JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Zixu Zhang,Xueyuan Guo,Keke Huang,Xiaoqi Sun,Xiaoming Li,Haibo Zeng,Xuanbo Zhu,Ying Zhang,Renguo Xie
Scintillators have recently attracted increased attention because of their potential applications in various fields, such as medical imaging, security, and nondestructive inspection . However, the response time of commercial scintillators is normally in microseconds or milliseconds only, a property that restricts their practical applications in high-resolution and dynamic X-ray imaging. Here, we report Rb 2 AgCl 3 crystals as an efficient scintillator material with ultrafast response time. The Rb 2 AgCl 3 crystals were found to have a one-dimensional structure and a bright-orange emission peak at 580 nm and a quantum yield of 60.0%. Experimental and computational studies revealed that the strong emission might have originated from self-trapping excitons that resulted into large Stokes shifts and high quantum efficiency. Upon X-ray excitation, the Rb 2 AgCl 3 crystals displayed a fast scintillation decay time of 9.5 ns and achieved a light yield of 18,300 photons MeV −1 . The ratio of light yield to decay time could reach up to 1926 photons MeV −1 ns −1 , which was higher than that of existing commercial scintillators. As a scintillator, Rb 2 AgCl 3 crystals are a promising material with potential applications in dynamic real-time imaging with a high spatial resolution owing to its nontoxicity, good stability, high light yield, and short decay time.
研究领域:
材料科学
·
医学成像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 22
·10260-10270
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IF 4.682
Zhang Fa,Lin Zhengguo,Xie Lingling,Li Xitao,Lu Bingheng,Zhao Ziheng,Jiang Ting,Wang Min,Wu Yafeng,Zhou Quan,Xiao Jiawen,Chen Bingkun,Wang Yongtian
Abstract Copper-based lead-free perovskite derivatives have recently drawn great attention for their excellent optoelectronic properties and potential applications in light-emitting diodes (LEDs) and photodetectors. Herein, facile synthesis methods of cooling crystallization and wet ball milling (WBM) are adopted to synthesize K 2 CuCl 3 , resulting in single crystals (SCs) and powder samples, respectively. The as-fabricated K 2 CuCl 3 samples exhibit blue–violet emission, with the highest photoluminescence quantum yield (PL QY) of 70% (under 280 nm excitation), and the photoluminescence (PL) is attributed to the self-trap excitons (STEs) emission. We also test the scintillation properties of K 2 CuCl 3 for X-ray detection and imaging applications. A down-conversion LED is finally made by using K 2 CuCl 3 as phosphor. Graphical abstract
As-synthesized K2CuCl3 can be used for either photoluminescence under UV
light or X-ray imaging under X-ray radiation. -- Present in ms
研究领域:
材料科学
·
光学
·
放射学
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Richeng Lin,Ying Ding,Wei Zheng,Mingge Jin,Liang Chen,Xiaoping Ouyang,Feng Huang
Scintillators with color-tunable radioluminescence have attracted great attention due to the advantage of satisfying needs required by different radiation detection applications. However, while most traditional scintillators achieve efficient radioluminescence through exciton migration or activator-assisted recombination mechanism, the challenges relating to spectral modulation remain. Here, a composite scintillator consisting of a eco-friendly metal halide heterostructure demonstrates color-tunable radioluminescence with color temperature ranging from 2,505.6 K to 14,215.9 K. Under X-ray irradiation, the composite scintillator emits bright white light with a color rendering index of 92.6 set and a luminescent yield of 21,400 photons/MeV, which originates from self-assembled metal halide heterostructure and efficient energy transfer. The performance exhibited by the composite heterostructure material provides and proves a feasible strategy for realizing color-tunable scintillators in ionizing radiation detection.
研究领域:
材料科学
·
辐射检测
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
E.V. Zelenina,M.M. Sychov,D.A. Kolotinsky,S.N. Petrov,E.A. Vasilyeva
The percolation-like effect of sharp increase of radioluminescence intensity with the rise of wurtzite phase content in sphalerite-wurtzite mixed phase composition ZnS:Cu,Br phosphors has been observed. This result was analyzed using percolation theory, considering that formation of the composite sphalerite-wurtzite matrix promotes the expansion of the interphase border square and the activator coactivator (Cu + and Br − ) diffusion along this border forming the luminescence centers as donor-acceptor Cu ’ Zn -Br S ● . So, the curtain content of the wurtzite phase promotes the continuous diffusion pathways formation on the interphase border and improves luminescence centers forming ability. To quantify the wurtzite-sphalerite interface effect in the phosphor grain on the effective diffusion coefficients of activating impurity ions a model was developed for different ratios of the diffusion coefficients along the interphase boundary to the diffusion coefficients in the bulk of the single phase. Considering that increased diffusion results in formation of larger amount of luminescent centers and higher luminescence intensity, good agreement between model and experimental results is found.
