最新刊期
卷 47 ， 期 7 ， 2026
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Preparation and Luminescence Properties of Self-crystallized BaF2∶Pr3+,Gd3+,Ce3+ Glass-ceramics 增强出版 AI导读
摘要：Rare earth doped oxyfluoride glass-ceramic （GC）， due to its unique structure and luminescent properties， has shown broad application prospects in multiple fields such as stereoscopic display， fiber laser， laser lighting， near-infrared （NIR） light sources， etc. In this paper， a series of self-crystallized Pr3+/Gd3+/Ce3+ triply doped BaF2 transparent GCs were prepared by the high-temperature melting method. Phase purities， crystal structures， particle morphologies and size distribution of the prepared BaF2∶Pr3+，Gd3+，Ce3+ GC samples were systematically analyzed by X-ray diffractometer （XRD）， XRD Rietveld refinement and transmission electron microscopy， respectively. All results confirm that the BaF2 nanoparticles were formed via a self-crystallization process. Under excitation of 444 nm and 586 nm， the typical visible and NIR emissions of Pr3+ first enhance with increasing Gd3+ concentration to about 3%， and then decrease. This phenomenon is resulted from a significant regulatory effect of Gd3+ dopants on the Pr3+ luminescence. Besides， upon 320 nm excitation， Ce3+ dopants not only emit broadband ultraviolet （UV） emission at 370 nm， but effectively transfer energy to the 1D2 level of Pr3+， thereby inducing the characteristic emissions from Pr3+ 1D2→3H4 transition. Interestingly， the GC samples appear magenta color under illumination of blue light ~444 nm， while show purple color under illumination of UV ~320 nm. In practice， the patterns constructed on copper plates using the GC powders exhibit obvious color switching in connection with excitation lights， successfully verifying their applications in fluorescence anti-counterfeiting and information encryption.关键词：glass-ceramics;Pr3+;luminescence regulation;energy transfer;fluorescence anti-counterfeiting862|186|0更新时间：2026-07-23
Cover Story
- 摘要：Circularly polarized luminescent（CPL） materials， which integrate intrinsic optical chirality and highly efficient luminescence， represent a core class of next-generation functional materials for advanced optoelectronic applications. The development of helical polymer materials has injected renewed vitality into the CPL field. A central challenge remains the rational construction of helical polymers featuring both high luminescence efficiency and large dissymmetry factors. This review systematically summarizes synthetic strategies for CPL-active materials based on helical polymers. The promising applications of these CPL materials are further discussed. Finally， future perspectives and research directions in this dynamic field are proposed， aiming to provide theoretical guidance and advance the development of CPL materials.关键词：Polymers;Helices;chirality;circularly polarized luminescence;self-assembly428|684|0更新时间：2026-07-23
- 摘要：Heavy metal ions （Fe3+） and dichromate ions （Cr2O
Invited Paper
- 摘要：Quantum-dot superlattices exhibit collective optoelectronic properties originating from ordered interdot packing and enhanced interdot coupling， and are therefore considered a promising material platform for high-performance light-emitting devices. However， translating structurally coherent superlattices into device-compatible patterned thin films remains a key challenge for their application in high-resolution display technologies. Recently， Xu-yong Yang， Tae-Woo Lee， and Yuchen Wu et al. reported pixelated perovskite quantum-dot superlattice light-emitting diodes in Nature. In this work， rhombic dodecahedral CsPbBr3 quantum dots with high geometric symmetry and robust colloidal stability were developed through a ligand-fluoride co-stabilization strategy. Combined with capillary liquid-bridge confined assembly， this approach enabled the fabrication of superlattice thin-film arrays featuring in-plane long-range order， ultrathin vertical confinement and precise spatial patterning. The resulting devices achieved a peak external quantum efficiency of 30.9%， a maximum luminance of 117 144 cd·m-2 and a pixel density of 5 080 pixels per inch， and were further demonstrated in an active-matrix display. This work provides a viable route for applying ordered quantum-dot superlattices in high-resolution display technologies.关键词：perovskite quantum dots;superlattices;pixelated light-emitting diodes;ordered assembly;high-resolution displays210|31|0更新时间：2026-07-23
