CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 16
·21735-21741
·
IF 5.6
Meng Liu,Jie Shao,Xiyang Li,Yu Guo,Chunxiao Lu,Shanjun Ke,Haiqin Sun,Qiwei Zhang
Photochromic (PC) materials with persistent luminescent (PersL) behaviors show potential applications in advanced anti-counterfeiting and optical storage fields. However, it is difficult to simultaneously achieve PC and PersL properties in a single host, due to their different positions of defect energy levels between conduction band and valence band. In this work, a new strategy is proposed to obtain two features by constructing two-phase composites of photochromic BaMgSiO 4 :Eu 2+ and long afterglow Sr 2 MgSi 2 O 7 :Eu 2+ /Dy 3+ materials. The optimized composite sample not only exhibited the reversible white-purple color change by alternating 365 nm and 520 nm light irradiation, but also showed the blue afterglow luminescence for more than 20 min. The designed anti-counterfeiting component based on the composite sample provides a higher-level security anti-counterfeiting than conventional PC materials. These results may facilitate more innovative designs for future dynamic anti-counterfeiting and optical storage applications.
研究领域:
材料科学
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光学材料
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防伪技术
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光子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Xiangyu Yin,Ye Zhao,Shuai Li,Chunxiao Lu,Yigui Sun,Junyan Zhang,Xuanhang Wang,Zhongzhi Wang,Huijing Yang,Yong Li,Qiwei Zhang
Photochromic flexible materials have demonstrated broad applications in wearable devices due to their conformability, fast photo-response, and long cycling lifetime. However, single-component organic or inorganic systems often face challenges in balancing flexibility with reversible cycling stability. Herein, BaMgSiO 4 :Eu 2 + (BMS:Eu) and BaMgSiO 4 :Eu 2+ /Fe 3+ (BMS:Eu/Fe)-based photochromic flexible films were fabricated by embedding inorganic powders into thermoplastic polyurethane (TPU) via electrospinning technique. Under 365 nm irradiation, the BMS:Eu/Fe system exhibits superior photochromic performance (Δ R = 37.78 %), whereas the BMS:Eu system shows higher photoluminescence modulation capability (Δ R i = 25.63 %). Both systems achieve their maximum optical response within 5 s and maintain stable performance over 10 cycles. This work realizes a dual-mode photochromic-photoluminescent response and visual regulation under 365 nm excitation, showing potential applications in wearable technology and smart clothing.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yigui Sun,Chunxiao Lu,Fen Zhao,Shuai Li,Ye Zhao,Xiangyu Yin,Yong Li,Qiwei Zhang
Eu/La co-doped BaMgSiO 4 photochromic ceramics were fabricated via tape casting, which effectively improves the mechanical properties of the material. • The obtained ceramics exhibit high photochromic contrast, stable thermal fading performance and efficient reversible luminescence modulation. • Oxygen vacancies generated by Eu/La co-doping trigger dual-mode photoresponse, enabling multifunctional optical and flexible wearable applications. Inorganic photochromic materials with reversible photoresponse are widely applied in optical anti-counterfeiting, information storage and visual sensing. However, it remains a critical challenge to simultaneously achieve high strength and multimodal photoresponse in a single photochromic system. In this study, Eu 2+ /La 3+ co-doped BaMgSiO 4 photochromic ceramics are fabricated by tape casting. La 3+ doping effectively refines grains and improves density, leading to enhanced mechanical properties with Vickers hardness of 6.62 GPa and fracture toughness of 3.52 MPa·m 1/2 . Optical measurements confirm that the ceramic achieves a photochromic contrast of 80.2% (reflectance at 525 nm) and luminescence modulation of 34.4% (Eu 2+ emission at 443 nm) upon 365 nm irradiation for 4 s, with favorable linear thermal fading behavior. This work develops mechanically enhanced ceramics with dual-mode photochromic response, offering novel technical strategies and theoretical insights for advancing inorganic photochromic ceramics toward practical applications.
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DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 15
·1900213
·
IF 7.125
Youtao Ren,Zhengwen Yang,Mingjun Li,Jiufeng Ruan,Jingyuan Zhao,Jianbei Qiu,Zhiguo Song,Dacheng Zhou
Reversible upconversion luminescence modification based on photochromism has received considerable interest due to its potential applications in optical storage and high-sensitivity optical switches. However, stimulation-induced bleaching by an external thermal field is generally used for photochromism-induced reversible upconversion luminescence modification, which limits its practical application. In this work, a gray BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic is prepared, exhibiting the photochromism from gray to pink color when stimulated by 254 nm light. Interestingly, the pink BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic can be bleached by either a 473 nm laser or thermal stimulation. The reversible change between gray and pink color exhibits excellent reproducibility over several cycles by alternating between 254 and 473 nm (or thermal) light stimulation. The influence of the reversible photochromism of the BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic on its upconversion luminescence is investigated. Reversible modification of the upconversion luminescence is demonstrated by alternating between 254 and 473 nm (or thermal) light stimulation. For reversible modulation of the upconversion luminescence, excellent reproducibility is realized after several cycles. As an example, the application of the BaMgSiO 4 :Yb 3+ ,Tb 3+ photochromic ceramic as an anti-counterfeiting agent is described.
研究领域:
材料科学
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光学
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光子学
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防伪技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rujun Yang,Long Chen,Cunjian Lin,Honghui Huang,Zishuang Wu,Chenhan Zhan,Yixi Zhuang,Rong-Jun Xie
Photochromism and persistent luminescence (PersL) are two fascinating light-responsive effects in phosphors, both of which have found widespread applications in optical switching, optical anticounterfeiting and information storage. However, the relationship between photochromism and PersL has not been clarified, thus greatly limiting the use and design of the light-responsive materials in multifunctional applications. Herein, taking BaMgSiO 4 :Eu 2+ , TM (TM = transition metal: Fe, Co and Cr) as model materials, we first reveal that photochromism and PersL could be two independent photophysical effects, although they are both related to the charge carrier trapping/detrapping processes. Notably, photochromism and PersL show have different responses to light wavelengths, and the depth of traps involved in the two effects is also quite different. Moreover, by codoping different transition metal elements, we obtain the largest reflectance difference of ∼71 % among inorganic photochromic materials reported thus far, and demonstrate interesting multicolor photochromism, including magenta, golden and pink. Based on their distinct response to light and temperature, a multi-functionalized optical anticounterfeiting technology is proposed, which may open up a new avenue for applying the light-responsive materials in flexible electronics and wearable devices.
研究领域:
材料科学
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光学
·
光子学
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纳米技术
·
化学
✓ 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）