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 THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Kang Qian,Yubai Pan,Zewang Hu,Xiaopu Chen,Yun Shi,Xin Liu,Haohong Chen,Martin Nikl,Jiang Li
SrHfO 3 :Ce and SrHfO 3 :Ce,Al powders were prepared by the solid-state synthesis using the commercial HfO 2 , SrCO 3 , CeO 2 and α-Al 2 O 3 as the starting materials. All the SrHfO 3 :Ce and SrHfO 3 :Ce,Al powders calcined at different temperatures within 1100 °C–1300 °C for 8 h in air exhibited a pure SrHfO 3 phase. Meanwhile, the effects of different calcination temperatures and co-doped alumina on the microstructure of SrHfO 3 :Ce,Al powders were discussed. SrHfO 3 :Ce and SrHfO 3 :Ce,Al ceramics were successfully fabricated via the vacuum sintering at 1800 °C for 20 h. The alumina acted as the sintering aid, which promoted the densification and eliminated the intragranular pores of SrHfO 3 :Ce,Al ceramics. The charge disbalance was effectively compensated by co-doped alumina. SrHfO 3 :Ce,Al ceramics exhibited a higher light yield of 5700 ph/MeV compared with 4600 ph/MeV obtained in SrHfO 3 :Ce ceramics. The charge traps in ceramics and their effects on scintillation properties were also investigated by thermoluminescence measurement.
研究领域:
材料科学
·
无机非金属材料
·
发光材料
·
陶瓷学
·
核医学成像
·
辐射探测
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Li Chen,Junting Chen,Chunyu Wang,MeiLing Chen,Fangyin Zhu,Zhengye Xiong,Jingyuan Guo
A dual-functional luminescent materials NaYSrWO 6 :xEu 3+ (x = 0.005,0.01,0.05,0.1,0.15,0.2,0.3,0.5) with a double perovskite structure was synthesized using a high temperature solid state reaction method. Systematic investigations of their photoluminescence, thermoluminescence and radiation luminescence properties were carried out. Under blue light excitation, Maximum PL intensity was achieved with Eu 3+ doping concentration of x = 0.15. Excited at 325 nm, the material exhibited characteristic red emission of Eu 3+ with quantum efficiency reaching 64.4 %, CIE color coordinates of (0.607, 0.358), color purity of 87.21 %, correlated color temperature of 1970 K, and activation energy of 0.214 eV. These parameters satisfy the critical requirements for phosphors in indoor LED lighting systems.The thermoluminescence curve of the sample shows two apparent peaks at approximately 407K and 460K temperatures.The material demonstrated superior thermoluminescence performance at doping concentrations (x = 0.3). TL response increased linearly with increase in dose rate within 0.266–2.1 Gy/min, indicating potential for real-time low-dose-rate radiation monitoring. After X-ray irradiation, it features fast saturation, stable luminescence, short afterglow, and excellent repeatability. This study confirms that the double perovskite tungstate NaYSrWO 6 :xEu 3+ simultaneously achieves efficient photoluminescence and radiation-responsive characteristics, demonstrating promising applications in white LED lighting, real-time dosimetry, and X-ray imaging technologies.
