NIR Mechanoluminescence from Cr3+ Activated Y3Al5O12 with Intense Zero Photon line

Article Engineering, Environmental

Temperature invariant ratiometric luminescence manometer based on Cr3+ions emission

M. Szymczak et al.

Summary: This paper proposes a novel luminescent manometer that utilizes the spectral shift of Cr3+ ions in a specific material to measure pressure, and demonstrates its performance under different pressure ranges and temperature changes.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Chemistry, Physical

Structural Rigidity Control toward Cr3+-Based Broadband Near-Infrared Luminescence with Enhanced Thermal Stability

Gaochao Liu et al.

Summary: In this study, broadband NIR phosphors were designed and optimized through chemical substitution to enhance thermal stability and quantum efficiency. The as-fabricated phosphor-in-glass-based NIR LED light source showed potential in alcohol concentration detection. This research provides a design principle for exploring NIR phosphors with improved thermal stability and will stimulate further material discovery and quantitative analysis research in NIR spectroscopy.

CHEMISTRY OF MATERIALS (2022)

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Article Optics

Design of Ratiometric Dual-Emitting Mechanoluminescence: Lanthanide/Transition-Metal Combination Strategy

Su Zhou et al.

Summary: This work proposes a ratiometric dual-emitting mechanoluminescence (ML) strategy to achieve stress-sensitive ML color variation. The combination of Lanthanide/transition-metal is used to construct the dual-activator ML system. The difference in electronic configuration between Lanthanide and transition-metal ions plays a key role in the response of corresponding luminescence kinetics to stress-induced local crystal field environment changes.

LASER & PHOTONICS REVIEWS (2022)

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Article Chemistry, Physical

Dopant and Compositional Modulation Triggered Broadband and Tunable Near-Infrared Emission in Cs2Ag1-XNaXInCl6:Cr3+ Nanocrystals

Anran Zhang et al.

Summary: Lead-free halide perovskite nanocrystals have the potential for broadband near-infrared emission in optoelectronic applications, and tunable emission is achieved by gradually substituting silver ions with sodium ions. A nanocrystal film fabricated by screen printing shows promise in high-resolution imaging and NIR fluorescent labeling.

CHEMISTRY OF MATERIALS (2022)

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Article Optics

Rapid Nondestructive Detection Enabled by an Ultra-Broadband NIR pc-LED

Hao Suo et al.

Summary: This study reports a novel double-perovskite phosphor La2MgHfO6:Cr3+/Yb3+ that exhibits ultra-broadband NIR emissions and remarkable luminescence properties. By controlling energy transfer process, the quantum efficiency and thermal stability of emissions are substantially improved. The phosphors are further integrated into a miniaturized NIR LED package, demonstrating superior performance.

LASER & PHOTONICS REVIEWS (2022)

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Article Chemistry, Physical

Contact electrification induced mechanoluminescence

Wenxiang Wang et al.

Summary: Mechanoluminescence (ML) is a luminescence response to mechanical stimuli with significant applications. This study reveals that ML in centrosymmetric elastomers is essentially induced by contact electrification. Contact electrification creates a broadband excitation energy, which directly excites luminescence levels to emit ML. These findings also provide new insight into the piezoluminescence mechanism in materials like SrAl2O4: Eu2+ and ZnS: Cu/Mn2+.

NANO ENERGY (2022)

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Article Nanoscience & Nanotechnology

Improving the Sensitivity of the Mechanoluminescence Composite through Functionalization for Structural Health Monitoring

Hyunggwi Song et al.

Summary: In recent years, considerable effort has been put into the development and improvement of mechanoluminescence (ML)-based stress sensing as a nondestructive inspection technique. This study presents a novel approach to increase the sensitivity of ML composites made of an epoxy resin matrix and functionalized SrAl2O4:Eu2+, Dy3+ particles. The results show that surface modification of ML particles can enhance the sensitivity and introduce new chemical bonds, leading to a larger stress transfer through interfacial bonding.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Multidisciplinary

Visualizing Dynamic Mechanical Actions with High Sensitivity and High Resolution by Near-Distance Mechanoluminescence Imaging

Yixi Zhuang et al.

Summary: Proportionally converting mechanical energy into photons through mechanoluminescent technology opens up new possibilities for high-resolution stress visualization and fast response. This study develops a novel stress distribution sensor with significantly enhanced detection sensitivity by combining a proposed near-distance mechanoluminescent imaging scheme and an improved mechano-to-photon convertor.

ADVANCED MATERIALS (2022)

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Review Chemistry, Multidisciplinary

Fluorescent Nanoparticles for Super-Resolution Imaging

Wei Li et al.

