最新刊期
卷 46 ， 期 7 ， 2025
- “在发光显示领域，研究人员通过控制辛硫醇注入速率，实现了蓝光量子点的高效率稳定发光，为提升量子点发光性能提供了新思路。”摘要：Quantum dots （QDs） exhibit high photoluminescence quantum yield （PLQY）， high color purity， and solution processability， making them widely applied in the field of lighting and displays. However， achieving high-efficiency and stable blue QDs and their devices remains a significant challenge. In this work， CdZnS/ZnS core-shell structure blue QDs were investigated， with octanethiol （OT） as the sulfur precursor for shell growth. The shell growth rate was tuned by controlling the injection rate of OT， enabling controlled epitaxial growth. The impact of shell growth rate on shell quality and the photoluminescence performance of CdZnS/ZnS QDs was systematically analyzed through testing methods such as transmission electron microscopy and transient/steady-state fluorescence spectroscopy. The results show that moderately reducing the growth rate effectively promotes uniform shell growth， achieving a high PLQY of 98% and a narrow full width at half maximum （FWHM） of 22 nm. However， excessively slow growth rates result in anisotropic shell growth， accompanied by the Kirkendall effect， resulting in a large number of lattice defects that reduce the photoluminescence performance. This work deepens the understanding of how growth rate affects the quality of QDs shell growth.关键词：CdZnS/ZnS quantum dots;precursor injection rate;shell growth dynamic;photoluminescence performance113|83|0更新时间：2025-07-18
Cover Story
- “在光电集成芯片和智能传感领域，微型化、低能耗且性能优异的光电传感器研究取得新进展。专家深入探讨了极化场调控的热释电光电探测器，为智能传感等领域提供新思路。”摘要：Miniaturized， low-power， and high-performance photoelectric sensor is a key research topic in integrated optoelectronic chips and intelligent sensors. Particularly， pyro-phototronic detectors have emerged as a vital research direction in optoelectronic sensing due to their self-powered capability， fast response， high responsivity， and broad bandwidth. Here， the fundamental principles of pyro-phototronic effect are elucidated， followed by an overview of performance optimization strategies and specialized applications of this effect in various junctions-based photodetectors. Subsequently， enhancement of non-uniform polarization field on pyro-phototronic effects in PN junctions is demonstrated through enhancement mechanism and constructing methodologies for gradient polarization fields. Based on the engineered gradient polarization， we achieved the PN-junction pyro-phototronic detectors with superior performances in responsivity and spectral bandwidth. Finally， we offer insight into the future development of pyro-phototronic detectors in design principles， device architectures， and specific applications. The studies on polarization-field-tuned photodetectors offer flexible design paradigms for advancing pyro-phototronic sensing， which might significantly accelerate the practical applications of pyro-phototronic detectors in smart sensing， communication and ultrafast imaging.关键词：Pyro-phototronic effect;Polarization field;Gradient Polarization field;Photodetector;Self-power68|57|0更新时间：2025-07-18
- “在X射线探测领域，玻璃闪烁体材料取得显著进展，为解决探测需求提供新方向。”摘要：Glass scintillators are highly stable detection materials that play a crucial role in medical imaging， security inspection， and various other applications. They also provide enhanced adaptability and detection performance in extreme environments， such as deep-sea， deep underground， deep space， and nuclear reactor. However， the development and application of commercially available GS series glass scintillators are hindered by their relatively low light yield and narrow application range （neutron field）， which are insufficient to meet the demands of X-ray detection applications. Consequently， there is an urgent need to develop a series of glass scintillators with superior X-ray detection performance to satisfy the requirements in X-ray and related fields. In recent years， significant progress has been made in the development of X-ray-related glass scintillator materials， the exploration of their mechanisms， and the expansion of their applications. However， few studies have specifically focused on X-ray detection glass scintillators as a distinct topic， addressing their development and applications. This paper provides a brief overview of the historical development， material classification， detection principles， detection parameters， and fabrication processes of X-ray detection glass scintillators. It particularly emphasizes the design concepts， research advancements， detection performance， and challenges associated with rare-earth-based and perovskite-type glass scintillators. Additionally， the paper explores future directions and challenges in X-ray detection glass scintillators， taking into account common issues and the current state of development in this field.关键词：Glass Scintillators;X-ray Detectors;Rare-earth Luminescent Type;Perovskite Type312|234|0更新时间：2025-07-18
