最新刊期
卷 44 ， 期 7 ， 2023
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Room-temperature Holographic Spectral Hole-burning: Implementation Path and Research Prospect 增强出版 AI导读
“介绍了其在光存储领域的研究进展，相关专家探索了光谱烧孔型全息存储课题，为海量“冷数据”存储开辟了新方向。”摘要：Spectral hole-burning holographic storage has the characteristics of high-density， anti-interference and low-energy-consumption， and has potential ability of storing massive “cold data”. Based on our own research experience， we briefly review the development process and existing bottlenecks of spectral hole-burning. We propose a new idea to achieve room-temperature holographic spectral hole-burning in a functional unit of transition-metal-oxide/noble-metal， which is based on the principle of plasmatic spectral hole-burning. Then we present the latest achievements in large-area holographic discs and compact-type holographic memory devices. We also have a prospect for future work on high-density holographic spectral hole-burning in frequency domain via orderly arrangement of functional units. A series of work of the author's group open up a new direction for high-density optical storage， and provide a useful idea for the development of transition-metal-oxide-based optoelectronic devices with high-integration.关键词：spectral hole-burning;transition-metal-oxide;plasmon;holographic storage840|1020|0更新时间：2026-03-28 - “介绍了其在脑成像领域的研究进展，专家们探索了不同类型NIR⁃Ⅱ荧光探针及优化其光学性能的策略，为解决脑血管成像和重大脑疾病诊断问题提供了新思路。”摘要：At present， fluorescence imaging has become one of the important tools in biomedical applications， but it is very susceptible to the limited penetration of light and auto-fluorescence in tissues. Compared with the fluorescence imaging in visible region and the first near-infrared window（NIR-Ⅰ）， the second near-infrared（NIR-Ⅱ） fluorescence imaging show the deeper penetration depth， lower background noise， higher imaging resolution， sensitivity， and signal-to-noise ratio， thus demonstrating the promising applications in cerebrovascular imaging and diagnosis of major brain diseases. Based on this， we mainly focus on the construction of different NIR-Ⅱ fluorescent probes and several strategies to optimize their optical performance. Meanwhile， the recent progress of these probes in brain imaging is summarized and some issues facing the future clinical applications are discussed.关键词：fluorescence imaging;NIR-Ⅱ;fluorescence probe;Brain diseases1466|1441|4更新时间：2026-03-28
- “稀土纳米晶上转换发光研究取得新进展，相关专家通过组成、结构及核壳结构设计，深入理解能量传递路径，提高发光强度与选择性，为多领域应用提供有力支持。”摘要：In recent years， upconversion emission of rare earth nanocrystals， which can convert near-infrared light to short-wavelength visible or near-infrared one， has attracted extensive attention from researchers in the fields of biological imaging， nanothermometer， solar cells， and so on. For multi-field applications， upconversion emission of rare earth nanocrystals needs to improve the luminescent intensity， luminescent wavelength selectivity， and excitation wavelength. In this paper， we briefly review the research progress in improving the color， luminescence intensity， and luminescence lifetime of upconversion emission on the basis of understanding the energy transfer pathway and upconversion emission process through the design of composition， structure and core-shell structure at the nanoscale. In addition， the coupling between nanocrystals and precious metal surface electromagnetic fields， surface organic molecules and ambient temperature is also concerned. The research trend of increasing the intensity of rare earth upconversion luminescence in terms of increasing radiation transition probability and reducing non-radiation quenching is also mentioned.关键词：rare earth nanocrystals;upconversion emission;core/shell structure2128|4686|2更新时间：2026-03-28
- “介绍了其在日盲紫外探测领域的研究进展，专家们探索了镓基氧化物薄膜及其探测器课题，为该领域发展开辟了新方向。”摘要：Solar-blind ultraviolet photodetectors have broad application prospects in the fields of national defense and civilian use. The solar-blind ultraviolet photodetectors based on wide bandgap semiconductor materials are recognized as new generation of ultraviolet detector with the characteristics of no expensive filter， low working voltage， all-solid-state， small size， light weight， strong anti-interference ability， and wide operating temperature range. Among these wide bandgap semiconductors， gallium containing oxides with Ga2O3 as a typical representative have become research hotspot in the field of microelectronics and optoelectronics because of their excellent electrical and optoelectronic properties， especially their unique characteristics such as intrinsic solar-blind， high temperature resistance， high pressure resistance and good chemical stability， which makes such materials show great potential in the field of solar-blind ultraviolet photodetectors. In view of this， this article reviews the research progress in the past five years of gallium-based oxide films such as Ga2O3 with different crystal structures， gallate oxide， gallium aluminum （or tin， indium） oxide and their solar blind ultraviolet detectors.关键词：Solar-blind;Ultraviolet Photodetectors;gallium oxide;Gallium-based Oxide;Gallate oxide;Gallium Containing Ternary Oxides1194|1383|4更新时间：2026-03-28
