Sound, Force and Light Induced Emissions from Er-Mn Doped ZnS/CaZnOS Heterostructure for Remote Temperature Monitoring via Photo- and Mechanoluminescence.

Mechanoluminescence (ML) is a powerful phenomenon that enables light generation induced with mechanical or acoustic waves, and remote temperature sensing via luminescence thermometry techniques. In this work, the multi-functional, ML-active materials based on Er and Mn co-doped ZnS/CaZnOS heterostructure are developed for remote temperature monitoring and visual sensing of force and sound. The material exhibits characteristic photoluminescence (PL) under UV and NIR (up-conversion) excitation, with energy transfer from Er to Mn influencing the emission color.

Understanding the Limitations of Chloride Double Perovskites as Hosts for Stable Cr Luminescence.

Chloride double perovskite, a promising frontier for cutting-edge light-conversion research worldwide, is harnessed by incorporating transition-metal ions and advanced crystal engineering. Despite the significant progress in transition-metal-ion-doped chloride double perovskite, challenges such as insufficient thermal stability remain substantial barriers to their practical applications. Additionally, the quenching mechanisms in these materials are not fully understood.

Rational Design of Organic Manganese Halides for High Quantum Efficiency and Stability.

Organic manganese halides have gained attention as luminescent materials due to their characteristics, such as low toxicity, ease of synthesis, and high photoluminescence quantum yield (PLQY). This study challenges the common belief that increasing the Mn-Mn distance invariably boosts PLQY. It introduces a 3D diagram illustrating the importance of ground-state and excited-state band alignments in influencing PLQY.

Sharp-to-Broad Band Energy Transfer in Lithium Aluminate and Gallate Phosphors for SWIR LED.

Short-wave infrared (SWIR) phosphor-converted light-emitting diode (LED) technology holds promise for advancing broadband light sources. Despite the potential, limited research has delved into the energy transfer mechanism from sharp-line to broadband emission in SWIR phosphors, which remains underexplored. Herein, we demonstrate bright SWIR phosphors achieved through Cr/Ni energy transfer in LiGaAl O.

Numerical Simulation of Light to Heat Conversion by Plasmonic Nanoheaters.

Plasmonic nanoparticles are widely recognized as photothermal conversion agents, i.e., nanotransducers or nanoheaters.

Persistent Photoluminescence and Mechanoluminescence of a Highly Sensitive Pressure and Temperature Gauge in Combination with a 3D-Printable Optical Coding Platform.

Distinct types of luminescence that are activated by various stimuli in a single material offer exciting developmental opportunities for functional materials. A versatile sensing platform that exhibits photoluminescence (PL), persistent luminescence (PersL), and mechanoluminescence (ML) is introduced, which enables the sensitive detection of temperature, pressure, and force/stress. The developed SrMgSiO:Eu/Dy material exhibits a linear relationship between ML intensity and force and can be used as an ML stress sensor.

Methodology Approach for Microplastics Isolation from Samples Containing Sucrose.

The growing production and use of plastics significantly contribute to microplastics (MPs) contamination in the environment. Humans are exposed to MPs primarily through the gastrointestinal route, as these particles are present in beverages and food, e.g.

Supersensitive visual pressure sensor based on the exciton luminescence of a perovskite material.

Accurate, rapid, and remote detection of pressure, one of the fundamental physical parameters, is vital for scientific, industrial, and daily life purposes. However, due to the limited sensitivity of luminescent manometers, the optical pressure monitoring has been applied mainly in scientific studies. Here, we developed the first supersensitive optical pressure sensor based on the exciton-type luminescence of the Bi-doped, double perovskite material CsAgNaInCl.

Spinel-Type Structured Phosphor Near-Infrared-II Emission: Intervalence Charge Transfer and Hetero-Valent Chromium Pairs.

Near-infrared (NIR) emitting phosphors draw much attention because they show great applicability and development prospects in many fields. Herein, a series of inverse spinel-type structured LiGaO phosphors with a high concentration of Cr activators is reported with a dual emission band covering NIR-I and II regions. Except for strong ionic exchange interactions such as Cr-Cr and Cr clusters, an intervalence charge transfer (IVCT) process between aggregated Cr ion pairs is proposed as the mechanism for the ~1210 nm NIR-II emission.

Photoelectric Studies as the Key to Understanding the Nonradiative Processes in Chromium Activated NIR Materials.

In this study, we synthesized a series of GaInO:0.02Cr materials with varying values from 0.0 to 1.

Isolation and identification of microplastics in infant formulas - A potential health risk for children.

Microplastics (MPs) are plastic particles between 0.1 and 5,000 µm in size that can contaminate food. Unfortunately, to date, little attention has been paid to analyzing the presence of such particles in baby foods.

Advancing Near-Infrared Light Sources: Enhancing Chromium Emission through Cation Substitution in Ultra-Broadband Near-Infrared Phosphors.

The growing interest in the use of near-infrared (NIR) radiation for spectroscopy, optical communication, and medical applications spanning both NIR-I (700-900 nm) and NIR-II (900-1700 nm) has driven the need for new NIR light sources. NIR phosphor-converted light-emitting diodes (pc-LEDs) are expected to replace traditional lamps mainly due to their high efficiency and compact design. Broadband NIR phosphors activated by Cr and Cr have attracted significant research interest, offering emission across a wide range from 700 to 1700 nm.

Hidden Hexavalent Chromium Ions with Subtle Structural Evolution in Near-Infrared Phosphors.

Cr-doped inorganic materials are pivotal in developing near-infrared optical materials; however, multivalent Cr ions and their respective distribution in the materials remain ambiguous. Herein, a series of Li(ScIn)O:Cr phosphors containing both Cr/Cr ions are prepared. High-resolution synchrotron X-ray diffraction (XRD) reveals two similar phases in Li(ScIn)O.

