JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Xin Li,Xusheng Wang,Rui Hu,Yanxia Li,Xi Yao
We report a novel mechanoluminescent phosphor Li 1−x Ca x Si x Ta 1−x O 3 :0.01Pr 3+ (x = 0–0.04). The crystal structure, photoluminescence (PL), optical diffuse reflectance spectra, afterglow (AG), fluorescence decay curves, and mechanoluminescence (ML) properties were investigated. To clarify the defect types and the mechanoluminescence mechanisms, an X-ray photoelectron spectroscopy (XPS) and thermoluminescence curve (TL) were measured. The dopants Ca 2+ and Si 4+ ions occupied the Li+ and Ta 5+ sites, respectively. An optimal sample Li 0.98 Ca 0.02 Si 0.02 Ta 0.98 O 3 :Pr 3+ was obtained with great enhancement in mechanoluminescence intensity, higher than that of non-doped sample LiTaO 3 :Pr 3+ by 262%. And the compression threshold, over which the ML intensity could not maintain the linear increase, has also been greatly improved. Furthermore, the stable output of Tribo-L was achieved, which was visible to the naked eye. A probable mechanism was proposed to illustrate the mechanoluminescent process in Li1-xCaxSixTa1-xO3:0.01Pr3 + (x = 0–0.04). The study indicates that adjusting trap distribution by substituting host ions may be a novel way to develop high-quality mechanoluminescence.
研究领域:
材料科学
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光学
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 29
·17180-17184
·
IF 3.119
Xiaojing Dou,Yang Li,Ru Kang,Huiwang Lian,Zhenzhang Li
Trivalent terbium-doped oxycarbonate (La2O2CO3:1%Tb3+) one-dimensional nanorods are synthesized via a facile precipitation method. The average length of La2O2CO3:1%Tb3+ nanorods is 184.5 nm. Doping Tb3+ ions led to several visible emission peaks at 486 nm, 542 nm, and 587 nm under excitation of 258 nm wavelength light. The green afterglow at 542 nm can be detected almost 600 s after ceasing the UV-light irradiation. It can be calculated that the La2O2CO3:1%Tb3+ sample has one shallow trap depth (E = 0.848 eV) by measuring the thermoluminescence. All the results indicate that a simple precipitation method can synthesize a one-dimensional nanorod with green persistent luminescence.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Chenwei Xiong,Rui Hao,Kewen Tao,Huashan Li,Shaopeng Lin,Decai Ma
This study has demonstrated that lithium niobate doped with praseodymium (LiNbO 3 :Pr), which initially did not exhibit persistent luminescence(PersL), can display significant PersL performance through the modulation of the lithium-to-niobium ratio (R LN ). By adjusting the R LN to 1, LiNbO 3 :Pr achieved enhanced PersL, lasting several minutes, with the afterglow's duration further influenced by the R LN . Thermoluminescence (TL) assays and energy diagram analyses have elucidated that the presence and depth of oxygen vacancy defects are critical for both the emergence and longevity of PersL LiNbO 3 :Pr polycrystals . These insights enhance the understanding of PersL mechanisms in lithium niobate crystals and highlight their potential for application in optical information storage.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2018
·
IF 1.861
Jie Lu,Linjiang Shen
Recently, developing free rare-earth (RE) doped afterglow phosphors has received great attentions in the lighting field. In this work, we prepare and report a RE-free phosphor, Na 2 BeGeO 4 :Mn 2+ , which can simultaneously emit the green fluorescence and afterglow luminescence upon excitation at UV light. Our results reveal that the as-prepared samples crystallize in orthorhombic type with the space group of Pmn 2 1 (31). The green emission is a broad band centered at 525 nm, corresponds to the 4 T 1 ( 4 G)- 6 A 1 ( 6 S) transition of Mn 2+ ions. After exposing to a 254 nm UV lamp for 10 min, the green afterglow luminescence seen with naked eyes can last more than 5 h. Together with the structural analysis and thermoluminescence (TL) spectra, the afterglow luminescence mechanism is also discussed in this work.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 16
·2300187
·
IF 9
Nan Zhang,Rui Zhang,Xieming Xu,Fang Wang,Zhicheng Sun,Shuaihua Wang,Shaofan Wu
X-ray flat-panel detectors are widely used for nondestructive detection of internal information in medical radiography and industrial applications. However, a persisting challenge is the application of radiography on highly curved 3D objects to realize flexibility and information storage for the fabrication of flexible large-area X-ray detectors. This study demonstrates a halide-based double perovskite Cs 2 Na 0.9 Ag 0.1 LuCl 6 :Dy 3+ by a hydrothermal reaction. The as-prepared crystals exhibit afterglow features through a co-doping strategy of Dy 3+ and Ag + ions. The double perovskite material with doping modification exhibits excellent scintillation properties with high sensitivity, low detection limit, and high radiation stability. In addition, flexible scintillator detectors are fabricated with an area of 8.0 × 6.0 cm 2 by the blade-coating strategy, which has a high spatial resolution of 11.2 lp mm −1 @MTF = 0.2. Based on the long afterglow properties, the Cs 2 Na 0.9 Ag 0.1 LuCl 6 :Dy 3+ flexible film exhibits thermoluminescence after turning off the X-ray, thereby having strong potential for X-ray imaging of nonflat and irregular objects.