- “介绍了白光LED领域最新进展，专家开发出Eu2+/Ce3+激活的近紫外LED用发光材料，优化商用荧光粉性能并探索新体系，为健康照明发展提供参考。”摘要：As a new generation of solid-state lighting source， white LED has shown outstanding performance advantages in energy conversion efficiency， brightness， chemical stability and environmental protection， and is widely used in the lighting field. Among its various white light construction methods， “near ultraviolet LED+ multicolor phosphors” is more conducive to the realization of high color rendering index and low color temperature healthy lighting， which has been highly concerned. The development and performance control of high-quality multi-color luminous materials is also a research hotspot in recent years. This paper introduces the latest development of Eu2+/Ce3+ activated luminescent materials for near ultraviolet LED， including the performance optimization of commercial powder and the development of new system， and discusses the means of material design and performance control. Finally， some opportunities and challenges of luminescent materials for near ultraviolet LED are discussed， This review provides reference and guidance for the development of white LED.关键词：rare earths;luminescent materials;n-UV LEDs;property regulation883|848|4更新时间：2026-03-28
- “稀土掺杂无序结构晶体在光学领域取得新进展，专家通过改变局域结构调控发光性能，为发光材料应用开辟新方向。”摘要：Lanthanide ion （Ln3+）-doped disordered materials exhibit excellent downshifting and upconversion luminescent properties， which can be widely used in a variety of optical and optoelectronic fields through luminescence modulation. The optical properties of Ln3+ ions are closely related to the local structure of crystal field. Thus， by using Ln3+ as a sensitive structural probe， the local structure and local site symmetry of Ln3+ dopants in luminescent materials can be determined. Meanwhile， it is also an effective strategy to optimize the luminescence of Ln3+ by modulating the local site symmetry of the Ln3+-doped disordered materials. In this review， we first clarify the crystallographic lattice site symmetry and spectroscopic lattice site symmetry of Ln3+-doped disordered crystals. Then， we systematically summarize the latest achievements of downshifting/upconversion luminescence manipulation by changing the microstructures around Ln3+ dopants， including internal composition and external field regulation. Finally， the challenges and prospects of Ln3+-doped disordered luminescent materials are discussed in detail.关键词：Disordered crystals;luminescent materials;Local site symmetry;Lanthanide doping;Luminescence manipulation1511|2122|4更新时间：2026-03-28
- “过渡金属离子在发光材料领域备受关注，相关专家通过第一性原理计算，探索了固体中TM离子的热力学和光跃迁性质，为发光材料的机理研究、理性设计和优化提供了新思路。”摘要：Transition metal （TM） activators have been widely studied for their extraordinary optoelectronic properties and great potential application in near-infrared luminescence or persistent luminescence， infrared laser， phosphor-converted white light-emitting diodes， luminescence thermometry and so on. However， due to the multiple valence states and multiple site occupancies， and the strongly local-environment-dependent optical properties， it is challenging to determine the sites and valences of the luminescent center， to decipher the luminescent mechanisms and to predict the photoluminescence properties of TM activators in solids. Here， first-principles calculations have been performed to study the thermodynamic and optical properties of TM ions in solids. The defect formation energies are calculated to analyze the effects of intrinsic defects and the site occupancies， valence states， distribution and concentration of TM ions in host. The local environment dependent luminescence is analyzed by calculating the excited-state energy levels of TM activators in various lattice environment. The configuration coordinate diagrams are constructed to analyze the excitation， relaxation and emission processes. Then， a theoretical scheme is proposed to regulate the site-occupancy， valence states and optical transitions of TM ions in solids via tuning the sintering atmosphere， coexistence conditions， and especially co-doping