研究领域:
材料科学
·
光学材料
·
固态物理
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发光学
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Na Lin,Li Xiao,Yishi Wu,Yi-Fan Wu,Zi-Xian Li,Tian-Yu Yan,Zhi-Wei Chen,Cheng-Yang Yue,Dongpeng Yan,Xiao-Wu Lei
Excitation- and temperature-dependent multicolor luminescent materials are valuable in advanced optoelectronic devices while they haven't been realized in 2D metal halides owing to the restrictions of Kasha's rule. Herein, we reported a novel 2D lead-free halide of (AMP) 2 Cu 2 Br 4 (AMP = N-aminomorpholine) through structural engineering, in which the [Cu 2 Br 4 ] 2− layer is composed of corner- and edge-shared [CuBr 4 ] tetrahedron. The non-centrosymmetric structure enables (AMP) 2 Cu 2 Br 4 to exhibit an impressive second-harmonic generation signal of ≈0.8 times that of KH 2 PO 4 (KDP). Remarkably, (AMP) 2 Cu 2 Br 4 possesses two independent self-trapped exciton-emitting states under different excitation energies, which display multicolor luminescence outputs from blue, white, to orange with near-unity photoluminescence quantum yields (PLQYs). Additionally, the luminescence can be regulated in a wide temperature range of 300–400 K due to reversible energy transfer between two emitting bands, acting as a luminescence ratio thermometer with a ultrahigh relative thermal sensitivity of 56.755% K −1 . High PLQY and large Stokes shift further endow (AMP) 2 Cu 2 Br 4 strong radioluminescence with an ultrahigh light yield of 92,400 photons·MeV −1 , low detection limit of 121 n Gy air ·s −1 and a short afterglow of 0.41 m s. The abundant photophysical properties highlight the multiple optoelectronic applications of 2D cuprous halide in white light-emitting, laser technology, flexible temperature sensors, and X-ray imaging.
研究领域:
材料科学
·
光电子学
·
凝聚态物理
·
无机化学
·
功能材料
·
辐射探测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yongbao Xiao,Chong Wang
Zero-dimensional (0D) Mn2+-based Hybrids have attracted increasing attention as promising candidates for luminescent and scintillation materials due to their unique chemical compositions, crystal structures, and photophysical properties. However, the specific influence of hydrogen bonding, which serves as a key interaction between organic cations and the inorganic framework, has received limited investigation. In this study, two 0D Mn2+-based single crystals, [MePi]MnBr4 and [EtPi]MnBr4, were synthesized using a simple solvent to antisolvent recrystallization approach. Under 450 nm excitation, both compounds exhibit sharp green emissions attributed to the spin-forbidden d–d transitions of Mn2+. Differences in hydrogen bonding lead to distinct photoluminescence quantum yields (PLQY) and radioluminescence light yields (LY) between the two materials. Notably, [EtPi]MnBr4 shows a higher PLQY of 96%. When benchmarked against the commercial Lu3Al5O12:Ce3+ scintillator, [EtPi]MnBr4 achieves an estimated light yield of approximately 24110 photons MeV-1 and an X-ray detection limit of 44.66 μGy s-1. In addition, a flexible scintillation screen composed of [EtPi]MnBr4 embedded in PDMS was prepared, achieving a spatial resolution of 10 lp mm-1. These results highlight the potential of 0D Mn2+-based Hybrids as low-cost, eco-friendly, and solution-processable scintillators for multifunctional applications.
研究领域:
材料科学
·
无机化学
·
光学材料
·
辐射探测
·
晶体工程
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Chen Li,Jun'an Lai,Daofu Wu,Qiang Wang,Yanjun Bai,Peng He,Kang An,Xiaosheng Tang
Metal halide with high luminescence property have emerged as the novel candidate materials for X-ray detection and imaging. However, the toxicity of some metal cations , such as Pb 2+ , limits its further widespread application. In this work, a new of lead-free pyridine manganese halide (C 5 H 6 N) 2 MnBr 4 was synthesized by the solution-processed method in room temperature . The research results show (C 5 H 6 N) 2 MnBr 4 has a typical structure of tetrahedral coordination related to d-d transition, which has a strong green emission at 520 nm with a full width at half maximum (FWHM) of 45 nm. (C 5 H 6 N) 2 MnBr 4 exhibits high photoluminescence quantum yields (PLQYs) of 59.36%, appreciable light yield of 15400 photons/MeV which is much higher than lead halide, relative short PL decay lifetime (247 μs) which is shorter than previous reported manganese halide and ultrashort RL decay time (12.24 ns). Finally, the performance of (C 5 H 6 N) 2 MnBr 4 Scintillators was verified via X-ray imaging, and clear X-ray image was obtained. (C 5 H 6 N) 2 MnBr 4 scintillators are eco-friendly and easy-synthesize while it has many superior performances: large stokes shift to reduce self-absorption of light; high PLQY to enhance scintillation performances; short decay lifetime to improve response. Thus, (C 5 H 6 N) 2 MnBr 4 shows great potential as next generation of scintillators and this work provides a new way for the preparation of simple and low-cost metal halide scintillators.
研究领域:
材料科学
·
放射学
·
光学
✓ 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）