Laser & Photonics Reviews
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2025
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IF 10
Xinru Huang,Hang Yang,Yi Wei,Haonan Ju,Wei Wang,Dong Tu,Guogang Li
Mechanical quenching (MQ) represents a distinctive mechano-optical response, in which the afterglow intensity is quenched under the applied mechanical stress. Compared with mechanoluminescent (ML) materials, the research on physical mechanism and sensing application of MQ materials is still insufficient. Moreover, existing mechano-optical materials typically respond only to dynamic stress, while ML materials are unable to exhibit luminescence under static stress, restricting their utility in stress-sensing applications. In this work, the MQ characteristics of CaZnOS:Cu + are systematically studied, which displays a linear mechano-optical response to dynamic and static stress. Furthermore, this material shows a sensitive response to micro-strain in stretching tests. Therefore, a novel mechanical switch device is introduced combined with CaZnOS:Cu + and a ML material LiTaO 3 :Tb 3+ . By comparing the alteration in luminescence intensity during stretching, different stages of stress are digitally encoded, achieving both dynamic and static stress sensing and effectively differentiating the information output. These findings provide a new approach for multi-mode dynamic and static stress sensing by utilizing mechano-optical materials and pave a significant avenue for the information integration of mechano-optical materials in the field of stress sensing.
研究领域:
材料科学
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光学
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力学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2025
·Vol. 31
·期 24
·e202500249
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IF 3.7
Baoqing Sun,Ting Li,Congliang Shen,Mingyue Zhang,Zhaoyu Guang
Graphical Tb 3+ , Sm 3+ mono-/co- doped LiTaO 3 phosphors are prepared by high-temperature solid-state reaction. Emission color of LiTaO 3 : Tb 3+ , Sm 3+ shifts from green to yellow as Sm 3 ⁺ concentration increases due to energy transfer from Tb 3+ to Sm 3+ . Time-resolved color evolution from green to orange is achieved by combining the trap-assisted afterglow of Tb 3+ and stable photoluminescence of Sm 3+ . Currently, static fluorescent anti-counterfeiting technology struggles to cope with the increasingly sophisticated counterfeiting techniques, making the dynamic multimode regulation scheme an urgent necessity. Herein, Tb 3+ , Sm 3+ mono-/co-doped LiTaO 3 (LTO) phosphors are prepared by high-temperature solid-state method. Under 254 nm excitation, the emission chromaticity of LTO: Tb 3+ , Sm 3+ is modulated from green to yellow by increasing Sm 3+ content due to Tb 3+ → Sm 3+ energy transfer. The diverging luminescence thermal stability of LTO: Tb 3+ and LTO: Sm 3+ is uncovered, which is governed by their distinct vacuum-referenced binding energy (VRBE) levels and charge compensation mechanisms. Based on the time-domain difference between the trap-assisted afterglow of Tb 3+ and the photoluminescence of Sm 3+ , a dynamic anti-counterfeiting pattern that changes from green to orange over time is designed. This work provides a novel material design strategy for time-resolved color signatures and multi-modal dynamic optical encryption.
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 RARE EARTHS
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2026
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IF 9.6
Zhengren Tao,Lingying Xu,Yinghan Wang,Qingdi Liu,Shi Ye
Bulk ceramics of afterglow phosphors are preferred for real applications with applied external stimuli like electric field, force and heat. However, sintering powdered afterglow phosphors with high-temperature-volatile components to bulk form normally leads to deterioration or even loss of persistent luminescence (PersL), such as the case of LiTaO 3 :Tb 3+ . This study adopted a strategy of using nanosized precursors prepared by exfoliation and molten salts methods for the subsequent sintering procedure to form LiTaO 3 :1 mol% Tb 3+ bulk nanoceramics, which show outstanding PersL compared to bulk microceramics with absence of PersL. The dynamics of carriers, including electrons, holes and non-static V Li defects were detailedly investigated in the charging process of the bulk nanoceramics at elevated temperatures. It is found that defects not only act as traps storing and releasing electron-hole carriers, but also function as carriers themselves in the LiTaO 3 :1%Tb 3+ bulk nanoceramics. Temperature-dependent electricity and luminescence verify the hopping process of Li + / V Li above 225 °C . The hopping leads to accelerated release of holes initially captured by V Li and the subsequent non-radiative recombination with electrons from V O . It features an apparent and significant intensity decline during the charging process compared to low temperatures or cases without PersL. The bulk nanoceramics possess a temperature-triggered capability for anti-counterfeiting and information storage. These findings contribute to a strategy to fabricate bulk ceramics which are sensitive to sintering procedure, and provide valuable insights into the underlying mechanisms and the rational design of PersL materials.
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DOI
高影响因子
ADVANCED MATERIALS
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2024
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IF 27.4
Hang Yang,Yi Wei,Haonan Ju,Xinru Huang,Jun Li,Wei Wang,Dengfeng Peng,Dong Tu,Guogang Li
Elastico-mechanoluminescence technology has shown significant application prospects in stress sensing, artificial skin, remote interaction, and other research areas. Its progress mainly lies in realizing stress visualization and 2D or even 3D stress-sensing effects using a passive sensing mode. However, the widespread promotion of mechanoluminescence (ML) technology is hindered by issues such as high stress or strain thresholds and a single sensing mode based on luminous intensity. In this study, a highly efficient green-emitting ML with dual-mode stress-sensing characteristics driven by microscale strain is developed using LiTaO 3 :Tb 3+ . In addition to single-mode sensing based on the luminous intensity, the self-defined parameter ( Q ) is also introduced as a dual-mode factor for sensing the stress velocity. Impressively, the fabricated LiTaO 3 :Tb 3+ film is capable of generating discernible ML signals even when supplied with strains as low as 500 µst. This is the current minimum strain value that can drive green-emitting ML. This study offers an ideal photonic platform for exploring the potential applications of rare-earth-doped elastico-ML materials in remote interaction devices, high-precision stress sensors, and single-molecule biological imaging.
研究领域:
材料科学
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光电子学
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传感器
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生物医学工程
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DOI
高影响因子
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