最新刊期
卷 47 ， 期 5 ， 2026
- 摘要：Visualization-enabled monitoring under extreme pressure requires luminescent systems that can directly convert pressure variations into a readable and quantifiable spectral shift or color change. Organic luminophores are intrinsically sensitive to molecular packing and the local microenvironment， offering strong potential for pressure-induced color tuning， yet their high-pressure applications are often limited by solid-state aggregation-caused quenching and insufficient stability. Here， anthracene （An） was employed as the emissive unit and confined via an interlayer-intercalation strategy within organo-modified montmorillonite to form An-based composites. As the intercalation ratio increases from 2∶1 to 1∶12， the （001） reflection continuously shifts to lower angles with an expanded basal spacing， indicating effective intercalation and homogeneous dispersion of An， accompanied by a pronounced enhancement in solid-state emission； the confined and hydrophobic interlayer environment further prolongs the emission lifetime. In situ diamond anvil cell measurements show that the 1∶12 composite exhibits a continuous red shift of the emission maximum with a visible color evolution from bluish-violet to yellow upon compression. A strong linear relationship between peak position and pressure is obtained over 1.60-10.1 GPa （R2=0.996）， with partial reversibility during decompression. These results demonstrate that interlayer confinement can simultaneously unlock the piezochromic advantages of organic emitters while suppressing solid-state quenching， providing an effective route toward visualization-enabled fluorescent manometry materials.关键词：Anthracene;organic-inorganic composite materials;pressure sensing2481|956|0更新时间：2026-05-21
Cover Story
- 摘要：Plastic scintillators have been extensively used in the field of radiation detection due to their low cost， good environmental stability， and simple large-scale preparation. Common plastic scintillators generally have insufficient detection efficiency due to their low effective atomic number， which limits their further application in high energy radiation and other fields. There are various methods to introduce materials with high effective atomic number into plastic scintillators. Among them， organic heavy metal compounds， due to their partial properties as organic compounds， can dissolve in polymer matrices， providing a more effective way for plastic scintillators to improve radiation stopping power and detection efficiency. In this work， tris（2，4-pentanedionato）indium（Ⅲ） （In（acac）3） was selected as a dopant， plastic scintillators doped with different concentrations of In（acac）3 were successfully prepared for the first time， and the changes in optical and scintillation properties of plastic scintillators with different doping concentrations were systematically studied. As the doping concentration increases， the effective atomic number and absorption coefficient of the plastic scintillator gradually increase， while the light yield progressively decreases. Among them， mass fraction 3% In（acac）3 doped plastic scintillator achieves an optimal balance between light yield and detection efficiency， resulting in an enhanced gamma count rate.关键词：plastic scintillators;indium compounds;optical properties;scintillation properties1944|647|0更新时间：2026-05-21
Invited Paper
- 摘要：This research， in response to the urgent demand for high-performance near-infrared （NIR） light sources in fields such as tunnel lighting， has successfully developed a BaMg1.072Al9.928O17∶Eu （BMAO∶Eu） NIR phosphor with excellent luminous efficiency and thermal stability， aiming to provide a new material solution for the construction of night vision compatible intelligent lighting systems. BaMg1.072Al9.928O17 （BMAO） has been synthesized by high-temperature solid-state sintering. The material exhibits a NIR emission at 780 nm with an internal quantum efficiency of 55.7%. The NIR emission originated from oxygen vacancy （
