zhang,Peng Zhang,Feng Zhang,Yinxi Liu,Pin Xiang,Zhaohong Li,Jianbei Qiu,Bitao Liu
Halide perovskites with excellent thermal stability will have better application prospects in the field of X-ray scintillation detectors. However, conventional scintillators exhibit low thermal stability, which limits their effectiveness in practical applications. In this study, we designed and developed a Cs 2 CuCl 4 scintillator with enhanced thermal stability. Through the preparation of Cs 2 CuCl 4 and the execution of heating and cooling cycle tests, we demonstrated that the Cs 2 CuCl 4 scintillator possesses high thermal stability. This stability is attributed to the high valence stability of the divalent copper ions, which are positioned in stable tetrahedral centers, thereby enhancing their structural integrity. The scintillator achieves a high steady-state light yield of 42,260 photons MeV −1 and exhibits the highest spatial resolution for powder-based scintillation screens at 20 lp mm −1 after undergoing cyclic treatment within the temperature range of 323 K to 673 K. Furthermore, the scintillator is capable of visualizing the melting of alloys, indicating its significant potential for application in high-temperature environments. This study offers a novel perspective on the design of scintillators with high thermal stability.
研究领域:
材料科学
·
物理学
·
医学影像
✓ 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）