- “聚焦多光谱X射线成像技术，深入分析关键技术环节，探讨原理、特点及研究进展，为深入研究与工程应用提供理论指导和实践参考。”摘要：X-ray imaging technology serves as a core tool in medical diagnosis and industrial non-destructive testing， where imaging quality directly impacts diagnostic accuracy and detection precision. However， traditional X-ray imaging technology is limited by its energy-integrating detection mode， resulting in insufficient imaging contrast in complex scenarios. To overcome this technical bottleneck， multispectral X-ray imaging technology has emerged. This paper focuses on multi-energy X-ray imaging technology based on scintillator encoders， detailing multispectral detectors utilizing stacked scintillator encoding and side-incident depth information extraction. By thoroughly analyzing key technical aspects such as material selection and preparation， device structure design， and algorithmic analysis， the principles， characteristics， and research progress of this technology are comprehensively explored. The paper summarizes existing achievements and current challenges， while also providing insights into future development trends， aiming to offer theoretical guidance and practical references for further research and engineering applications of multispectral X-ray imaging technology.关键词：Scintillator encoder;multispectral X-ray imaging;Stacked scintillator;Side incidence detector;Algorithm analysis52|50|0更新时间：2025-07-18
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Recent Progress of Zero-dimensional Hybrid Antimony-based Metal Halide Materials in X-ray Detection 增强出版 AI导读
“在X射线探测与成像领域，零维杂化锑基金属卤化物展现出高光致发光量子产率和优异的结构可调性，为开发新型闪烁体材料提供新思路。”摘要：The development of new scintillator materials with both high luminescence performance and environmental friendliness is urgently needed for the high-sensitivity and low-dose development of X-ray detection and imaging technologies.Zero-dimensional antimony-based metal halides exhibit high photoluminescence quantum yield （PLQY）， large Stokes shifts， and excellent structural tunability by virtue of their unique 5s2 electronic configurations and self-trapped excitons （STEs） radiation mechanisms， which make them promising candidates for lead-free scintillators.In this paper， we systematically review the luminescence mechanism and design strategy of zero-dimensional antimony-based hybrid metal halides and their research progress in X-ray detection and imaging.It is shown that such materials exhibit excellent light yield and low detection limit under X-ray excitation， while high spatial resolution imaging is achieved in X-ray imaging applications.Finally， we point out the main challenges currently faced by zero-dimensional hybridised antimony-based metal halides and provide an outlook on their future directions.关键词：Zero-dimensional hybrid antimony-based metal halides;X-ray detection and imaging;scintillators;Current status of research85|163|0更新时间：2025-07-18
Invited Paper
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Surface Chemistry Engineering of Gold Nanoclusters Toward High-efficiency White Light Emission 增强出版 AI导读
“In the field of metal nanoclusters, researchers have made significant progress. Expert xx elaborately deployed surface chemistry engineering strategy, achieving efficient white light emission from Au10 NCs. This study exemplifies the paradigm to control the emission color and improve the photoluminescence quantum yield of metal NCs through rational surface chemistry engineering.”