- 摘要：The development of compact light sources is urgently required for portable near-infrared （NIR） spectrometers. In this context， phosphor-converted light-emitting diodes （pc-LEDs） show great promise. Among various candidates， Cr3+-activated NIR phosphors are considered highly competitive due to their high efficiency and tunable emission. However， most reported Cr3+-activated NIR phosphors suffer from a narrow full width at half maximum （FWHM<150 nm） and a short emission wavelength （λem<750 nm）. In this work， a novel garnet-type NIR phosphor， Na2Lu2Ga4GeO12∶Cr3+ （NLGG∶Cr3+）， was designed and synthesized via a ［Na+-Ge4+］ co-substitution strategy. Under 468 nm blue light excitation， the optimized NLGG∶0.08Cr3+ sample exhibits a broadband emission covering 600-1 100 nm with a peak at 780 nm and a FWHM of 196 nm， achieving an internal quantum efficiency （IQE） of 56% and an external quantum efficiency （EQE） of 22%. Spectral analysis and crystal field calculations confirm that the broadband emission originates from Cr3+ ions occupying a single type of Ga3+ site with an intermediate crystal field strength. The emission peak can be continuously tuned from 742 nm to 790 nm， accompanied by a broadening of the FWHM from 182 nm to 196 nm， by varying the Cr3+ doping concentration. Finally， an NIR pc-LED device fabricated with this phosphor and a blue LED chip demonstrates its potential applications in biomedical imaging， night vision， and non-destructive testing.关键词：Near-infrared phosphor;broadband emission;Cr3+ doping;NIR pc-LED2057|544|0更新时间：2026-05-21
- 摘要：The instability in performance testing of large-area perovskite solar cell modules originates from the metastable state of internal interfacial charge distribution and transport. This study proposes the use of forward bias voltage as an electrical activation method to regulate this metastability， and reveals its spatially heterogeneous evolution mechanism through in-situ electroluminescence imaging. It is found that applying a 10 V bias enables rapid and stable activation within 30 min（efficiency recovery to 99%）. The underlying mechanism is the optimization of charge extraction and reduction of series resistance， which simultaneously enhances the fill factor and open-circuit voltage， and significantly improves the spatial uniformity of module luminescence. However， excessive bias voltage （≥12.5 V） induces localized heating accumulation， leading to irreversible quenching damage in the perovskite material or interfaces， manifested as dark spots originating from the positive electrode side in electroluminescence images. Starting from the coupled relationship of photogeneration， recombination， and transport of charge carriers， this research clarifies the optimization pathway and failure threshold of electrical activation， providing a solution with both theoretical and practical value for reliable testing and performance regulation of perovskite modules.关键词：Perovskite solar modules;Electrical activation;electroluminescence;temperature effect;Performance stability1235|356|0更新时间：2026-05-21
- 摘要：This paper reports a lattice-matched InAlAs/InGaAs/InP quantum cascade laser based on a dual-upper-state diagonal transition active region design. The device operates in the very-long-wave infrared band （λ≥14 μm）， achieving not only high output power but also stable performance under high-duty-cycle conditions. In pulsed mode， the device delivers a maximum peak power of 1.5 W and a single-facet average power of 90 mW. Furthermore， to extend its spectral performance， an external-cavity tuning configuration was implemented， enabling continuous wavelength tuning from 13.18 μm to 14.03 μm with a maximum average power of 3.43 mW across this range. These results demonstrate that the laser exhibits significant potential for multi-component gas sensing applications within the very-long-wave infrared spectral region.关键词：quantum cascade lasers;very-long-wave infrared;dual-upper-state;diagonal transition;wide tuning;high-power1104|388|0更新时间：2026-05-21
Editor's Choice
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Reflectivity Enhancement and Mechanism of AlGaN-based Nanoporous Distributed Bragg Reflector 增强出版 AI导读
