Advanced Optical Materials
·
2025
·
IF 7.2
Wenna Gao,Liangshen Wang,Yuqiang Wang,Wenqian Xu,Xiangyu Zhang,Dangli Gao
Precise manipulation of luminescence modality and chromatic output in persistent luminescence (PersL) materials is critical for information storage and advanced anti-counterfeiting. Here, a multimodal GdNbO 4 :Bi 3+ ,Tb 3+ phosphor with the quintuplet luminescence (including photoluminescence, PersL, photo-stimulated luminescence (PSL), photo-stimulated PersL, and thermo-stimulated luminescence (TSL)) and spatiotemporally tunable colorimetry is reported. The PersL mechanism follows the localized model is proposed based on monitored wavelength and temperature-dependent thermoluminescence curves. While the dynamic PersL output color can be attributed to energy transfer and different luminescent decay rates. For the first time, the mechanisms of PSL and TSL are clarified, which are attributed to the release of trapped carriers corresponding to optical and acoustic transitions, respectively. These multimodal phosphors are used for information storage and sophisticated anti-counterfeiting. This study here offers profound insights into the mechanism of multimodal luminescence, providing theoretical guidance and practical examples for the design, synthesis, and application of PersL materials.
研究领域:
材料科学
·
光电子学
·
信息存储
·
固体物理
·
化学
✓ 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
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发光材料
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陶瓷学
·
核医学成像
·
辐射探测
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 11
·1-8
·
IF 1.784
Zhou Xinquan,Ju Guifang,Dai Tiansong,Li Yang,Wu Haoyi,Hu Yihua
Long-persistent phosphor and up-conversion particles used for optical imaging continue to interest researchers. The present work identifies an Er 3+ doped micro-sized CSAO-CSO mixed material that exhibits both up-conversion and persistent luminescence. The cross-relaxation that occurs among Er 3+ ions contributes to enhancing the up-conversion intensity. The Tm 3+ /Ho 3+ co-doped strategy was used to induce tunable up-conversion colors. The cross-relaxation process corresponding to the energy transfer mechanism was investigated via the luminescence lifetimes of Er 3+ . Moreover, the persistent luminescence and thermo-luminescence properties of CSAO-CSO: Er 3+ were also investigated systematically. Our results combine the fields of up-conversion and persistent luminescence, which may support other explorations of new kinds of long-persistent and up-conversion materials.
研究领域:
材料科学
·
生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xue Hao,Ting Wang,Xuanyu Zhu,Lihui Hou,Lin Nie,Haozhe Liu,Yang Yue,Xin An,Qingshan He,Xue Yu
Low-temperature anticounterfeiting technologies play a crucial role in ensuring the authenticity and integrity of temperature-sensitive products such as vaccines, pharmaceuticals, and food items. In this work, a low-temperature anticounterfeiting route based on the differentiated photoluminescence (PL), PersL, and thermally stimulated luminescence (TSL) behaviors of metal halide perovskite, pure CsCdCl3, and CsCdCl3:10% Te4+ is proposed. The CsCdCl3 host exhibits pronounced color shifts, encompassing PL, PersL, and TSL behaviors, ranging from blue to yellow and orange as the temperature rises from 100 K to room temperature. This color change is attributed to a change in the luminous center (from the D3d octahedron to the C3v octahedron). Conversely, the addition of Te4+ as the luminescence center inhibits the matrix emission, maintains the characteristic orange emission of Te4+, and regulates the trap distribution of the matrix at low temperature and the TL luminescence intensity. This work highlights the significant promise of CsCdCl3:10% Te4+ and CsCdCl3 phosphors as innovative low-temperature anticounterfeiting technologies, especially for cold-chain vaccine safety monitoring.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
化学
·
制药技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-7
·
IF 2.8
Yuan Lifang,Wang Junzhong,Huang Zhijin,Shen Kaixiang
Long afterglow phosphors have garnered significant attention for their ability to emit light long after excitation ceases. Afterglow emission relies on metastable trap levels within the bandgap of the host materials. Effective trap engineering strategies to optimize traps are critical in determining the afterglow performance. In this study, we investigate the codoping of Bi 3+ and Er 3+ into LiTaO 3 to enhance afterglow performance. Through high-temperature solid-state synthesis, a series of LiTaO 3 :x%Bi 3+ , y%Er 3+ (x = 0 or 0.5%, y = 0.1–4.0%) samples were prepared successfully. Structural characterization confirmed the successful incorporation of Bi 3+ and Er 3+ into the Li⁺ sites without disrupting the host lattice. Photoluminescence studies revealed that Bi³⁺ codoping significantly enhances the green emission of Er³⁺, with optimal performance achieved at 1.0% Er 3+ doping. Thermoluminescence (TL) analysis demonstrated the presence of traps with the depth of 0.748 eV, enabling prolonged afterglow emission at room temperature. The afterglow mechanism involves charge carrier storage in traps under UV excitation, followed by thermal release and recombination at luminescent centers, facilitated by energy transfer from Bi 3+ to Er 3+ . This work provides a strategy for designing a long afterglow phosphor through controlled codoping, offering insights into trap engineering and energy transfer processes in perovskite-based luminescent materials.