Summary: Super-resolution imaging techniques have become popular for visualizing cellular structures with nanometric resolution. This review focuses on the use of fluorescent nanoparticles (NPs) as bright and photostable probes for super-resolution imaging. The review provides an overview of different super-resolution methods, discusses their demands on the properties of fluorescent NPs, and reviews the features, strengths, and weaknesses of each NP class. The future outlook and opportunities in material science for the development of probes for multiplexed subcellular imaging with nanometric resolution are also discussed.

CHEMICAL REVIEWS (2022)

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Article Chemistry, Physical

Programming mechanoluminescent behaviors of 3D printed cellular structures

Jiayu Zhao et al.

Summary: In this study, we developed a strategy to fabricate mechanically luminescent elastomers with complex geometries and periodic cellular structures, and demonstrated programmable luminescent behaviors of different cellular structures. Furthermore, we investigated the relationship between structure, stress, and luminescence, providing fundamental knowledge for the design of next-generation stress sensors and wearable devices based on mechanoluminescence.

NANO ENERGY (2022)

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Review Optics

Advances in Chromium-Activated Phosphors for Near-Infrared Light Sources

Fangyi Zhao et al.

Summary: This review discusses the effect of crystal field on the luminescence of Cr3+/Cr4+ and outlines the research progress of Cr3+/Cr4+-doped NIR luminescent materials. It summarizes the luminescence properties of these materials and lists strategies for tuning emission wavelength, broadening emission band, enhancing NIR luminescence efficiency, and improving thermal stability. Finally, it presents the current challenges and future prospects in the research of Cr3+/Cr4+-doped NIR luminescent materials.

LASER & PHOTONICS REVIEWS (2022)

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Article Chemistry, Multidisciplinary

Ultrasound-Induced Mechanoluminescence and Optical Thermometry Toward Stimulus-Responsive Materials with Simultaneous Trigger Response and Read-Out Functions

Yicong Ding et al.

Summary: The ultrasound-induced mechanoluminescence (USML) of Erbium-doped CaZnOS is reported in this study. The fluorescence intensity ratio of Er3+'s transitions allows for simultaneous temperature mapping with high sensitivity. The combination of USML, local heating, and remote read-out enables highly controlled stimulation with independent control of light emission and ultrasonic heating.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Highly Efficient Broadband Near-Infrared Luminescence with Zero- Thermal-Quenching in Garnet Y3In2Ga3O12:Cr3+ Phosphors

Chaojie Li et al.

Summary: A novel Cr3+-doped garnet phosphor Y3In2Ga3O12:Cr3+ is discovered, which can emit broadband NIR light upon 450 nm excitation. This material exhibits high efficiency and thermal stability, and the NIR pc-LED device fabricated using it shows better performance than devices made from other reported NIR materials.

CHEMISTRY OF MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Self-Activated Tungstate Phosphor for Near-Infrared Light-Emitting Diodes

Sheng Wu et al.

Summary: In this study, a self-activated far-red to NIR emitting NaLaMgWO6 phosphor was prepared and its luminescence properties were investigated. By introducing Bi3+ ions as sensitizers, the emission intensity of the phosphor was enhanced, resulting in improved internal quantum efficiency and thermal stability. The resulting NIR pc-LED devices showed satisfactory performance in night vision detection and other practical applications.

ADVANCED OPTICAL MATERIALS (2022)

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Article Engineering, Electrical & Electronic

An interactive mouthguard based on mechanoluminescence-powered optical fibre sensors for bite-controlled device operation

Bo Hou et al.

Summary: This technology uses mechanoluminescent phosphors, distributed-optical-fibre sensors, and machine learning algorithms to translate different biting patterns into inputs that can control other devices. By using mouthguards, it enables individuals with dexterity impairments or neurological conditions to operate computers, smartphones, and wheelchairs without the need for fingers or eye movements.

NATURE ELECTRONICS (2022)

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Review Chemistry, Multidisciplinary

The optical research progress of nanophosphors composed of transition elements in the fourth period of near-infrared windows I and II for deep-tissue theranostics

Ming-Hsien Chan et al.

Summary: Research in the field of nano-optics is rapidly advancing, particularly in the area of near-infrared (NIR) light optics. NIR light, with its longer wavelength, offers the advantage of avoiding interference from biological tissues, making it highly valuable for human treatment applications. This review focuses on the absorption, reflection/luminescence interactions between NIR light and biological tissues, analyzing the NIR optical properties of transition elements and exploring the possibilities for non-invasive precision medicine in the future.

NANOSCALE (2022)

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Article Chemistry, Inorganic & Nuclear

Crystallographic control for Cr4+ activators toward efficient NIR-II luminescence

Hao Zhou et al.

Summary: In this study, a broadband near-infrared-II phosphor Li2ZnGeO4:Cr4+ was successfully synthesized. The phosphor shows wide absorption and broadband near-infrared-II emission characteristics. By crystallographic control, all the Cr ions in the phosphor are stabilized in the tetravalent state, demonstrating its potential applications in non-destructive examination and bioimaging.