摘要：High-reflectivity AlGaN-based nanoporous distributed Bragg reflectors （DBRs） are ideal candidates for constructing high-quality resonant cavities in ultraviolet resonant-cavity light-emitting diodes （RCLEDs） and vertical-cavity surface-emitting lasers （VCSELs）. The 20.5 pairs n/n+-Al0.6Ga0.4N epitaxial stack structure was prepared on c-plane sapphire substrate using metal-organic chemical vapor deposition （MOCVD）. The influence of the Si doping strategy in the n+-Al0.6Ga0.4N layers and the electrochemical etching voltages on the morphology and the reflection spectra of the nanoporous DBRs were systematically discussed. Compared with the conventional fixed Si doping concentration， the graded Si doping with an increasing concentration profile can mitigate the electrochemical etching rate variation among n+-Al0.6Ga0.4N layers， significantly improve the uniformity of the pore diameter and porosity of the nanoporous channels， thus enhance the reflectivity of the nanoporous DBR. With an optimized electrochemical etching voltage of 33 V， the Al0.6Ga0.4N nanoporous DBR achieved a reflectivity of 93.7% at the target wavelength of 310 nm with a stopband width of 36 nm. The photoluminescence intensity was increased by 110% for the multiple quantum wells deposited on the nanoporous DBR. These results would provide important reference for developing electrically injected ultraviolet RCLED and VCSEL devices.关键词：AlGaN-based Distributed Bragg Reflector;electrochemical etching;graded doping;porosity;reflectance spectrum;stopband width1288|490|0更新时间：2026-05-21 -
Upconversion Luminescence Properties of Er3+/Yb3+ Co-doped Y2MoO6 and Judd-Ofelt Theory Calculation 增强出版 AI导读
摘要：A series of Y2MoO6∶0.01Er3+/xYb3+ upconversion phosphors with different concentrations of Yb3+ ions （0.01， 0.03， 0.05， 0.07， 0.09， 0.11） were prepared by high-temperature solid-state method. The luminescence properties were investigated and calculated by X-ray diffraction （XRD）， scanning electron microscopy （SEM）， fluorescence emission spectra， fluorescence decay curves and Judd-Ofelt theory calculation. The experimental results show that Y2MoO6∶0.01Er3+/xYb3+ belongs to monoclinic phase， the sample purity is high， and the doped ions do not change the matrix structure. Under the excitation wavelength of 980 nm， the spectral emission intensity first increases and then decreases with the increase of Yb3+ ion content. When the doping amount reaches 0.09， the spectral emission intensity reaches the maximum， and the sample emits green light， followed by concentration quenching. According to Dexter energy transfer theory， the dominant factor of concentration quenching is the electric dipole-electric dipole interaction. Green light emission occurs between 520-570 nm， with energy level transitions of Er3+： 2H11/2→4I15/2 and4S3/2→4I15/2. Red light emission occurs between 650-680 nm， with energy level transitions of Er3+： 4F9/2→4I15/2. Both green and red light emissions belong to two-photon processes. The J-O theory was used to calculate the spectral parameters， and it was found that the Ω2 values were 0.16×10-20 cm2， 0.28×10-20 cm2， 0.38×10-20 cm2， 0.39×10-20 cm2， 0.56×10-20 cm2 and 0.42×10-20 cm2， respectively， with the highest value at x=0.09. This is mainly due to the lowest local symmetry of the luminescent system at this time， which leads to an increase in orbital overlap and makes the electron transition between energy levels easier， promoting the upconversion luminescence process.关键词：Er3+/Yb3+ co-doping;upconversion luminescence;energy transfer;Judd-Ofelt theory1234|620|0更新时间：2026-05-21 - 摘要：Due to its significant anisotropy and open interlayer gaps， the layered host structure offers greater potential for the luminescence modification of rare-earth ions. In this paper， K+ ion-doped Bi2ErO4Cl layered phosphors were prepared by a high-temperature solid-state method， and the effects of K+ doping on the crystal structure， upconversion luminescence， and temperature sensing properties were systematically investigated. The results indicate that K+ ions preferentially occupy the interlayer gap positions of the host， thereby inducing a unique anisotropic lattice distortion characterized by “lateral expansion-longitudinal compression，” which further reduces the local symmetry of the Er3+ ions.Under excitation of 980 nm laser， the fluorescence lifetime of the 4F9/2→4I15/2 transition of Er3+ was extended upon K+ doping， and its intensity was enhanced three times by doping K+ ions（mole fraction 3%）. Based on the fluorescence intensity ratio temperature measurement technique， the material exhibited excellent temperature sensing performance and thermal cycling stability， with absolute sensitivity （SA） and relative sensitivity （SR） reaching 0.19%·K-1 and 0.48%·K-1， respectively. The research results indicate that large ion radius K+ can achieve lattice distortion and local crystal field regulation of layered matrices through interstitial doping， providing new ideas for the development of high-performance upconversion optical temperature sensing materials.关键词：K+ doping;Bi2ErO4Cl;upconversion luminescence;temperature sensing1310|448|0更新时间：2026-05-21