摘要：Photoluminescence （PL） is one of the most important properties of metal nanoclusters （NCs）. Achieving efficient white light emission in metal NCs with a precise structures is important for practical applications but remains a great challenge. Here， we report the efficient white emission from Au10 NCs by elaborately deploying the surface chemistry engineering strategy. Specifically， the bis-aldehyde ligands of 4-hydroxyisophthalaldehyde （HOA） are decorated on the surface of Au10（SG）10 NCs （glutathione denoted as SG） through the cross-linking reaction of imine bonds （—CHN—）. The combination of 477 nm blue emission from HOA ligands and 620 nm orange-yellow emission from Au10（SG）10 NCs generates white-light emission in HOA-Au10（SG）10 NCs in the solvent mixture of ethanol and water. More importantly， dynamic color tuning from blue light to yellow light is achieved by controlling the volume fraction of ethanol in the solvent mixture. In addition， the as-formed imine bonds significantly improve the structural rigidity of HOA-Au10（SG）10 NCs， resulting in the 51.2% absolute photoluminescence quantum yield （PLQY） of white emission. The present study exemplifies the paradigm to control the emission color and improve the PLQY of metal NCs through rational surface chemistry engineering. 关键词：metal nanoclusters;white-light emission;electron transfer121|160|0更新时间：2025-07-18 - “In the field of broadband near-infrared luminescent materials, a novel approach has been introduced. Expert researchers developed an erbium-sensitized core-shell nanocrystal design, which provides solutions to develop broadband NIR luminescent materials and devices.”摘要：Broadband near-infrared （NIR） luminescent materials have shown great promise in applications such as optical communication， biomedicine， and optoelectronic devices. However， the current research is focused on phosphors and glasses， and it is important to develop broadband NIR luminescent nanomaterials. Here， we report an erbium-sensitized core-shell nanocrystal design for broadband NIR emission. Based on the structural design with suitable dopings of Tm3+ and Ho3+， the broadband NIR emission covering 1.5-2.1 µm region is achieved under 980 nm and 808 nm excitations. Moreover， the emission intensity is further enhanced by introducing Yb3+ and Nd3+ into the sample， respectively， and the energy transfer processes between them are systematically discussed. Our results present a novel approach for developing broadband NIR luminescent materials and devices.关键词：Broadband near-infrared luminescence;lanthanide ions;core-shell structure;energy transfer59|93|0更新时间：2025-07-18
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White Light Emission Enhancement in Sm3+-doped Lithium Aluminum Silicate Glasses by Ag Nanoparticles 增强出版 AI导读
“In the field of solid-state lighting devices, researchers have made significant progress. They introduced Ag aggregates into Sm3+-doped lithium aluminum silicate glass through Ag ion exchange, achieving excellent white emission. The study reveals that the surface plasmon resonance effect of Ag nanoparticles enhances the luminescence of Sm3+, while the energy transfer mechanism between Ag+ and Sm3+ also promotes fluorescence enhancement.”摘要：Sm3+-doped materials exhibit red and orange emissions in the visible light region， showing broad application prospects in both laser and display material fields. However， the inherent small emission and absorption cross-sections of Sm3+ result in low luminous efficiency， posing challenges for achieving high-quality solid-state lighting. Here， the excellent white emission of Sm3+ doped lithium aluminum silicate （LAS） glass was realized by introducing the Ag aggregates through Ag ion exchange. Under 395 nm excitation， the Ag-doped samples exhibit significant fluorescence enhancement with color coordinates close to the equal energy white point E （0.33， 0.33） and a color rendering index （CRI） of 81.8. The study reveals that the surface plasmon resonance （SPR） effect of Ag nanoparticles enhances the luminescence of Sm3+， while the energy transfer mechanism between Ag+ and Sm3+ also promotes fluorescence enhancement. By adjusting the concentration of AgNO3 and the exchange time， a series of high-quality full-spectrum white light emissions were obtained， indicating that the Ag ion-exchanged Sm3+-doped LAS glass has good application potential in the development of solid-state lighting devices. Moreover， variations in the excitation wavelength can effectively tune the emission color， further demonstrating the tunability and practicality of this material in optoelectronic applications.关键词：Ag NPs;luminescent properties;rare earth ions;lithium aluminum silicate glass87|86|0更新时间：2025-07-18
Editor's Choice