研究领域:
材料科学
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医学成像
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放射学
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产品关联
DOI
高影响因子
Communications Materials
·
2025
·Vol. 6
·期 1
·1-8
·
IF 9.6
Lin Cunjian,Yang Rujun,Wu Zishuang,Wang Yajing,Zhan Chenhan,Miyata Hirohisa,Zeng Xiankan,Zheng Yuantian,You Shihai,Lv Ying,Zhuang Yixi,Xie Rong-Jun,Ueda Jumpei
Persistent luminescence (PersL) in inorganic materials, lasting from seconds to even days, has attracted considerable attention. Despite the promise of electric power-driven PersL for lighting and display device applications due to its convenience and manageability, studies on electrically driven inorganic PersL are lacking. Here, we report an inorganic PersL in electroluminescent devices, which shows an energy storage effect that persists beyond 24 h after charging with an alternating current electric field at 250 K. The spin-coating method-prepared emission layer composites consist of a small bandgap copper-doped zinc sulfide core, a high dielectric constant alumina shell and a chemically passivated dielectric polydimethylsiloxane medium (ZnS:Cu@AlO x @PDMS), and these composites exhibit well-distributed electric fields and excellent operational stability. Thermoluminescence characterization reveal that PersL with an ~ 0.3 eV trap depth in electroluminescent devices mainly arises from the charge separation via hot-electron impact excitation and charge trapping within trap states in the emission layer. This study on electrically chargeable PersL in alternating current-driven electroluminescent devices can enhance our understanding of luminescence mechanisms in inorganic semiconductors.
研究领域:
材料科学
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光学工程
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半导体物理
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产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
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2020
·Vol. 9
·期 12
·126006
·
IF 2.142
Yu-Guo Yang,Zhi-Jian Li,Xiang-Gang Zuo,Rui Zhang,Xu-Ping Wang,Qing-Gang Li,Bing Liu,Xian-Shun Lv,Lei Wei,Yuan-Yuan Zhang
We synthesized Dy3+ doped SrLaGa3O7 phosphors via a sintering process at 1350 °C under atmosphere. The X-ray diffraction data demonstrate that they have the pure tetragonal phase, meaning the successful substitution of Dy3+ in SrLaGa3O7 host. Monitoring at 572 nm, Dy3+ doped SrLaGa3O7 phosphors show a series of excitation bands within 275–475 nm. Exciting at 342 nm, Dy3+ doped SrLaGa3O7 phosphors show emission bands in the range of 450–700 nm. The emission bands respectively locate in blue, yellow and right light regions, which respectively correspond to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2 transitions of Dy3+. The concentration quenching is induced by dipole-dipole interactions among neighboring Dy3+ ions. There is only one peak in the thermoluminescence glow curves of Dy3+ doped SrLaGa3O7 phosphors, indicating that there is only one type of trap center in these phosphors. The trap depth is calculated to be 0.754 eV.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zi-Hao Chen,Qiang Tang,Jian-An Zeng,Haijiao Xie,Rui Zou,Jing Wang,Bo-Mei Liu
X-rays hold broad application prospects across diverse domains. However, improper utilization poses a security risk to human safety. Recently, radiochromic materials have emerged as promising candidates for the detection and imaging of X-ray radiation. Herein, a novel material, La 2 MgZrO 6 :Pr 3+ , was developed that exhibits reversible photochromic induced by X-ray irradiation. When the material is irradiated with an X-ray, the color of the material changes from white to brown ( ΔR ≈ 32 %), and this color can be rapidly reversed when illuminated with a 450 nm blue lamp. Meantime, the radiation dose (0–120 Gy) can be initially determined according to the color depth of the material, and the dose can be accurately measured by thermoluminescence. Furthermore, a lab-made X-ray imaging system is designed, which can be used for both bright field and dark field dual-mode X-ray imaging with considerable resolution (∼4.5 lp mm −1 ). These findings could revolutionize the next generation of X-ray detection materials and devices, and drive progress in this field.