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High-gain Spectral Properties of Erbium-doped Calcium Borosilicate Laser Glass at C-band Wavelengths 增强出版 AI导读
摘要：Aiming at the bottleneck of low gain and narrow bandwidth of traditional erbium-doped laser glasses in the C-band （1 530-1 565 nm） for optical communication， we designed erbium-doped calcium borosilicate （Er∶CBS） laser glasses with Er³⁺ doping atom fraction ranging from 2.26% to 10.55% by adopting high-temperature melting-quenching-annealing combined method. Through characterization techniques including X-ray diffraction （XRD）， Raman spectroscopy， ultraviolet/visible/near-infrared （UV/Vis/NIR） absorption spectroscopy and steady-state/transient fluorescence spectroscopy， the regulation laws of Er3+ doping concentration on the glass’s microstructure and spectral properties were investigated. The results show that all Er∶CBS glasses maintain a stable amorphous structure. The maximum phonon energy of 2.26% Er∶CBS is 1 067 cm-1， while that of 4.44%-10.55% Er∶CBS glass is 816 cm-1， both lower than that of phosphate glass （1 200-1 350 cm-1）. As the Er3+ doping concentration increases from 2.26% to 10.55%， the emission cross-section of Er∶CBS glass near 1 535 nm increases from 4.44×10-20 cm2 to 6.32×10-20 cm2， the full width at half maximum （FWHM） of fluorescence rises from 50 nm to 70 nm， and the gain bandwidth （σₑₘ·FWHM） increases from 222×10-20 cm2·nm to 442×10-20 cm2·nm. Although the fluorescence lifetime decreases from 1.17 ms to 0.62 ms， the figure of merit （σₑₘ·τ） remains in the range of （3.92-5.19）×10-20 cm2·ms. These findings indicate that Er∶CBS laser glasses with Er3+ doping concentrations of 2.26%- 10.55% is potential in the field of C-band power amplification.关键词：laser glass;Erbium ion （Er3+）;Calcium borosilicate glass;Emission cross section;Gain bandwidth;fluorescence lifetime1141|705|0更新时间：2026-05-21 - 摘要：This work reports a high-power flat mid-infrared supercontinuum laser system based on a large-mode-area low-loss fluorotellurite fiber cascades with a large-mode-area chalcogenide fiber. To effectively extend the spectral coverage of mid-infrared supercontinuum and improve its flatness， a novel high peak power Raman-soliton femtosecond laser source is used as the pump. Through cascading with the large-mode-area As₂S₃ fiber， the output power of the supercontinuum can reach 2 W at the maximum input power， with the spectral edge extending to 5.3 µm and the 10 dB spectral bandwidth covering the range of 2-4.6 µm. The proposed supercontinuum generation system， which utilizes fluorotellurite fiber as the transition fiber cascades with chalcogenide fiber， achieved higher supercontinuum output power in the mid and long wave infrared region compared to other previously reported schemes. This work provides a superior approach for realizing highly stable mid and long wave supercontinuum laser sources in the future.关键词：supercontinuum;high-power;chalcogenide fiber;cascade system1308|554|0更新时间：2026-05-21
Synthesis and Properties of Materials
- 摘要：This study introduces ethylene glycol （EG） as an alternative subphase to water in the Langmuir‑Blodgett （LB） technique for fabricating high‑quality quantum dot （QD） films， aiming to overcome the limitations of conventional aqueous‑phase LB processes， such as QD degradation and increased device leakage current. By optimizing LB deposition parameters， a uniform and densely packed monolayer QD film was achieved and employed as the emitting layer in red QLEDs. The use of an EG subphase effectively prevents water‑induced erosion of QDs， while the optimized LB film significantly suppresses leakage current. As a result， the device exhibits outstanding electroluminescence performance： red emission peaked at 630 nm with a narrow full width at half maximum of 22 nm， a maximum external quantum efficiency of 26.1%， and an operational lifetime （T95） of 3 272 h at an initial luminance of 1 000 cd·m-2， markedly surpassing both conventional aqueous‑phase LB devices and spin‑coated reference devices. These findings demonstrate that the EG subphase LB strategy， through the mitigation of interfacial defects and leakage pathways， offers a promising fabrication route toward high‑efficiency and long‑lifetime QLEDs.关键词：quantum-dot light-emitting diodes （QLEDs）;Langmuir-Blodgett technique;monolayer quantum dot1359|511|0更新时间：2026-05-21