- “最新研究突破了量子点发光二极管性能限制，采用CuSCN和Poly-TPD显著提升发光亮度和电流效率，为高效QLED应用提供理论支持和实践指导。”摘要：Quantum dot light-emitting diodes （QLEDs） are promising for future display and lighting technologies due to their excellent optical properties and ease of fabrication. However， traditional hole injection materials like PEDOT∶PSS limit QLED performance. This study explores copper thiocyanate （CuSCN） as the hole injection layer， paired with CdSe/ZnS green quantum dots and various hole transport layers （HTLs） such as PVK and Poly-TPD. We assessed the optoelectronic properties of these devices under both alternating current （AC） and direct current （DC） conditions. Our results reveal that the energy level barrier between CuSCN and PVK leads to charge trapping， which adversely affects performance. In contrast， Poly-TPD， with its higher hole mobility and shallower HOMO energy level， alleviates charge trapping， significantly enhancing brightness and current efficiency to peak values of 132 075 cd/m² and 15.6 cd/A， respectively. This research provides insights into the charge trapping mechanism at the CuSCN/HTL interface， highlighting CuSCN as a viable alternative to PEDOT∶PSS for improving QLED efficiency.关键词：copper thiocyanate （CuSCN）;quantum dot light-emitting diodes （QLEDs）;hole injection;trapped charge;alternating current93|133|0更新时间：2025-07-18
Research Letter
- “In the field of semiconductor bandgap determination, a new study clarifies the differences between excitonic absorption, modulation spectroscopy, and Tauc-plot methods. Expert xx established the xx system, which provides solutions to solve the problem of inaccurate bandgap determination.”摘要：Although there are numerous optical spectroscopy techniques and methods that have been used to extract the fundamental bandgap of a semiconductor， most of them belong to one of these three approaches： （1） the excitonic absorption， （2） modulation spectroscopy， and （3） the most widely used Tauc-plot. The excitonic absorption is based on a many-particle theory， which is physically the most correct approach， but requires more stringent crystalline quality and appropriate sample preparation and experimental implementation. The Tauc-plot is based on a single-particle theory that neglects the many-electron effects. Modulation spectroscopy analyzes the spectroscopy features in the derivative spectrum， typically， of the reflectance and transmission under an external perturbation. Empirically， the bandgap energy derived from the three approaches follow the order of Eex > EMS > ETP， where three transition energies are from excitonic absorption， modulation spectroscopy， and Tauc-plot， respectively. In principle， defining Eg as the single-electron bandgap， we expect Eg > Eex， thus， Eg > ETP. In the literature， ETP is often interpreted as Eg， which is conceptually problematic. However， in many cases， because the excitonic peaks are not readily identifiable， the inconsistency between Eg and ETP becomes invisible. In this brief review， real world examples are used （1） to illustrate how excitonic absorption features depend sensitively on the sample and measurement conditions； （2） to demonstrate the differences between Eex， EMS， and ETP when they can be extracted simultaneously for one sample； and （3） to show how the popularly adopted Tauc-plot could lead to misleading results. Finally， it is pointed out that if the excitonic absorption is not observable， the modulation spectroscopy can often yield a more useful and reasonable bandgap than Tauc-plot.关键词：Semiconductor material;bandgap;excitonic absorption;modulation spectroscopy;Tauc plot86|83|0更新时间：2025-07-18
Views on Basic Knowledge of Luminescence
- “在高效红光上转换新材料领域，研究人员采用高温固相法制备了Eu3+/Yb3+共掺Gd3Zn2GaGe2O12荧光粉，实现了从浅绿色到红色的可视性光色调控，为多色荧光防伪应用提供新可能。”摘要：Near-infrared excitable multicolor visible upconverting phosphors have been become a hot research topic in recent years， amongst which the explorations on red upconversion feature significant interests. In this paper， a series of Eu3+/Yb3+ codoped Gd3Zn2GaGe2O12 （abbreviated as GZGGO∶Eu3+，Yb3+） upconverting phosphors were prepared by high temperature solid state method. By means of X-ray powder diffractometer （XRD）， Rietveld refinement， scanning electron microscope （SEM）， and energy-dispersive X-ray spectrometry （EDS）， the phase identification， crystal structure， particle morphologies and size distribution， and elemental distribution were systematically analyzed. Pumped by a NIR ~ 980 nm laser， the GZGGO∶Eu3+，Yb3+ sample yields a series of upconversion bands in visible region， exhibiting variable colors from light green to orange， to orange red， and to red with the naked eye. A typical two-photon absorption process was responsible for the observed upconversion of Eu3+/Yb3+ couple， and an optimal sample was determined to be GZGGO∶35%Eu3+，20%Yb3+. Temperature-dependent upconversion was carried for the optimized sample for probing its relatively good performance of optical thermal stability. Further development of Eu3+/Yb3+ codoping would lead to breakthrough in fabricating novel red upconverting materials， and the related visual color control will offer big potentials in the application of multicolor fluorescent anti-counterfeiting.关键词：rare earth ions;Eu3+;Yb3+;upconversion;energy transfer74|28|0更新时间：2025-07-18