Research Highlight
- 摘要：With the advancement of intelligent optoelectronic systems toward multispectral capability， energy efficiency， miniaturization， and multifunctionality， the limited spectral response range of traditional photodetectors falls short of meeting their advanced sensing requirements， making the development of high-performance broadband photodetectors a significant challenge. To overcome this limitation， this study designs and fabricates a novel broadband photodetector based on a sandwich structure. The device uses gold as the middle electrode， β-Ga2O3 and MAPbI3 as the upper and lower light-absorbing layers， respectively， forming a three-layer stacked heterojunction that achieves efficient broadband detection from ultraviolet to near-infrared wavelengths （200-800 nm）. Under a 6 V bias， the device exhibits peak responsivities of 0.050 A·W-1 at 240 nm and 0.059 A·W-1 at 750 nm， along with microsecond-scale rapid response characteristics. The unique sandwich structure also enables self-powered broadband detection， providing an effective solution for high-performance and low-power next-generation photodetectors.关键词：photodetector;sandwich structure;broadband photodetector537|201|0更新时间：2026-07-23
- 摘要：Eu2+ can be excited by a broad blue light band and exhibits characteristics of broad wavelength emission. Due to the significant influence of the crystal field environment on Eu2+ ions， selecting appropriate host materials or adjusting host components can regulate the emission properties of Eu2+. This approach also enables the phosphor to be highly compatible with blue light chips， compensating for the red spectral deficiency in commercial white LEDs and enhancing the lighting quality of white LEDs. This study selected the gallate Ca5Ga6O14 as the matrix and synthesized Eu2+-doped red phosphor via a high temperature solid-state method. The luminescence properties were optimized by employing an Al3+ ion substitution strategy to replace Ga3+ cations in the host， and the quantum efficiency can reach 79.2%， and the luminous intensity at 423 K attained 60% of room temperature. By integrating the Ca5Ga5.8Al0.2O14∶0.01Eu2+ red phosphor with the commercial yellow phosphor Y3（Al， Ga）5O12∶Ce3+ and a blue light chip， a white LED device was fabricated， which exhibits a color rendering index （CRI） of 95.5 and a correlated color temperature （CCT） of 4 002 K.This demonstrates the promising application prospects of the red phosphor in the field of white light LEDs.关键词：Eu2+;red phosphor;oxide;white light-emitting diodes457|205|0更新时间：2026-07-23
Editor's Choice
- 摘要：In this work， two chiral polymer host materials （R-PBCz-N6 and S-PBCz-N6） based on dibenzo［b］carbazole structure without the need for chiral resolution were designed and synthesized starting from the naturally occurring chiral enantiomers of binaphthylamine. A systematic investigation combining theoretical calculations and experimental characterization was conducted to elucidate the molecular structures， photophysical/electrochemical properties， and device performance of these polymers. Experimental results reveal that the polymers possess a sterically twisted conformation， excellent thermal stability （Td > 460 ℃）， and intrinsic circularly polarized luminescence property. Notably， when the achiral narrowband emitter BN-TCZ was doped into the chiral hosts of R-PBCz-N6 and S-PBCz-N6， circularly polarized luminescence was successfully generated， demonstrating that chirality was induced in the achiral guest via the chiral host environment. The photoluminescence dissymmetry factors （glum） reached the order of 10-4. Organic light-emitting diodes （OLEDs） fabricated via solution processing， using R-PBCz-N6 and S-PBCz-N6 as hosts and BN-TCZ as the emitter， achieved maximum external quantum efficiencies （EQE） of 5.9% and 5.2%， respectively. This work provides a strategic design paradigm for chiral induction and the development of high-efficiency， solution-processed circularly polarized electroluminescent devices.关键词：Chiral polymers;circularly polarized luminescence;Solution process;Host materials256|15|0更新时间：2026-07-23