研究领域:
材料科学
·
光学材料
·
固体物理
·
发光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yuqiang Wang,Jia Yu,Yimin Shi,Xiangyu Zhang,Dangli Gao
Deep-trap long persistent luminescence (PersL) materials exhibit significant advantages in optical information storage due to their unique carrier trapping-release dynamics. However, the lack of effective trap control methods accompanied with the unclear underlying mechanisms lead to weak luminescence responses of PersL materials to excitation fields, which has almost hindered all related applications. Herein, a series of Sr₃Lu₂Ge₃O₁₂:Ln (Ln = Tb, Ti, Pr, and Dy) phosphors were designed and developed. The effects of doped ions on photoluminescence and the kinetic processes of fluorescence responses to photo/thermal excitation fields were systematically studied. The multimodal luminescence response mechanism of trap doublets to excitation fields were deeply analysed by the TL curves and rate equation. The results show that the roomtemperature carrier storage efficiency and duration are positively correlated with trap depth. A trap depth ≥1.0 eV can effectively suppress the room-temperature PersL process, which is beneficial to the stability requirements of high-density optical storage. This study provides design concepts for the controlled luminescent characteristics in deep-trap PersL materials and their applications in information storage.
研究领域:
材料科学
·
光物理学
·
功能材料
·
光学存储
·
固态化学
✓ 已验证
产品关联
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
·
发光学
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 12
·5684-5693
·
IF 13.3
Panqin Wang,Jiaren Du,Tengyue Wang,Shaoxing Lyu,Rik Van Deun,Dirk Poelman,Hengwei Lin
Despite the substantial progress made, the responsiveness of thermo-responsive materials upon various thermal fields is still restricted to monochromatic visualization with single-wavelength light emission. This stems from a poor understanding of the photophysical processes within the materials and the unvarying optical performance of luminescent centers’ response to various ambient temperatures. Conventional techniques to assess the inhomogeneities of thermal fields can be time-consuming, require specialized equipment and suffer from inaccuracy due to the inevitable interference from background signals, especially at high temperature. To this end, we overcome these limitations for the first time, to flexibly visualize temperature inhomogeneities by developing a thermochromic smart material, SrGa12−xAlxO19:Dy3+. Two distinct modes of thermochromic properties (steady-state temperature-dependent luminescence and thermally stimulated luminescence) are investigated. It is revealed that the abundant colors (from yellow, green to red) and amazing color-changing features are due to the superior optical integration of the host (SrGa12−xAlxO19) and dopant (Dy3+) emissions under specific thermal stimulations. We suggest that this thermo-responsive smart material can be used to realize highly efficient and simple visualization of invisible thermal distribution in industry and beyond.
研究领域:
材料科学
·
光学工程
·
热物理学
·
功能材料
·
工业检测
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ruiting Zhang,Yahong Jin,Lifang Yuan,Kaiyuan Deng,Chuanlong Wang,Guangting Xiong,Li Chen,Yihua Hu
Photochromic materials usually have different physical and chemical properties when they are in different states. Inorganic photochromic materials are widely used in the fields of information storage, optical switches and sensors due to their long lifetime, good thermal stability and fatigue resistance . However, the current inorganic photochromic materials, possessing a unitary optical property , cannot fulfill the requirement of multimodal high-level security anti-counterfeiting. In this work, we report the multiple optical behaviors integrated inorganic photochromic Er 3+ -doped strontium hafnate ceramics. It integrates multiple optical functions, including photochromism, downshifting photoluminescence , up-conversion luminescence, afterglow, and thermoluminescence . The fluorescence modulation contrast (FMC) maximum of SrHfO 3 : Er 3+ can achieve as high as to 77.21% in the mode of photochromism-driven the quenching of downshifting photoluminescence. The FMC maximum can approach 70.24% in the mode of photochromism-driven the quenching of up-conversion luminescence. By alternating the light stimulation and thermal field effect, both photochromism and fluorescence modulation exhibit excellent stability and robust fatigue resistance. The mechanisms of the observed photochromism, downshifting and up-conversion luminescence, fluorescence modulation, afterglow, and thermoluminescence were studied systematically. The combination of the multiple optical behaviors functionalizes the as-obtained material for versatile applications. As a proof of concept, a flexible film was designed and prepared, demonstrating the practical application of SrHfO 3 : Er 3+ material for multimodal high-level security anti-counterfeiting.
研究领域:
材料科学
·
光学
·
光子学
·
安全与防伪
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Tiansong Dai,Guifang Ju,Yang Lv,Yahong Jin,Haoyi Wu,Yihua Hu
Here, a new LiYGeO 4 : Eu 3+ phosphor exhibiting long red persistent luminescence (PerL) is developed herein. Experimental results show that LiYGeO 4 : Eu 3+ with a low doping concentration of Eu 3+ emits high-intensity red PerL, which lasts for more than 21 h. The red PerL of the preirradiated LiYGeO 4 : Eu 3+ phosphor can be repeatedly excited to increase its intensity via short-term stimulation using low-energy near-infrared (NIR) light. Furthermore, LiYGeO 4 : Eu 3+ exhibits strong intrinsic emission, enhancing the f-f emission of Eu 3+ . The PerL emission, photoluminescence (PL) emission, and thermoluminescence (TL) spectra are identical, suggesting the emission originating from the host and Eu 3+ center. TL measurements were conducted to intensively study the trap characteristics of LiYGeO 4 : Eu 3+ using the Booth-Bohun and T m -T stop methods. Results reveal the underlying mechanism of the PerL and the importance of Eu 3+ as the introduced traps in LiYGeO 4 : Eu 3+ . LiYGeO 4 : Eu 3+ with a high doping concentration of Eu 3+ exhibits excellent PL properties and thermal stability, with its quantum efficiency surpassing those of commercial phosphors such as Y 2 O 3 : Eu 3+ , suggesting its potential application in solid-state lighting. Thus, the doping of LiYGeO 4 : Eu 3+ with low and high concentrations of Eu 3+ can be helpful in fabricating materials exhibiting different luminescence properties.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
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
危险品化学品经营许可证（带存储）