- “铁电氧化物Bi4Ti3O12稀土离子掺杂研究取得进展，实现了发光强度的电场调控，为光信息存储和光电突触器件等领域提供新思路。”摘要：Ferroelectric oxide Bi4Ti3O12（BIT） possesses a unique layered perovskite structure and excellent ferroelectric properties， capable of inducing structural distortions in the crystal lattice under an external electric field. Rare-earth （Re3+） ion doping of BIT has attracted significant attention due to the sensitivity of its luminescence intensity to changes in crystal symmetry， implying that the luminescence intensity of Re3+ can be modulated by applying an external electric field. However， simultaneously achieving superior luminescence and ferroelectric performance imposes higher requirements on the doping species and concentration of rare-earth ions， presenting a major challenge in this field. In this study， BIT films with different Eu3+ doping concentrations （BIT∶xEu） were prepared using the sol-gel method and their ferroelectric and luminescent properties were systematically investigated. The films achieved enhanced ferroelectric performance at low doping concentrations （x ≤ 0.5）. Meanwhile， at x = 0.3， the photoluminescence （PL） intensity of the BIT∶xEu films was modulated dynamically and reversibly in real time by applying an external electric field. By manipulating the PL emission， we successfully mapped designed digital encoding electrical signals to visible light emission waveforms， achieving information encoding. These findings provide new possibilities for applications in optical information storage and optoelectronic synaptic devices.关键词：Bi4TI3O12;Eu3+ doping;ferroelectricity;sol-gel method;signal encoding82|33|0更新时间：2025-07-18
- “在光学领域，研究人员利用氢氧焰和CO₂激光器加热技术，成功制备了花生形WGM微腔阵列，为变形WGM微腔研究与应用奠定了基础。”摘要：The deformed whispering gallery mode （WGM） microcavity combines the advantages of high quality factor and rich internal mode paths， demonstrating significant research value in chaotic dynamics， sensing detection， and directional emission. This paper presents a hybrid fabrication method combining traditional hydrogen-oxygen flame heating and carbon dioxide laser heating. Initially， two optical fibers were fused and stretched together using hydrogen-oxygen flame heating. Subsequently， secondary fusion stretching was performed through CO₂ laser heating to fabricate a peanut-shaped WGM microcavity array. Experimentally， we investigated the effects of stretching distance during flame heating and the spacing between two CO₂ laser heating positions on the dimensions and morphology of the peanut-shaped cavities. Using a tapered fiber coupling， we explored coupling intensities at different angles and confirmed their directional emission characteristics. Furthermore， experiments were conducted using fibers of different diameters and hollow glass tubes in combination processing to fabricate peanut-shaped cavities with two lobes of different diameters and single hollow lobes in an asymmetric configuration. The emission characteristics of these cavities were simulated and studied， confirming the universality of this approach. This work proposes a simple method for rapid batch fabrication of WGM peanut-shaped cavities， laying a foundation for research and applications of deformed WGM microcavities.关键词：whispering gallery mode;Peanut-shaped cavity;Directional emission characteristics;sensing45|63|0更新时间：2025-07-18
Synthesis and Properties of Materials
- “在激光雷达领域，采用HiBBEE外延芯片的锥形半导体激光器实现高亮度、低发散角输出，亮度达25 MW·cm-2·sr-1，垂直发散角降至8.0°。”摘要：To achieve high-brightness and low divergence angle output for a 1 060 nm semiconductor laser， a high-brightness vertical broad-area edge-emitting （HiBBEE） epitaxial wafer was utilized， and a HiBBEE tapered semiconductor laser was designed and successfully fabricated. A 7 μm narrow ridge waveguide is designed to achieve single-mode output and a 100 μm tapered waveguide section at the rear facet for power amplification. At a driving current of 1.5 A， the laser achieves a brightness of up to 25 MW·cm-2·sr-1. The device exhibits a vertical divergence angle of 8.0° due to the HiBBEE structure. This laser has significant applications in the eye-safety Lidar application.关键词：Tapered semiconductor laser;HiBBEE;high-brightness;beam quality110|57|0更新时间：2025-07-18