- 摘要：Penicillin G （PG）， as a broad-spectrum β-lactam antibiotic， has raised increasing concerns due to environmental residues caused by its overuse， necessitating the development of rapid and sensitive detection methods. In this paper， a tetrahedral metal-organic cage （Cage Zn） with aggregation-induced emission （AIE） activity was constructed via a subcomponent self-assembly strategy. The structure was systematically characterized by NMR， MS， and molecular simulation. Cage Zn exhibited significant solvent-polarity-dependent luminescent behavior and AIE characteristics， enabling reversible fluorescence information encryption and decryption. More importantly， Cage Zn served as a fluorescent probe for highly sensitive detection of PG， binding with PG in a 1∶1 stoichiometric ratio and achieving a fluorescence quenching efficiency up to 95% via a static quenching mechanism. Molecular dynamics simulations confirmed the spontaneity of the host-guest encapsulation. This study offers a novel approach for fabricating cost-effective AIE supramolecular materials， detecting antibiotic residues， and developing smart luminescent materials.关键词：Metal-organic cages;aggregation-induced emission;Information encryption;Penicillin G Recognition331|121|0更新时间：2026-07-23
- 摘要：This paper reports a series of AlF3-based glasses （AlF3-YF3-CaF2-BaF2-SrF2-MgF2-ErF3） with high Er3+ doping concentration and low hydroxyl （OH-） content， and systematically investigates their emission performance in the 2.7 μm band. Through optimization of the glass composition and the use of high-temperature melting， both an ultra-low OH- concentration （OH- absorption coefficient of 0.031cm-1） and a high Er3+ doping level （up to 12%（mole fraction）） were achieved simultaneously. Compared to previously reported AlF3-based glasses， the present material exhibits enhanced thermal stability （glass transition temperature Tg = 433 ℃， and thermal stability parameter ΔT = 89 ℃）， as well as chemical stability. Under 980 nm laser pumping， the emission intensity at 2.7 μm of the high-Er3+-doped， low-hydroxyl AlF3-based glass is significantly enhanced， with an emission cross-section of 5.28 × 10-21 cm2 and a high branching ratio of 20.69%. The substantial emission cross-section contributes to lowering the laser threshold and improving the slope efficiency. While the measured lifetime for the 4I11/2→4I13/2 transition is 7.651 ms. These combined properties indicate that the high-Er3+-doped， low-hydroxyl AlF3-based glass is a promising candidate for application in solid-state and fiber lasers operating in the 2.7 μm band.关键词：Fluoroaluminate glass;Er3+ doped;2.7 μm luminescence819|199|0更新时间：2026-07-23
- 摘要：Fiber lasers operating in the 2 μm spectral region possess advantages such as eye safety， high atmospheric transmission， and strong absorption by water molecules， making them of great interest for applications in precision sensing， advanced medical treatment， space optical communication， and defense-related technologies. However， achieving predictable design of high-performance mid-infrared gain glasses remains a significant challenge. In this work， based on the barium-zinc germanate （GeO2-ZnO-BaO） ternary system， the glass-forming region was predicted and verified by combining thermodynamic analysis with targeted experiments. A composition of 60GeO2-20ZnO-20BaO with optimal thermal stability was selected as the host matrix. On this basis， systematic concentration-dependent experiments were carried out， and the optimal doping mole fraction of Yb2O3 and Ho2O3 was determined to be 1% and 0.75%， respectively. Under 980 nm laser excitation， the glass exhibits strong emission around 2 μm corresponding to the Ho3+： 5I7→5I8 transition， with a fluorescence lifetime of 2.92 ms. The maximum absorption and emission cross sections of Ho3+ are 4.24×10-21 cm² and 4.35 × 10-21 cm2， respectively， which are relatively high among similar glass systems. Furthermore， the phonon-assisted energy transfer mechanism was quantitatively analyzed using the extended overlap integral method. The energy