Uncovering the origin of radiationless losses in CuLaO by rationalizing the action of temperature and pressure on luminescence.

CuLaO is a rare-earth and dopant-free inorganic compound able to emit green light upon blue excitation. Its absorption amounts to 90% but its internal quantum efficiency is poor (<17%). The origin of this deleterious radiationless behavior is addressed by investigating the spectroscopic properties of this compound under the action of temperature and hydrostatic pressure in the 15-400 K and 1 bar-40 kbar intervals, and by combining the spectroscopic data with earlier results of DFT calculations.

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D-Printed Polymers.

Endowing a single material with various types of luminescence, that is, exhibiting a simultaneous optical response to different stimuli, is vital in various fields. A photoluminescence (PL)- and mechanoluminescence (ML)-based multifunctional sensing platform is built by combining heterojunctioned ZnS/CaZnOS:Mn mechano-photonic materials using a 3D-printing technique and fiber spinning. ML-active particles are embedded in micrometer-sized cellulose fibers for flexible optical devices capable of emitting light driven by mechanical force.

Single Crystalline Films of Ce-Doped YMgSiAlO Garnets: Crystallization, Optical, and Photocurrent Properties.

This research focuses on LPE growth, and the examination of the optical and photovoltaic properties of single crystalline film (SCF) phosphors based on Ce-doped YMgSiAlO garnets with Mg and Si contents in x = 0-0.345 and y = 0-0.31 ranges.

Enhancement of self-trapped excitons and near-infrared emission in Bi/Er co-doped CsAgNaInCl double perovskite.

Erbium (Er) complexes are used as optical gain materials for signal generation in the telecom C-band at 1540 nm, but they need a sensitizer to enhance absorption. Na substitution for Ag and Bi doping at the In site is a possible strategy to enhance the broadband emission of CsAgInCl, which could be used as a sensitizer for energy transfer to rare-earth elements. Herein, self-trapped exciton (STE) energy transfer to Er at 1540 nm in double perovskite is reported.

Dual role of oxygen-related defects in the luminescence kinetics of AlN:Mn.

This study presents the impact of temperature and pressure on AlN:Mn luminescence kinetics. Unusual behavior of Mn optical properties during UV excitation is observed, where a strong afterglow luminescence of Mn occurs even at low temperatures. When the temperature increases, the contribution of the afterglow luminescence is further enhanced, causing a significant increase in the luminescence intensity.

Effect of Temperature and Pressure on Structural and Optical Properties of Organic-Inorganic Hybrid Manganese Halides.

Organic-inorganic hybrid metal halides have recently attracted attention in the global research field for their bright light emission, tunable photoluminescence wavelength, and convenient synthesis method. This study reports the detailed properties of (CHN)MnBr, which emits bright green light with a high photoluminescence quantum yield. Results of powder X-ray diffraction, photoluminescence, thermogravimetric analysis, and Raman spectra show the phase transition of (CHN)MnBr at 430 K.

Photoluminescence enhancement study in a Bi-doped CsAgInCl double perovskite by pressure and temperature-dependent self-trapped exciton emission.

Here, we report a halide precursor acid precipitation method to synthesize CsAgInBiCl ( = 0, 0.02, 0.04, 0.

Chromium Ion Pair Luminescence: A Strategy in Broadband Near-Infrared Light-Emitting Diode Design.

Portable near-infrared (NIR) light sources are in high demand for applications in spectroscopy, night vision, bioimaging, and many others. Typical phosphor designs feature isolated Cr ion centers, and it is challenging to design broadband NIR phosphors based on Cr-Cr pairs. Here, we explore the solid-solution series SrAlGaO:0.

Formation and Near-Infrared Emission of CsPbI Nanoparticles Embedded in CsPbI Crystals.

CsPbI, as a rarely investigated member of the CsPbX (X is a halogen element) family, has been successfully synthesized at low temperatures, and the synthetic conditions have been optimized. Metal iodides such as LiI, KI, NiI, CoI, and ZnI, as additives, play an important role in enhancing the formation of the CsPbI microcrystals. ZnI with the lowest dissociation energy is the most efficient additive to supply iodide ions, and its amount of addition has also been optimized.

Multi-Site Cation Control of Ultra-Broadband Near-Infrared Phosphors for Application in Light-Emitting Diodes.

Near-infrared (NIR) phosphors are fascinating materials that have numerous applications in diverse fields. In this study, a series of LaGaGeO:Cr phosphors, which was incorporated with Sn, Ba, and Sc, was successfully synthesized using solid-state reaction to explore every cationic site comprehensively. The crystal structures were well resolved by combining synchrotron X-ray diffraction and neutron powder diffraction through joint Rietveld refinements.

Efficient Luminescence from CsPbBr Nanoparticles Embedded in CsPbBr.

CsPbBr is regarded as an outstanding luminescent material with good thermal stability and optical performance. However, the mechanism of green emission from CsPbBr has been controversial. Here we show that isolated CsPbBr nanoparticles embedded within a CsPbBr matrix give rise to a "normal" green luminescence while superfluorescence at longer wavelengths is suppressed.

Broadband NaKLi[LiSiO]:Ce Alkali Lithosilicate Blue Phosphors.

Phosphors with a rigid and symmetrical structure are urgently needed. The alkali lithosilicate family (A[LiSiO]) has been extensively studied with a narrow emission band due to its unique cuboid-coordinated environment and rigid structure. However, here we demonstrate for the first time Ce-doped NaKLi[LiSiO] phosphors with a broad emission band, a high internal quantum efficiency (85.