- “最新研究突破：共轭静电纺丝技术制备出柔性电致发光纤维，可识别液体种类和浓度，实现可视化信息交互。”摘要：With the rapid development of electronic devices and the demand for flexible wearable display devices， it is urgent to develop a flexible electroluminescent fiber device. In this paper， a ZnS∶Cu-based liquid bridged ACEL fiber device was prepared by the method of conjugate electrospinning. The test results show that the device has good mechanical properties and electroluminescence properties. The effects of electrospinning layer number and voltage on the luminescence properties of fibers were investigated. With the increase of spinning layer number， the luminescence intensity of fibers increased first and then decreased， and the electroluminescence performance was the best when the number of layers was 3. With the increase of the driving voltage， the luminance of the fiber gradually increases， and the luminance of the luminous fiber can reach 192.5 cd·m-2 under the driving condition of 3.77 V·μm-1 and 10 kHz. The electroluminescent fibers prepared in this work can effectively distinguish different liquid electrodes， and have the function of identifying liquid types and concentrations in specific scenarios. In addition， visual information interaction can be achieved by embedding electroluminescent fibers into the fabric to form patterns with information.关键词：ZnS∶Cu;ACEL fiber device;liquid bridge;conjugate electrospinning108|98|0更新时间：2025-07-18
Device Fabrication and Physics
- “In the field of near-infrared reflective materials, a novel polymer (PU-PDI) with intrinsic NIR reflective properties was synthesized by covalent incorporation of PDI units into polyurethane chains. Expert xx verified the PU-PDI system, which provides solutions to solve the problems of mechanical properties and NIR reflectance properties.”摘要：Doping perylene diimide（PDI） into a polymer matrix is a simple strategy to prepare near-infrared（NIR） reflective materials， but the mechanical properties and NIR reflectance properties are significantly compromised due to macro-phase separation. In this study， a novel polymer（denoted as PU-PDI） with intrinsic NIR reflective properties was synthesized by covalent incorporation of PDI units into polyurethane chains. Its photophysical characteristics， mechanical property and NIR reflectance property are investigated in detail. The results show that covalent incorporation reduces the severe aggregation of PDI units， thereby endows PU-PDI with excellent mechanical property. The elongation at break of PU-PDI can reach more than 700%， and the breaking strength is 34.11 MPa. Moreover， compared to the blending system， PU-PDI possesses enhanced NIR reflection ability due to the better dispersion of PDI units.关键词：perylene diimide;polyurethane;near-infrared（NIR） reflectance142|111|0更新时间：2025-07-18
- “在慢性炎症性关节疾病研究领域，科学家们开发了一种近红外荧光探针HN，用于快速准确检测HOCl，为类风湿性关节炎治疗提供新方法。”摘要：Elevated levels of hypochlorous acid （HOCl） may be one of the hallmarks of chronic inflammatory joint disease. Therefore， the development of effective methods for rapid and accurate detection or monitoring of HOCl is important for further understanding the role of HOCl in rheumatoid arthritis （RA）. Herein， a near-infrared （NIR） fluorescent probe （HN） for the detection and monitoring of HOCl was reported. In the presence of HOCl， the phenolic hydroxyl group of HN is oxidized to produce quinone compounds， resulting in quenching of its NIR fluorescence. Probe HN has several advantages such as long emission wavelength （λem=660 nm）， large Stokes shift （200 nm）， high selectivity and sensitivity （LOD is 54.8 nmol/L）， and wide pH applicability range （4.5-10.5）. The “naked-eye” detection of HOCl in real water samples has been realized using the probe HN-based test strip. In addition， the probe has been successfully used for fluorescence imaging of exogenous and endogenous HOCl in living zebrafish and mice. Most importantly， the probe HN has shown remarkable effectiveness in monitoring HOCl-mediated responses to RA therapy. Thus， HN provides a novel approach to further understand the role of HOCl in RA and evaluate the efficacy of drug therapy for RA.关键词：bioimaging;fluorescent probes;hypochlorous acid;real water samples;rheumatoid arthritis132|78|0更新时间：2025-07-18
Luminescence Applications and Interdisciplinary Fields
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