- 摘要：In circularly polarized light-emitting diodes （CP-LEDs）， it has been difficult to obtain both a high luminescence dissymmetry factor （glum） and a high external quantum efficiency （EQE） simultaneously. This limitation stems from conventional approaches， which typically employ intrinsically chiral emitters or chiral charge-transport layers modifications that often degrade charge transport and radiative recombination within the device. To overcome these issues， we introduce a non-invasive and decoupled structural design. Here， a chiral optical microcavity （COM）- formed by a double-layer chiral liquid crystal （CLC） and a metal reflector-creates a macroscopic chiral photonic environment around an otherwise non-chiral， high-efficiency quantum dot light-emitting unit. Without modifying the emitter or the charge-injection interfaces， this configuration enables effective control over the circular polarization of the output light. The mechanism relies on the synergy between the selective reflection of the CLC and the mode resonance of the Fabry-Pérot microcavity. Inside the cavity， emitted light undergoes repeated chiral-selective interactions and mode-selective amplification， greatly enhancing the intensity difference between left- and right-handed components-far beyond what a simple chiral filter could achieve. Using this design， we fabricated a red CP-QLED that reaches a glum≈0.75 while maintaining a high EQE of 24.3% and a luminance of approximately 194 468 cd/m2 at 8 V. These results demonstrate a practical route to decoupling chiral function from emission efficiency through macroscopic photonic engineering. Overall， this work provides a scalable strategy that combines functional materials with tailored photonic structures for high-performance circularly polarized electroluminescence. It offers a useful reference for the development of future full-color CP-QLED displays and integrated optoelectronic systems.关键词：quantum dot light-emitting diodes;Chiral liquid crystals;Fabry-Pérot microcavity;circularly polarized light1393|466|0更新时间：2026-05-21
- 摘要：Quantum dot light-emitting diodes （QLEDs）， renowned for their high color purity， wide color gamut， and solution processability， are considered a pivotal technology for next-generation high-resolution displays. However， achieving high-resolution patterning without compromising the optical properties of quantum dots （QDs） remains a critical challenge hindering their practical application. Addressing this patterning bottleneck in high-resolution QLEDs fabrication， this work presents a novel patterning strategy based on nanoimprint lithography and thermally regulated transfer printing. The proposed method involves fabricating honeycomb microstructures on a polyvinyl butyral （PVB） surface using a silicon template， followed by selective filling of QDs controlled by solution wettability. Through a subsequent thermal-regulated transfer process， highly uniform QDs arrays with a feature size as small as 1.5 µm and a resolution of 9 072 pixels per inch （PPI） are successfully prepared. By employing higher-resolution templates， we have further achieved QDs array with a maximum pixel density of 25 400 PPI. Furthermore， we successfully fabricated high-resolution red QLEDs device （9 072 PPI） by integrating the QDs array onto hole transport layer （HTL）， achieving a maximum external quantum efficiency （EQE） of 10.91% and a peak luminance of 164 421 cd/m². This work provides a stable and reproducible patterning pathway for the fabrication of high-resolution QLEDs.关键词：quantum dot light-emitting diodes（QLEDs）;High-resolution;nanoimprint;thermal regulated transfer printing1374|466|0更新时间：2026-05-21