INORGANIC CHEMISTRY FRONTIERS (2022)

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Article Materials Science, Multidisciplinary

Optical spectroscopy of the Sr4Al14O25:Mn4+,Cr3+ phosphor: pressure and temperature dependences

Enrique Jara et al.

Summary: This study presents a spectroscopic investigation of doubly Mn4+ and Cr3+-doped Sr4Al14O25 to evaluate its potential as a red emitting phosphor. The results show that Sr4Al14O25 exhibits a ruby-like emission due to the strong crystal field effect of Cr3+. The photoluminescence and excitation spectra of Sr4Al14O25:Mn4+,Cr3+ reveal a non-centrosymmetric distorted Al4 site in the crystal structure. Additionally, the study highlights the effects of pressure and temperature on the photoluminescence intensity and lifetime of the material.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Chemistry, Multidisciplinary

Effective Repeatable Mechanoluminescence in Heterostructured Li1-xNaxNbO3: Pr3+

Xiuxia Yang et al.

Summary: Mechanoluminescence (ML) is achieved through mechanical to optical energy conversion. The synthesis of Li0.5Na0.5NbO3: Pr3+ effectively couples trap structures and piezoelectric property to realize highly repeatable ML performance without traditional preirradiation process. Doping of Na+ ions in LiNbO3 optimizes trap distributions and concentrations, improving electron transfer efficiency to promote ML performances.

SMALL (2021)

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Article Chemistry, Multidisciplinary

Achieving Remote Stress and Temperature Dual-Modal Imaging by Double-Lanthanide-Activated Mechanoluminescent Materials

Changjian Chen et al.

Summary: This study presents a novel approach to remote stress-temperature dual-mode sensing, achieved by using a specific material that can read both stress and temperature within the same material. This new technology provides a convenient, reliable, and more sensitive way for developing human-machine interfaces, structural health monitoring, and biomedical engineering applications.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Physical

Stress-induced color manipulation of mechanoluminescent elastomer for visualized mechanics sensing

Birong Tian et al.

Summary: This study designed an efficient mechanoluminescent system that allowed for stress/strain-induced color manipulation, and developed a visualized semi-quantitative sensing technique for mechanics with high reliability and no need for complicated monitoring equipment.

NANO ENERGY (2021)

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Article Physics, Applied

Effect of Ca2+-Si4+ on Y3Al5O12:Ce ceramic phosphors for white laser-diodes lighting

Hui Ding et al.

Summary: The addition of CaCO3 and SiO2 significantly reduces the sintering temperature of YAG:1.5%Ce+xCS ceramic phosphors. The presence of Ca2+ - Si4+ in YAG:Ce CPs affects their luminescent properties and microstructures, with Ca2Al2SiO7 being identified. The performance of these CPs in high-power white laser diodes lighting was characterized through XRD, photoluminescence, and cathodoluminescence spectra analysis.

APPLIED PHYSICS LETTERS (2021)

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Article Chemistry, Physical

Synthesis and mechanoluminescent properties of submicro-sized Y3Al5O12:Ce3+ particles

Jiazhi Li et al.

Summary: In this study, submicro-sized Y3Al5O12:Ce3+ particles were synthesized via a coprecipitation method and showed intense greenish-yellow mechanoluminescence under mechanical stimuli, displaying trap-dependent behavior. The distinct spectral characteristics between photoluminescence and mechanoluminescence suggested the generation of distorted Ce3+ sites under mechanical stimuli, revealing the mechanoluminescent mechanisms of the submicro-sized Y3Al5O12:Ce3+.

CHEMICAL PHYSICS LETTERS (2021)

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Article Automation & Control Systems

Self-Powered Stretchable Mechanoluminescent Optical Fiber Strain Sensor

Haohua Liang et al.

Summary: The self-powered stretchable strain sensor proposed in this study integrates mechanoluminescent phosphors with an elastomer optical fiber to emit light driven by external strain without the need for external power. It exhibits high accuracy and durability, with potential applications in a variety of scenarios, making it a promising technology for future self-powered optical sensor systems.

ADVANCED INTELLIGENT SYSTEMS (2021)

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Article Materials Science, Multidisciplinary

Tuning luminescence from NIR-I to NIR-II in Cr3+-doped olivine phosphors for nondestructive analysis

Hao Cai et al.

Summary: By engineering the crystallographic site, Cr3+-doped olivine phosphors can achieve tunable luminescence from NIR-I to NIR II. The luminescence wavelength can be adjusted from 940 nm to 1110 nm, with the corresponding FWHM modified from 236 to approximately 300 nm. These phosphors have potential applications as non-destructive light sources for food analysis.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Chemistry, Multidisciplinary