impurities. We select several typical systems to show the rationality and effectiveness of first-principles calculations， which include the mechanisms of residual infrared absorption in Ti∶Al2O3 crystal and the method of mitigating or eliminating the infrared absorption， the site occupancies and optical transitions of Mn2+，Mn3+，Mn4+ in typical spinel and garnet hosts， the site occupancies， valence states and optical transitions of Cr3+/4+ ions in oxide compounds. The results show that first-principles calculations form effective approaches for elucidating the multi-site and multi-valence nature of TM ions in solids and predicting their optical transitions， which are beneficial for the rational design and optimization of related optical materials.关键词：transition metal ions;optical transitions;first-principles calculation1454|4938|1更新时间：2026-03-28
- “介绍了其在TADF领域研究进展，课题组探索了溶剂化对D⁃A体系延迟荧光影响及调控，为TADF分子设计合成提供指导。”摘要：Thermally activated delayed fluorescence （TADF） materials with distinct electron donor and acceptor（D-A） segments can achieve theoretically 100% internal quantum efficiencies via the reverse intersystem crossing（RISC） process， thus receiving tremendous attention in lighting， display， and biomedical fields. Generally， D-A systems with intramolecular charge transfer（ICT） characteristics minimize singlet-triplet energy gap（ΔES-T） by having molecular conformations twisted， so that the RISC process takes place rapidly. Once the dihedral angle of D-A segments in the excited molecular conformation is further twisted， approaching 90°， ΔES-T will be smaller and the TADF characteristics will be also enhanced. However， conformational changes of excited states， ICT process and TADF emission are often influenced by solvent effect， which poses a challenge for understanding luminescence mechanism of TADF molecules. This review mainly summarizes the recent progresses in the influence of solvation on the delayed fluorescence made by our groups. As a result， it is shown that strongly polar solvents lead to an increase in non-radiative relaxation that is averse to TADF， as well as alteration of solvent viscosities affects the excited state conformational relaxation， resulting in the enhancement or weakening of TADF. These results are valuable for understanding the role of solvation in conformational relaxation and TADF emission， and provide guidance for the design and synthesis of TADF molecules.关键词：organic donor-acceptor systems;thermal activated delayed fluorescence;solvation;intramolecular charge transfer751|1243|0更新时间：2026-03-28
- “介绍了量子点在量子光学领域的研究进展，专家探索了量子点与光学微纳结构耦合课题，为构建可靠片上光学网络开辟了新方向。”摘要：Due to the quantum confinement effect， self-assembled semiconductor single quantum dots exhibit atom-like discrete energy levels enabling highly indistinguishable， high brightness and high purity single photon emission， where multiple exciton states in quantum dots can generate photons with different polarizations. The optical micro-nano structure is an effective means to modulate the luminescent properties of single quantum dots. When a single quantum dot is weakly coupled to an optical micro-cavity， the Purcell effect will greatly improve the performances of the quantum dot as a single photon source or entangled photon-pair source. Meanwhile， the strongly coupled system of quantum dots and optical micro-cavities can be used as quantum nodes in the quantum photonic network or to study the nonlinear optics at the single photon level. Utilizing the coupling of quantum dots and optical waveguides can realize coherent conversion between solid-state quantum bits and flying photonic bits along with efficient information processing and transmission for building a reliable on-chip photonic network. In addition， a single quantum dot has manipulable spin states， which can work as carriers for quantum bits. Considering the convenience of combining the fabrication process of quantum dot devices with mature semiconductor technology， device designs with quantum dots allow good scalability and integration potential.关键词：self-assembled semiconductor quantum dots;excitons;spins;optical microcavities;optical waveguides990|3299|2更新时间：2026-03-28
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Research Progress on Photocarrier Dynamics in Two-dimensional Materials and Their Heterostructures 增强出版 AI导读