transfer coefficient for the Yb3+： 2F5/2→Ho3+： 5I6 process is calculated to be 9.88×10-41 cm6·s-1， with the single-phonon-assisted process dominating （86.37%）. In addition， the forward energy transfer efficiency is approximately two orders of magnitude higher than that of the backward transfer （Ho3+： 5I6→Yb3+： 2F5/2）， which is beneficial for suppressing energy back-transfer loss. These results indicate that the Yb3+/Ho3+ co-doped barium-zinc germanate glass， selected via thermodynamic design， exhibits favorable spectroscopic properties and efficient energy transfer characteristics in the 2 μm region， demonstrating its potential as a mid-infrared laser gain material and providing guidance for the design of related glass systems.关键词：Barium-zinc germanate glass;Thermodynamic prediction;Yb3+/Ho3+ co-doping;2 μm luminescence;Phonon-assisted energy transfer383|63|0更新时间：2026-07-23
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Effect of Gd₂O₃ on Emission Properties and Crystallization Behavior of Photo-thermo-refractive Glass 增强出版 AI导读
摘要：Photothermal refractive glass （PTR） is a functional material widely used in the fabrication of key photonic components such as volume Bragg gratings. Its core mechanism relies on controlled NaF crystal precipitation through photothermal induction. However， the regulatory effects of glass composition on its crystallization behavior and optical properties still require in-depth study. This paper systematically investigates the influence of Gd2O3 doping on the structure and properties of PTR glass. Optically， Gd3+ acts as a sensitizer， effectively enhancing the luminescence intensity of Ce3+ （up to 1.5 times that of undoped samples） via a resonance energy transfer mechanism， while maintaining stable fluorescence lifetime. Thermally and in terms of crystallization behavior， Gd3+ exhibits a distinct threshold effect —— at a doping mole fraction of 0.25%， it promotes NaF crystallization by serving as a heterogeneous nucleation center； however， at mole fraction ≥0.5%， it acts as a high-field-strength network modifier， completely suppressing NaF crystal precipitation. This study reveals the dual “promotion-inhibition” mechanism of Gd3+ in PTR glass， providing important theoretical and experimental foundations for the design of PTR glass compositions tailored to different functional requirements （such as enhanced luminescence or precise control of crystallization）.关键词：Photo-thermo-refractive glass;Gd2O3;NaF;Sensitizer;Volume Bragg gratings268|248|0更新时间：2026-07-23
Synthesis and Properties of Materials
- 摘要：Based on the one-pass amplification phenomenon of spontaneous emission， superluminescent diodes （SLDs） exhibit outstanding advantages including high output power， wide emission bandwidth and low temporal coherence. Benefiting from these superior properties， SLDs have shown great application potential in biomedical imaging， precision measurement instruments and optical fiber communication systems， thus becoming one of the research hotspots in the field of third generation semiconductor optoelectronic light sources. This paper systematically reviews the recent research progress of SLD devices， focusing on three key fabrication technologies： active layer material design， waveguide structure optimization and facet treatment improvement. With the continuous development and integration of these technologies， the performance， service stability and integration level of SLD devices have been continuously improved. On this basis， this paper summarizes the typical application progress of SLDs in optical coherence tomography systems， interferometric fiber optical gyroscope systems and optical fiber sensing systems， and further demonstrates their unique technical advantages in practical application scenarios. Finally， the development trends are prospected.关键词：superluminescent diode;quantum well;waveguide structure;optical coherence tomography1139|640|0更新时间：2026-07-23