- 摘要：Perovskite solar cells （PSCs） have garnered significant attention for their high efficiency， but their commercial application is hindered by stability issues caused by defects such as uncoordinated Pb2+ ions and halide vacancies. This work introduces 3-amino-2，6-dichloropyridine （ADCP） as a novel pyridylamine additive for PSCs， aiming to enhance both device efficiency and stability. ADCP features a pyridine functional group that coordinates with Pb2+ ions and forms hydrogen bonds with halide ions， enabling dual-site passivation of defects. This dual interaction reduces Pb-related defects， improves crystallinity， and enhances charge transport within the perovskite layer. The devices exhibit a PCE of 25.59%， with significant improvements in long-term stability， maintaining 81% of the initial PCE for nearly 500 h. The study highlights the effectiveness of pyridylamine-driven passivation in overcoming stability issues and enhancing the overall performance of PSCs， providing a promising strategy for high-efficiency， stable perovskite photovoltaics.关键词：Perovskite solar cells;Hydrogen bonding;Pyridylamine1273|455|0更新时间：2026-05-21
Device Fabrication and Physics
- 摘要：In recent years， luminescence thermometry techniques have gained widespread favor among researchers in the field of non-contact temperature measurement， owing to their advantages such as excellent temperature resolution， spatial resolution， high environmental compatibility and rapid response. Among these， the luminescence thermometry based on luminescence intensity ratio （LIR） demonstrates significant application potential due to its superior interference resistance and inherent self-calibration characteristics. Thermally coupled levels （TCLs） have long served as the core physical mechanism for LIR thermometry， and exceptional universality and reliability have established TCLs as the prevailing approach in luminescence thermometry. However， an inherent constraint of this mechanism——the strong correlation between the energy gap ΔE and relative sensitivity （
- 摘要：To address the urgent demand for 730 nm far-red light sources with high power density， excellent beam quality， and precise spectral matching in precision agriculture and plant photobiology research， this study designs and fabricates a 730 nm high-power tapered laser with an adjustable taper angle （θ） ranging from 2° to 6°. Systematic characterization reveals that the taper angle critically influences device performance. A comprehensive figure of merit Q is defined to evaluate the trade-offs among output power， beam quality， and spectral width. At a taper angle of 3°， the device delivers over 360 mW of output power at 1.1 A under 20 ℃， with a beam quality factor M²<3 and a narrow spectral full width at half maximum （FWHM） of 0.5 nm. This work provides an essential device foundation and theoretical basis for the design of high-performance semiconductor lasers tailored for agricultural biophotonic applications.关键词：730 nm laser;tapered waveguide;GaAsP/AlGaInP;beam quality;Agricultural photobiology1188|388|0更新时间：2026-05-21
- 摘要：Vanillin is a common food flavoring agent. However， excessive intake may pose health risks to the human body. Therefore， it is urgent to establish efficient and sensitive detection methods. Using halloysite nanotubes as the carrier， fluorescent ionic liquid as the fluorescent group and functional monomer， a sensing material with specific recognition ability for vanillin was prepared by surface molecular imprinting technology. The successful synthesis of the sensing material was confirmed through scanning electron microscopy， Fourier transform infrared spectroscopy and X-ray diffraction. The fluorescence intensity of the sensing material at 333 nm decreased regularly with the increased concentration of vanillin， showing a good fluorescence response characteristic. The fluorescence intensity ratio （F0/F） of the material showed a good linear response with vanillin in the concentration range of 0-80 nmol·L-1. The detection limit was as low as 0.75 nmol·L-1. Furthermore， this material possessed excellent selectivity， anti-interference ability， reusability and stability. It had been successfully used in the detection of vanillin in actual samples. The sensing material developed in this paper provides a highly sensitive approach for the rapid detection of trace amounts of vanillin， which shows promising application prospects.关键词：Halloysite Nanotubes;ionic liquids;Molecularly Imprinted Polymers;Fluorescent sensing;Vanillin806|325|0更新时间：2026-05-21
Luminescence Applications and Interdisciplinary Fields
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