“介绍了二维材料及其异质结构在光电子技术领域的研究进展，专家利用超快激光技术揭示了载流子动力学过程，为下一代光电子技术发展提供了重要参考。”摘要：Due to their unique structures and excellent optoelectronic properties， two-dimensional （2D） materials and their heterostructures are promising materials for the next generation optoelectronic technology. The dynamic properties of photocarriers have an important influence on the optoelectronic properties of these materials. This review discusses the research progress in recent years on the photocarrier dynamics in these materials. In the time domain， transient absorption measurements of carrier thermalization， energy relaxation， exciton formation， exciton-exciton annihilation， and exciton recombination in 2D materials are discussed. In the spatial domain， high-spatial-resolution transient absorption microscopy studies of photocarrier in-plane transport properties are introduced. Furthermore， interlayer charge and energy transfer in 2D heterostructures are discussed.关键词：two-dimensional material;transient absorption;carrier dynamics;ultrafast laser2778|2254|1更新时间：2026-03-28 - “介绍了其在发光显示和太阳能电池领域的研究进展，相关专家利用磁光电综合手段探索了有机和钙钛矿材料的激发态动力学过程，为开发更先进的光电器件奠定了基础。”摘要：Currently， organic and perovskite materials have been widely used in fields such as luminescent displays and solar cells. To better understand the characteristics of these materials and optimize their performance， researchers need to have a thorough understanding of their excited state dynamics. Therefore， the use of magneto-opto-electronic comprehensive methods has become an important way to study these materials. Through these methods， the excited state dynamics of organic and perovskite materials can be accurately characterized， and detailed structural features such as electron-hole separation processes and intramolecular polarization can be obtained. In addition， these methods can also study the magneto-optical properties and electrical properties of materials， thereby providing support for interdisciplinary research on these materials. This article combines the author's research work to elaborate on the relevant research on nonlinear luminescent films and photovoltaic devices based on perovskite and organic materials using magneto-opto-electronic research methods. We can better understand the performance and characteristics of these materials and lay the foundation for the development of more advanced optoelectronic devices based on these studies.关键词：organic;perovskites;magneto-opto-electronic;interdisciplinary561|650|2更新时间：2026-03-28
- “蓝光OLED材料是电致发光领域的关键和难点。基于高能激发态转换的“热激子”材料表现出优异蓝光材料的潜能。专家通过调节给受体的推拉电子能力，以蒽为核心构筑单元、三苯基苯为弱给体、苯氰基为受体，设计合成了一种新型D⁃π⁃A结构分子TACN。”摘要：The blue OLED material plays a vital role in the field of electroluminescence. Based on high-energy excited state transition， the “hot exciton” materials show the potential of excellent blue light emitting. We designed and synthesized a novel D-π-A structure molecule TACN using anthracene as the core building unit， triphenylbenzene as the weak donor and phenylcyanogen as the acceptor by adjusting the ability of pushing and pulling electrons. Distorted triphenylbenzene provides a highly distorted molecular conformation， which effectively attenuates the quenching effect in the aggregated state. Therefore， TACN exhibits a high fluorescence quantum yield （47% in the aggregated state）. The experimental results and theoretical analysis show that TACN has the “hot exciton” characteristic， and its large T2-T1 gap （1.45 eV） effectively hinders the internal conversion （IC） process from T2 to T1， while its small T2-S1 energy difference （0.18 eV， T2> S1） facilitates the reverse intersystem crossing （RISC） process. Non-doped devices based on TACN exhibit dark blue emission （λmax= 444 nm）， full width at half maximum （FWHM） of 59 nm， and color coordinates of （0.17， 0.13）. Its maximum external quantum efficiency （EQEmax） is 8.3% and corresponding exciton utilization （EUE） is up to 88.7%.关键词：organic light emitting diodes;hot exciton;blue emitter;anthracene;reverse intersystem crossing959|1398|1更新时间：2026-03-28
- “针对铜、金等金属材料加工需求，研究团队开展了500 W光纤耦合输出蓝光半导体激光加工光源研究。基于平面窗口TO封装的蓝光半导体激光单管器件，设计采用长后工作距的快轴准直镜和慢轴准直镜分别准直，获得低发散角、高光束质量的单元准直光束；结合二维空间合束、偏振合束和光纤耦合，将144个蓝光单管器件耦合进200 μm/NA 0.22光纤，通过ZEMAX软件对半导体激光光路进行光线追踪模拟；并从实验上实现，3 A电流驱动下，200 μm/NA 0.22光纤输出连续功率523 W，电光转换效率29 %。该激光光源具有直接加工铜、金等材料的能力，为金属材料加工领域提供了新的解决方案。”摘要：Aiming at the current requirement for processing of pure copper， pure gold and other metal materials， a fiber coupled blue diode laser source with continuous output power up to 500 W was fabricated. According to the ray paths simulation of diode laser by ZEMAX， the experiment of high-power blue diode laser source for material processing was carried out. In the experiment， a TO packaged blue laser diode single emitter was adopted as the emitting unit. Due to the TO packaged structure with flat output window mirror， it was designed for fast and slow axis collimator with longer back working distance to obtain collimating beam with low divergence angle and high beam quality. The beam of 144 single-tube blue diode laser devices were combined by space and polarization combination to couple into a 200 μm/NA 0.2 fiber. Under the cooling with industrial water， the output power of 523 W and the wall-plug efficiency of 29% for blue diode laser source were demonstrated from the 200 μm/NA 0.2 fiber at the 3 A drive current. The laser light source had the potential application in non-ferrous metal processing.关键词：blue diode laser;fiber-coupled;laser beam combination;laser processing source559|1545|0更新时间：2026-03-28
