Persistent‐ and Mechanoluminescence of Er³⁺‐Doped NaYF₄ for Multipurpose Use

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Abstract Advanced functional materials that possess both persistent luminescence (PersL) and mechanoluminescence (ML) have gained considerable attention during the past few years owing to their potential applications in many fields such as two‐dimensional stress sensing, energy‐saving lighting, optical bioimaging. However, combined investigation of PersL ML is still its infancy. Here, property Er 3+ ‐doped NaYF 4 , mainly focusing on characteristic correlation, studied detail. It shown microscaled :Er has advantages against nanoscaled counterpart terms ML, consistent with photoluminescence results. By means pre‐charging trap‐emptying cycle thermoluminescence test, it confirmed come from same trapped charge carriers, belongs trap‐controlled ML. Furthermore, good repeatability proven, regulation realized. Finally, for dynamic anti‐counterfeiting dual‐mode detection X‐ray radiation dose demonstrated.

Language: Английский

---

Trap‐Assisted Mechanoluminescence in Mn²⁺‐Doped Transparent Amorphous Glass for Potential Stress Sensing

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Abstract Mechanoluminescence (ML) materials have shown great promise in stress sensing, structural monitoring, information encryption etc., but are primarily based on crystalline material with limited processability, environmental stability, and optical transparency, which seriously hinder their applications. Here, a highly transparent Mn 2+ ‐doped amorphous glass system significant ML properties is designed. A composition modulation strategy proposed to engineer defects within the network structure, ensures more numerous activate of . Under repeated charging–discharging cycles, samples present remarkable repeatability recovery performance, intensity demonstrates zero‐quenching performance after being placed various solutions for 14 days. Combined Raman, EPR spectra, TL experiments, inherent relationship between traps clarified, where oxygen vacancies responsible generation ML. Based ideal high transparency designed glass, application prospects identification detection evaluated. This work provides design principle accelerate development toward versatile photonic

Language: Английский

---

Persistent luminescence of Dy-doped strontium pyrophosphate with double traps for room temperature qualitative and heated quantitative X-ray dosimetry by naked eyes

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179900 - 179900

Published: March 1, 2025

Language: Английский

---

Facile construction of mechanoluminescence heterojunctions facilitating personalized Anti-Counterfeiting E-signature devices

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162658 - 162658

Published: April 1, 2025

Language: Английский

---

Unleashing the Potential of Defect Engineered Persistent Pr³⁺‐Activated Phosphors for Multi‐Dimensional Anti‐Counterfeiting and X‐Ray Imaging Applications

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Persistent luminescence (PersL) in inorganic phosphors offers great potential for anti‐counterfeiting and optical storage, with optimization of PersL, multicolor tuning, defect engineering. This study presents a Ca 3 Ga 2 Ge O 12: Pr 3+ (CGGO:Pr) phosphor long‐lasting PersL emissions. Aliovalent codoping Er Yb ions optimizes deep/shallow trap redistribution, controlling depths from 0.98 to optimal 0.73 eV through the creation new shallow electron traps (Yb • , ) alongside existing V levels. The smart /Er /Yb :CGGO exhibits three‐dimensional visible emissions under 275 380 nm excitation, as well upconversion 980 laser irradiation. Hybrid density functional calculations, thermoluminescence, positron annihilation lifetime spectroscopy revealed nature different PersL. Together, single system featuring has been developed, exhibiting improved regulated (≈0.73 eV) suitable robust multimodal documents, pharmaceuticals, industrial products. Furthermore, composite PMMA‐CGGO:Pr films have shown remarkable capability X‐ray imaging, achieving resolution 4 lp/mm, which exceeds that commercial Gd S:Tb screens. These findings highlight this work advanced imaging applications, offering enhanced controlled depths.

Language: Английский

---

Deep‐Learning Enhanced SrAl₂O₄: (Eu²⁺, Dy³⁺, Nd³⁺) Mechanoluminescence Film for Distributed Perception of Mechanical Deformation and Fracture

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Mechanoluminescence (ML) sensor‐derived distributing measurement urgently needs to overcome the trade‐off between luminous intensity and afterglow duration. In this article, a strontium aluminate (SrAl 2 O 4 ) based ML sensing candidate is controllably synthesized by solid‐solution reaction of powdered precursors SrCO 3 Al under hybrid doping rare earth cations (Eu 2+ , Dy 3+ Nd at 1400 °C. Compared with traditional SrAl : Eu (SAOEDN) has demonstrated highly enhanced (over two orders increase), robust behavior (300 cycles), tunable performance (50 325 s) after synergistic regulation trap depth (from 0.2 0.88 eV). After in situ compounding SAOEDN epoxy resin matrix, flexible film created for distributed detection engineering strain distribution. The effect triggered mechanical deformation presented an approximately linear dependence higher spatiotemporal resolution. As result, field reconstructed via deep learning‐derived image‐to‐image mapping process eliminating disturbance afterglow. Moreover, capable accurately detecting capturing fracture propagation materials. It suggested promising potential non‐contact stress fields applications.

Language: Английский

---

Self‐Recovering Multicolor Calcium Phosphate Mechanoluminescent Materials for Wearable Skin and Biomedical Applications

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Abstract Mechanoluminescent (ML) materials are promising for applications in structural health monitoring, biomedicine, stress sensing, and distribution visualization due to their ability emit light without external circuits. However, current ML face challenges, including limited luminescent colors, high raw material costs, toxicity, lack of emissions the invisible spectrum. To overcome these Ca 2 P O 7 (CPO) is selected as matrix its excellent piezoelectric properties, low cost, biocompatibility. CPO doped with various ions (X, X = Ce 3+ , Eu 2+/3+ Tb Dy Mn 2+ Sm ) achieve emission bands CPO:X across a wide range wavelengths UV, blue, green, yellow red. Unlike traditional trap‐controlled materials, does not require UV pre‐irradiation exhibits remarkable self‐recovery properties. First‐principles density functional theory (DFT) calculations confirmed that an ideal self‐recovering materials. Based on several practical devices designed, fencing competition scorekeeper, wearable flexible skin, protective dental crown layer. These innovations offer new directions development application

Language: Английский

---

Multicolor Persistent Luminescence for High-Sensitivity Optical Temperature Sensing, Human Motion Detection, and Multimodal Anticounterfeiting Materials

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Multimodal luminescent materials are widely used in noncontact temperature sensors and fluorescent dynamic anticounterfeiting due to their visible persistent luminescence fast optical signal response. To this end, CaY0.99GaO4: 0.01 Bi3+; CaY0.92GaO4: Bi3+, 0.07Eu3+; CaY0.96GaO4: 0.03Er3+ phosphors were prepared using the high-temperature solid-state method. The down-conversion luminescence, up-conversion long mechanical of studied, achieving multicolor luminescence. It was found that 0.07Eu3+ phosphor achieves maximum relative sensitivity 1.49% K-1. These show great potential for applications detection. Through density functional theory electron localization function analysis, multimodal CaYGaO4: Eu3+/Er3+ studied. ion doping leads a decrease band gap induces Jahn-Teller effect, creating lower energy channels accelerate carrier release enhance performance. This is fundamental reason realization human motion Subsequently, novel sensing device detection developed high performance phosphor. properties demonstrated static-dynamic applications. Finally, it stability wide defect states provide new approach sensors, detection, information storage, anticounterfeiting.

Language: Английский

---