Multiple optical thermometry and dynamic anti‐counterfeiting based on multicolor emission in Y₂GaSbO₇:Bi³⁺,Er³⁺ phosphor

Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 4, 2025

Abstract Optical thermometric and anti‐counterfeiting multifunctional materials hold great promise for practical applications, yet their development continues to encounter considerable challenges. Here, we successfully developed a new Bi 3+ ,Er co‐doped Y 2 GaSbO 7 powder with multicolor luminescence. Through adjusting the excitation wavelengths, emissions in violet, blue, green, orange are achieved. The phosphor demonstrates remarkable thermochromism due distinct temperature‐dependent luminescence of Er , confirmed under irradiation at 312 or 980 nm. By reducing power nm laser increasing laser‐to‐sample distance, emitting color can be precisely tuned from gold‒yellow yellow‒green orange‒red. These diverse luminescent characteristics enable creation multilevel system. Moreover, four‐mode optical thermometry an optimal relative sensitivity 1.98% K −1 high thermal resolution 0.15 K, signal reversibility was established using fluorescence intensity ratio decay time. results disclose that :Bi is promising candidate temperature monitoring dynamic applications.

Язык: Английский

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Thermally coupled energy levels of rare-earth Er-based nanomaterials for high-precision and reliable temperature sensing

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179919 - 179919

Опубликована: Март 1, 2025

Язык: Английский

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Multilayer Core–Shell Upconversion Nanoparticles for Dynamic Dual‐Color Emission Switching and High‐Sensitivity Temperature Sensing in Information Security

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract Information security and temperature sensing play vital roles in various areas such as financial transactions, product authentication, privacy protection. However, integrating precise control information technologies with highly sensitive remains a significant challenge. Here, multilayer core–shell upconversion nanoparticle (UCNP) system is presented that enables dynamic dual‐color emission switching through controlled energy transfer mechanisms. By tuning the excitation wavelength, power density, pulse width, exhibits green‐to‐blue transition multimodal tunability. Using fluorescence intensity ratio techniques, maximum relative sensitivity of 1.85% K −1 , demonstrating superior detection performance achieved. Furthermore, tunable multicolor properties UCNPs enable diverse applications security, including pattern recognition, Morse code encryption, quick response code‐based anti‐counterfeiting. This research not only broadens application scope environmental monitoring but also offers perspectives on design multifunctional optical materials.

Язык: Английский

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Exploring the dielectric properties, glass ability and ferroelectric phases in the BaO-Bi2O3-TiO2-B2O3-Al2O3 system

Journal of the European Ceramic Society, Год журнала: 2025, Номер unknown, С. 117527 - 117527

Опубликована: Май 1, 2025

Язык: Английский

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