- “介绍了其在蓝色量子点发光二极管领域的研究进展，相关专家探索了通过掺杂二维材料碳化钛提升PEDOT∶PSS电导率的课题，为解决蓝色QLEDs空穴注入效率低问题提供了有效方案。”摘要：Low hole injection efficiency is a key factor limiting the performance of blue quantum dot light-emitting diodes （QLEDs）. Improving the conductivity of PEDOT∶PSS to increase the hole injection efficiency of devices is of great importance for improving the performance of blue QLEDs.Because of the high conductivity， abundant surface functional groups， and good hydrophilicity of the two-dimensional material titanium carbide （Ti3C2Tx）， the conductivity of PEDOT∶PSS could be improved by using exfoliated Ti3C2Tx dopant. Here， the HCl/LiF etching method was employed to prepare single-layer Ti3C2Tx nanosheets and dope into PEDOT∶PSS for the fabrication of blue QLEDs devices. As a result， the blue QLEDs device using PEDOT∶PSS-0.1%Ti3C2Tx thin film as the hole injection layer presented the EQE and current efficiency of 15.2% and 14.42 cd·A-1， respectively. Compared to the value of a reference device of 9.09% and 7.68 cd·A-1， an great improvement of 67% and 87% were achieved， respectively. Ti3C2Tx nanosheets play a dual role in enhancing the performance of blue QLEDs. The Ti3C2Tx nanosheets induce a conformational change of PEDOT from a benzoid state to a quinoid state， forming densely packed large-sized PEDOT nanocrystals and connecting these conductive nanocrystals to construct new charge transfer pathways， which increase the conductivity of the composite layer. In addition， Ti3C2Tx doping realizes the work function regulation of PEDOT∶PSS， improving the hole injection efficiency of blue QLED devices.关键词：Ti3C2Tx nanosheets;blue light-emitting diode;hole injection;energy level regulation447|647|0更新时间：2026-03-28
- “力致发光材料在力学传感领域应用广泛，但现有材料种类有限。专家开发了新型混合阴离子型力致发光材料Ba2Gd（BO3）2Cl∶Ln，探究了其光致发光性能与载流子跃迁过程，为解释混合价态材料的力致发光机制提供了思路，拓展了力致发光的应用范围。”摘要：Mechanoluminescent （ML） materials show unique energy conversion features from mechanical stimulation to photon emission， making them widely used in mechanical sensing fields such as structural health diagnosis， information anti-counterfeiting， bioengineering， and electronic skins. However， the species of reported ML materials are rare and the understanding on the ML-related charge carrier transportation is insufficient， which significantly limits its development and application. In this work， novel mixed-anion typed ML materials namely Ba2Gd（BO3）2Cl∶Ln （Ln=Eu， Tb， Dy， Sm， Nd） were developed， and the charge carrier transportation processes involved in photoluminescence （PL） and ML were examined. The crystal structure， morphology， PL/ML properties and mechanism of the samples were studied by X-ray diffraction， scanning electronic microscopy， and steady-state and transient spectral techniques under multi-mode excitation. The experimental results indicated that the emissions of Ba2Gd（BO3）2Cl∶Eu were peaked at 536， 594， 613， 625， 654， 695，710 nm under 280 nm excitation. The first broad emission and other sharp ones were assigned to Eu2+ and Eu3+， respectively， showing a mixed valence states of doped Eu ions. Interestingly， the Ba2Gd（BO3）2Cl∶Eu almost exhibited orange emission from Eu3+ under mechanical stimulation， which may be attributed to the preferential excitation of valence band electrons in the host under stress. This study also showed that the optimal doping Eu concentrations in Ba2Gd（BO3）2Cl for PL and ML were both at 2%， and the mechanoluminescent intensity was linearly related to the impact energy in the range of 0.23-1.55 mJ. By changing the type of doped lanthanide， we expanded the wavelengths of ML from visible to near infrared region. This work may provide a new way to understand the mechanism of ML in phosphors including mixed valence states and the materials presented in this work show promoting applications in the field of advanced stress sensing.关键词：mechanoluminescence;rare earth doped luminescent materials;mixed-anion compound;energy transfer;mechanoluminescent mechanism633|454|1更新时间：2026-03-28
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