- 摘要：In recent years， three-dimensional （3D） metal halide perovskite solar cells （PSCs） have emerged as a research hotspot in photovoltaics due to their exceptional power conversion efficiency. However， 3D perovskites tend to degradation under moisture， heat， and illumination， which caused adverse phase separation， ion migration， and surface defect formation. These issues result in interfacial heterojunction structure failure and device performance deterioration， significantly hindering the commercialization of PSCs. It has been demonstrated that two-dimensional （2D） perovskite materials can not only passivate defects of 3D perovskites but also provide a robust protective barrier based on their superior hydrophobicity. Consequently， the construction of 2D/3D heterostructures has been established as a potent strategy to simultaneously enhance the efficiency and stability of PSCs. This review systematically summarizes recent advancements in the utilization of 2D perovskites to enhance the performance of 3D PSCs. Firstly， the crystal structures and unique optoelectronic characteristics of 2D perovskites are categorized. Subsequently， improving the performance of 3D PSCs with 2D perovskites is elaborated from four specific dimensions： crystallization dynamics and thermodynamics control， interface engineering， additive engineering， and template-induced crystal-oriented growth. In conclusion， the present discussion focuses on contemporary challenges and puts forward a series of perspectives on future development directions for this field.关键词：perovskite solar cells;2D Perovskite;Power conversion efficiency;stability1364|300|0更新时间：2026-07-23
- 摘要：To address the demand for widely tunable， narrow-linewidth light sources in frequency-modulated continuous-wave （FMCW） optical phased array （OPA） LiDAR， this paper presents an S-band tunable narrow-linewidth laser based on a silicon nitride triple-micro-ring external cavity. The design utilizes hybrid integration of low-loss Si₃N₄ waveguides and an InP-based reflective semiconductor optical amplifier. Through a triple-micro-ring vernier filtering mechanism， a broad tuning range of 88 nm （1 450-1 538 nm） is achieved， while a long external cavity structure combined with high-Q micro-rings narrows the linewidth to approximately 0.89 kHz. Feedback stability is further enhanced by incorporating a tunable Sagnac loop reflector. Simulation results confirm that the laser meets key requirements， including tuning range， linewidth， and side‑mode suppression ratio， for S‑band sources in FMCW OPA LiDAR systems. Moreover， the S‑band output not only matches the high responsivity of Ge/Si photodetectors but also spectrally complements existing C‑ and L‑band sources. Future on‑chip integration could enable full S+C+L band coverage， offering a high‑performance and scalable laser solution for solid‑state LiDAR supporting wide‑angle beam steering.关键词：Integrated External Cavity Laser;Tunable Laser;Narrow-Linewidth;Microring1027|389|0更新时间：2026-07-23
- 摘要：To meet the urgent demand for narrow-linewidth， low-noise， and polarization-stable seed sources in advanced high-precision coherent measurement systems such as gravitational-wave detection， a 1 550 nm linearly polarized single-frequency fiber laser based on a homemade Er3+/Yb3+ co-doped fluorosulfophosphate fiber is designed and demonstrated. To address the difficulty in simultaneously optimizing multiple performance metrics in short-cavity single-frequency fiber lasers， the reflectivity of the low-reflectivity fiber Bragg grating and the gain fiber length are systematically optimized by numerical simulation prior to cavity construction， thereby improving the output performance. Experimental results show that the laser achieves stable 1 550 nm single-frequency linearly polarized emission， with a signal-to-noise ratio exceeding 70 dB， a polarization extinction ratio of 33 dB， a linewidth of 4.95 kHz， and high-frequency relative intensity noise lower than -149 dB/Hz， approaching the theoretical noise limit （-152.9 dB/Hz）. These results indicate that effective co-optimization among narrow linewidth， low noise， and high polarization performance is achieved in this scheme， which is expected to provide a high-quality seed source for highly sensitive optical systems such as gravitational-wave detection.关键词：single-frequency fiber laser;fluorosulfophosphate fiber;linear polarization;gravitational-wave detection403|109|0更新时间：2026-07-23
Device Fabrication and Physics