研究领域:
材料科学
·
医学影像
·
辐射检测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tianshuai Lyu,Pieter Dorenbos,Zhanhua Wei
Developing X-ray charged dosimeters with excellent charge carrier storage capacity and stability is challenging. Such energy storage dosimeters have fascinating use in developing novel applications, for instance, in radiation detection, advanced multimode anti-counterfeiting, and flexible X-ray imaging of curved objects. Herein, novel LiTaO 3 :Ln 3+ ,Eu 3+ (Ln = Tb or Pr) perovskite dosimeters are reported by combining the vacuum referred binding energy (VRBE) diagram of LiTaO 3 and the optimization of dopant’s concentration and compound synthesis condition. Based on the VRBE diagram prediction, charge carrier capturing and de-trapping processes in Eu 3+ and/or Ln 3+ (Ln = Tb or Pr) doped LiTaO 3 will be studied to unravel the role of Eu 3+ as a good electron trapping centre and to discover a record storage phosphor. The ratios of the thermoluminescence intensity of the optimized LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ to that of the state-of-the-art BaFBr(I):Eu 2+ , Al 2 O 3 :C, or NaLuF 4 :Tb 3+ are 5.2, 8.8, or 2.8, respectively. The charge carriers can be stored more than 1000 h in LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept anti-counterfeiting application will be demonstrated by combining the colour-tailorable photoluminescence, afterglow, thermally, or optically stimulated luminescence in LiTaO 3 :0.005Tb 3+ ,xEu 3+ and LiTaO 3 :0.005Pr 3+ ,0.001Eu 3+ . Multimode anti-counterfeiting application will be proposed by combining a high absolute X-ray scintillation light yield of 19000 ± 1800 ph/MeV of LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept flexible X-ray imaging application will be demonstrated by using the optimized LiTaO 3 :0.005Tb 3+ , 0.001Eu 3+ dispersed in a silicone gel film.
研究领域:
材料科学
·
辐射探测技术
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Photochem
·
2025
·Vol. 5
·期 4
·
IF 2.3
Xiaoman Shi,Huimin Li,Ruiping Deng,Su Zhang,Hongjie Zhang
Long persistent phosphors are widely used in many fields, such as LED, bioimaging, urgent lighting, temperature sensors, etc. Although green and blue long persistent phosphors are well developed, efficient orange-yellow long persistent phosphors are still relatively rare. In this work, a novel orange-yellow long-persistent phosphors Ca2LuScGa2Ge2O12:xPr3+(CLSGGO:xPr3+, x = 0.003, 0.005, 0.01, 0.02, 0.03, 0.04, 0.05) are prepared and systematically investigated through its crystal structural information, photoluminescence, and persistent luminescence properties. Under ultraviolet light excitation, these phosphors exhibit orange-yellow emission stemming from the3P0and1D2multiple electron transitions in the 4f level of Pr3+ion. In addition, the material exhibits bright persistent luminescence. The complex garnet matrix structure of Ca2LuScGa2Ge2O12provides excellent conditions for the formation of traps. Through the testing of thermoluminescence curve and function fitting, the density and depth of traps are studied; also, the storage and release process of carriers in the material are calculated in detail. A reasonable persistent luminescence mechanism is proposed for CLSGGO:0.01Pr3+. This work enriches the research content of photoluminescence and long persistent luminescence of Pr3+-doped garnet-based phosphors and paves the way for the future research of long persistent luminescent materials doped with rare earth ions.
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产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
J. Du,S. Lyu,K. Jiang,D. Huang,J. Li,R. Van Deun,D. Poelman,H. Lin
Persistent luminescent materials containing deep-level traps have attracted extensive research interest in the field of optical information storage due to their unique features of long-lasting emission, energy storage, and controllable photon release upon external stimulations. However, the lack of suitable luminescent materials with deep-level traps is still the bottleneck of such an optical storage application. Herein, we report a series of persistent luminescent materials with reddish-orange emissions and controllable photon release upon thermal stimulation. Through substitution of Sn by Si, more and deeper trap levels are achieved in Sr 2 SnO 4 :Sm 3+ ,Si 4+ phosphors. Moreover, both ultraviolet light and high-energy X-ray irradiations can induce reddish-orange emitting persistent luminescence from the as-synthesized samples. Rewritable optical information storage and readout based on photon trapping and de-trapping processes are demonstrated. Optical information can be handily encoded using a commercially available 365 nm light-emitting diode, and decoded upon thermal stimulation. The Sr 2 SnO 4 :Sm 3+ ,Si 4+ phosphors as presented in this work show a great promise for rewritable optical data storage and information encryption.
研究领域:
材料科学
·
光功能材料
·
固态化学
·
信息存储技术
·
发光物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）