Dual-mode multicolor luminescence based on lanthanide-doped Na2CaGe2O6 phosphor for anticounterfeiting application

Article Chemistry, Physical

Excellent multi-color emission and multi-mode optical ratiometric thermometer in (Ca, Tb, Eu, Sm)Nb2O6 phosphors based on wide O2-→Nb5+ CTB

Zhen Sun et al.

Summary: This study developed two temperature probes and achieved multi-color tuning through far infrared excitation, demonstrating excellent temperature sensing performance.

APPLIED SURFACE SCIENCE (2022)

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Article Chemistry, Physical

A novel differential display material: K3LuSi2O7: Tb3+/Bi3+ phosphor with thermal response, time resolution and luminescence color for optical anti-counterfeiting

Mingxuan Zhang et al.

Summary: The study introduces a novel multi-mode anti-counterfeiting strategy based on KLSO phosphors, utilizing three luminescent modes of Bi3+ and Tb3+ ions to achieve differential display and enhance information security.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Optics

Multifunctional optical thermometry based on the transition metal ions doped down-conversion Gd2ZnTiO6: Bi3+, Mn4+ phosphors

Mingxuan Zhang et al.

Summary: Researchers have designed a novel ratio-metric luminescent thermometer GZTO:Bi3+, Mn4+ with excellent thermal sensitivity and a wide temperature measurement range, suitable for high-precision temperature measurement, and with a potential application prospect as a plant growth lamp.

JOURNAL OF LUMINESCENCE (2021)

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Article Materials Science, Ceramics

Dual-mode dichromatic SrBi4Ti4O15: Er3+ emitting phosphor for anti-counterfeiting application

Yujian Wu et al.

Summary: Fluorescent materials have been widely used for anti-counterfeiting purposes, with the study showing the synthesis of dual-mode excited double-color emitting phosphors that have potential applications in anti-counterfeiting.

CERAMICS INTERNATIONAL (2021)

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Article Optics

Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals

Yansong Feng et al.

Summary: Internal hydroxyl impurities have been identified as detrimental factors affecting the upconversion efficiency of upconversion luminescence nanomaterials. By quantifying and adjusting the internal hydroxyl impurity in NaYF4 nanocrystals, researchers have unraveled the microscopic interactions underlying UCL quenching and proposed a concept of Survivor effect to explain the UC dynamical process involving internal hydroxyl. The new quantitative insights obtained from this study are expected to promote the development of highly efficient UC materials.

LIGHT-SCIENCE & APPLICATIONS (2021)

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Article Chemistry, Multidisciplinary

An Advanced Tunable Multimodal Luminescent La4GeO8: Eu2+, Er3+ Phosphor for Multicolor Anticounterfeiting

Pengxiang Pei et al.

Summary: A multimodal La4GeO8: Eu2+, Er3+ material is reported, emitting various colors of light under different excitation wavelengths. The phosphor features excellent stability and humidity resistance, making it suitable for anticounterfeiting applications.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Engineering, Chemical

Wearing an organic coat on nanocrystals of LaF3:Eu3+ to generate dynamic luminescence for optical anti-counterfeit

Xiaofeng Fan et al.

Summary: A new luminescent material for optical anti-counterfeiting was developed by wearing organic Tb(III) complex on nanocrystals, exhibiting dynamic multicolor emissions with higher security level. The research results may provide guidance for the development of temperature-dependent luminescent materials in anti-counterfeiting applications.

ADVANCED POWDER TECHNOLOGY (2021)

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Article Chemistry, Multidisciplinary

Structural and Excitation-Dependent Photoluminescence Properties of Bi0.95-xGdxEu0.05PO4 (0 ≤ x ≤ 0.95) Solid Solutions and Their Anticounterfeiting Applications

Pushpendra et al.

Summary: Lanthanide-doped luminescent nanomaterials have been widely used in various fields, and this study focused on the synthesis of Bi0.95-xGdxEu0.05PO4 solid solutions for anticounterfeiting applications. The samples showed excellent photoluminescence properties and emitted different colors under UV illumination. By replacing Bi3+ ions with Gd3+, the luminescent intensity was enhanced, with optimum properties observed in the Bi0.50Gd0.45Eu0.05PO4 sample for anticounterfeiting purposes.

CRYSTAL GROWTH & DESIGN (2021)

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Article Optics

X-ray-charged bright persistent luminescence in NaYF4:Ln3+@NaYF4 nanoparticles for multidimensional optical information storage

Yixi Zhuang et al.

Summary: Monodispersed nanoscale NaYF4:Ln(3+) nanoparticles with surface-passivated core-shell structures exhibit intense X-ray-charged persistent luminescence and narrow-band emissions tunable from 480 to 1060 nm. The mechanism for persistent luminescence in NaYF4:Ln(3+) is proposed through thermoluminescence measurements and the host-referred binding energy (HRBE) scheme, suggesting the role of lanthanide ions as effective electron traps. These uniform and spherical nanoparticles are dispersible in solvents, enabling new applications such as 3-dimensional optical information storage and inkjet-printing multicolor persistent luminescent nanoparticles.

LIGHT-SCIENCE & APPLICATIONS (2021)

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Review Chemistry, Multidisciplinary

Luminescence anti-counterfeiting: From elementary to advanced

Xiaowei Yu et al.

Summary: Luminescence anti-counterfeiting utilizes the easily changeable luminescence behaviors of materials to prevent forgery of currency, artworks, and product brands. It can be classified into single-level, double-level, and multilevel anti-counterfeiting based on the changes of labels under different conditions. The review summarizes recent achievements in luminescence anti-counterfeiting and discusses the regulation of various factors on anti-counterfeiting labels.

AGGREGATE (2021)

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Article Engineering, Electrical & Electronic

Regulating Mn2+/Mn4+ Activators in ZnGa2O4 via Mg2+/Ge4+ Doping to Generate Multimode Luminescence for Advanced Anti-Counterfeiting

Te Si et al.

Summary: By synthesizing spinel-structured solid solutions, the luminescent centers of Mn2+ and Mn4+ in ZnGa2O4 were effectively regulated, resulting in emission of different colors of light under different excitation conditions, enhancing anti-counterfeiting security.

ACS APPLIED ELECTRONIC MATERIALS (2021)

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Article Chemistry, Multidisciplinary