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Ligand-assisted Synthesis of Perovskite Nanocrystals and Their Application in Fe3+ Ion Detection 增强出版 AI导读
摘要：Inorganic lead halide perovskite nanocrystals （PNCs） CsPbX3 （X=Cl， Br， or I） have attracted significant attention due to their exceptional optical and electronic properties. However， their instability， particularly in aqueous solutions， poses a significant barrier to their practical applications. In this study， 10-bromodecanoic acid （BDA） and oleylamine （OAm） were selected from a series of bromine-containing organic acids with varying chain lengths as the optimal ligand combination. Through systematic investigation of their synergistic coordination effects， highly stable CsPbBr3 PNCs were successfully synthesized in aqueous solution. It was found that the molar ratio of BDA to OAm and the reaction temperature significantly influenced the luminescence performance and stability of CsPbBr3 PNCs. The PNCs synthesized at 60 ℃ with a 1∶1 molar ratio of the two ligands exhibited superior stability， which can be attributed to the coordination of carboxyl groups from BDA and the formation of a hydrophobic shell on the PNC surface by the long-chain amines from OAm. The photoluminescence intensity of these PNCs remained 3.7 times the initial value after 38 days of storage in aqueous solution. Furthermore， the application of PNCs for Fe3+ detection in aqueous solution was investigated， demonstrating a linear detection range of 31.8-250 μmol·L-1 and a detection limit of 10.5 μmol·L-1 for Fe3+. These results indicate that the PNCs hold promising potential as fluorescent probes for the detection of metal ions in aqueous media.关键词：perovskite nanocrystals;stability;luminescence;Fe3+ detection;ligand-assisted synthesis376|125|0更新时间：2026-07-23 -
Preparation of Carbon Dots with Antioxidant and Prooxidant Activities for Strawberry Preservation 增强出版 AI导读
摘要：Strawberries are fruits which widely cultivated worldwide， possessing high nutritional value and economic benefits. However， their high water content and vigorous metabolic activity result in an extremely short postharvest shelf life. In this study， a kind of dual-functional ammonium citrate-urea-based carbon dots（AU-CDs）， possessing both antioxidant and pro-oxidant properties， was synthesized via a one-step hydrothermal method. Under dark or low-light conditions （light intensity <0.1 mW·cm-2）， AU-CDs exhibit superoxide dismutase （SOD）- like and catalase （CAT）-like activities， effectively scavenging hydroxyl radicals （·OH）， superoxide anions （·O - 摘要：Nitrogen-doped carbon dots（N-CDs） were prepared by the hydrothermal method using glucose as the carbon source and m-phenylenediamine as the nitrogen source. The N-CDs have a large Stokes shift（Δλ=100 nm） and can be used for highly sensitive detection of Cr（Ⅵ） and chlortetracycline hydrochloride（CTC）. The functional groups on the surface of N-CDs interact with Cr（Ⅵ） to form a ground-state complex， causing static quenching. At the same time， the photoinduced electron transfer and internal filtering effects intensify the fluorescence quenching. Within the linear range of 0.2-300 µmol/L， the detection limit is as low as 35.7 nmol/L. In addition， by integrating the intelligent imaging technology of mobile phones， the visual quantitative analysis of Cr（Ⅵ） can be achieved， with a detection limit of 0.38 μmol/L. Based on static quenching and the inner filter effect， N-CDs can also be used to detect CTC within the range of 0.1-200 µmol/L， with a detection limit of 10.4 nmol/L. The method has been applied to the detection of Cr（Ⅵ） in electroplating wastewater， CTC in milk and chlortetracycline hydrochloride ointment. The spiked recovery rates ranged from 94.0% to 104.0%， and the relative standard deviations were all less than 3.3%. The method offers a practical and feasible solution for rapid detection in the fields of environment， food， and medicine， and also provides a new idea for portable and visual detection of Cr（Ⅵ）.关键词：Nitrogen-doped carbon dots;visual detection;Cr（Ⅵ）;Chlortetracycline hydrochloride;Quenching mechanism505|201|0更新时间：2026-07-23
Luminescence Applications and Interdisciplinary Fields
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