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An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

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Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei cheng Zhaoyang Yao Ning Li Long Ye Lijian Zuo Ke Gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

Microstructure Evolution and Mechanism of Strength Development of Fly Ash Paste

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 152-163页

作者： MA Shuzhao WU Shunchuan HUANG Mingqing cheng Haiyong JIANG Guanzhao NIU Yonghui LIU Zemin SUN Wei Faculty of Land Resources Engineering Kunming University of Science and TechnologyKunming 650093China Zijin School of Ge-ology and Mining Fuzhou UniversityFuzhou 350108China

Three types of activators such as sodium hydroxide,calcium oxide and triethanolamine(TEA)are used to establish different activation environments to address the problems associated with the process of activating fly ash *** conducted mechanical tests and numerical simulations to understand the evolution of microstructure,and used environmental scanning electron microscopy(ESEM)and energy dispersive spectroscopy(EDS)techniques to analyze the microenvironments of the *** mechanical properties of fly ash paste under different activation conditions and the changes in the microstructure and composition were *** results revealed that under conditions of low NaOH content(1%-3%),the strength of the sample increased *** the content exceeded 4%,the rate of increase in strength *** on the results,the optimal NaOH content was identified,which was about 4%.A good activation effect,especially for short-term activation(3-7 d),was achieved using TEA under high doping *** activation effect was poor for long-term strength after 28 *** CaO content did not significantly affect the degree of activation *** maximum effect was exerted when the content of CaO was 2%.The virtual cement and concrete testing laboratory(VCCTL)was used to simulate the hydration process,and the results revealed that the use of the three types of activators accelerated the formation of Ca(OH)_(2) in the *** activators also corroded the surface of the fly ash particles,resulting in a pozzolanic *** active substances in fly ash were released efficiently,and hydration was *** pores were filled with hydration products,and the microstructure changed to form a new frame of paste filling that helped improve the strength of fly ash paste.

关键词： paste filling fly ash activator unconfined compressive strength microstructure hydration simulation

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小型无人机空地数据链系统的应用研究

微处理机 2006年第3期27卷 87-89页

作者：李芸高超钟诚文牟勇飚西北工业大学翼型叶栅空气动力学国防科技重点实验室西安710072

设计了一种适用于小型无人机的空地数据链系统;文中提出了详细的系统设计方案,对数据链的传输方式、传输内容、传输流程等进行了研究;并给出了系统的软件设计和实现方法。

关键词：小型无人机数据链通信协议甚高频

Red imported fire ants(Hymenoptera:Formicidae)cover inaccessible surfaces with particles to facilitate food search and transportation

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Insect Science 2021年第6期28卷 1816-1828页

作者： chao wen Jian Chen wen-Quan Qin Xuan Chen Jia-cheng Cai Jun-Bao wen Xiu-Jun wen Cai Wang Guangdong Key Laboratory for Innovation Development and Utilization of Forest Plant Germplasm College of Forestry and Landscape ArchitectureSouth China Agricultural UniversityGuangzhou510642China Biological Control of Pests Research Unit Agricultural Research ServiceU.S.Department of AgricultureStonevilleMS 38776USA Department of Biology Salisbury UniversitySalisburyMD 21801USA Department of Mathematics and Computer Science Salisbury UniversitySalisburyMD 21801USA Beijing Key Laboratory for Forest Pest Control College of ForestryBeijing Forestry UniversityBeijing100083China

Eusocial insects have evolved diverse particle-use behaviors.A previous study reported that red imported fire ants,Solenopsis invicta Buren,deposited soil particles on substances treated with essential balm,a fire ant *** hypothesized that *** modifies inaccessible surfaces by covering them with soil particles to facilitate food search and ***,laboratory experiments were conducted to study the particle-covering behavior *** in response to viscose surfaces or surfaces treated with essential balm or liquid paraffin in the presence of real food(sausage)or non-food objects(acrylic plates).*** workers deposited significantly more soil particles on these three types of treated surfaces than on untreated *** addition,significantly more particles were relocated on viscose and parafTin-smeared surfaces in the presence of food than in the presence of non-food *** particle-covering behavior on viscose surfaces was also observed in the ***,when no soil particles were available,ants searched and transported food on viscose surfaces only if the surfaces were artificially covered with sufficient quantities of soil particles but could not do so on viscose surfaces without soil particles or with insutTicient quantities of soil *** addition,ants actively relocated particles to cover viscose surfaces if the transportation distance was within 200 mm,whereas significantly fewer particles were relocated at longer transportation distances(400 mm).Our study provides a novel example of particle use by fire ants during foraging.

关键词： eusocial insect Fomicidae foraging particle-covering behavior Solenopsis invicta

Evolution of Conformation and Dynamics of Solvents in Hydration Shell along the Urea-induced Unfolding of Ubiquitin

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Chinese Journal of Polymer Science 2019年第7期37卷 708-718页

作者： Ke-cheng Yang Feng-chao Cui Ce Shi wen-Duo Chen Yun-Qi Li Key Laboratory of Synthetic Rubber Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Smart City Research Institute Zhengzhou UniversityZhengzhou 450001China

A clear diagram for the unfolding of protein induced by denaturant is a classical but still unsolved challenge. To explore the unfolded conformations of ubiquitin under different urea concentrations, we performed hybrid Monte Carlo-molecular dynamics simulations (MC-MD) guided by small angle X-ray scattering (SAXS) structural information. Conformational ensembles sampled by the hybrid MC-MD algorithm exhibited typical 3D structures at different urea concentrations. These typical structures suggested that ubiquitin was subjected to a sequential unfolding, where the native contacts between adjacent β-sheets at first were disrupted together with the exposure of hydrophobic core, followed by the conversion of remaining β-strands and helices into random coils. Ubiquitin in 8 mol·L?1 urea is almost a random coil. With the disruption of native structure, urea molecules are enriched at protein hydrated layer to stabilize newly exposed residues. Compared with water, urea molecules prefer to form hydrogen bonds with the backbone of ubiquitin, thus occupying nodes of the hydrogen bonding network that construct the secondary structure of proteins. Meanwhile, we also found that the slow dynamics of urea molecules was almost unchanged while the dynamics of water was accelerated in the hydration shell when more residues were unfolded and exposed. The former was also responsible for the stabilization of unfolded structures.

关键词： Ubiquitin Unfolding process Hydration behavior and dynamics Water and urea

Design,fabrication,and cold test of an S-band high-gradient accelerating structure for compact proton therapy facility

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Nuclear Science and Techniques 2021年第4期32卷 38-48页

作者： Yu Zhang wen-cheng Fang Xiao-Xia Huang Jian-Hao Tan cheng Wang chao-Peng Wang Zhen-Tang Zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China ShanghaiTech University Shanghai 201210China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China

An S-band high-gradient accelerating structure is designed for a proton therapy linear accelerator(linac)to accommodate the new development of compact,singleroom facilities and ultra-high dose rate(FLASH)*** optimize the design,an efficient optimization scheme is applied to improve the simulation *** S-band accelerating structure with 2856 MHz is designed with a low beta of 0.38,which is a difficult structure to achieve for a linac accelerating proton particles from 70 to 250 MeV,as a high gradient up to 50 MV/m is required.A special design involving a dual-feed coupler eliminates the dipole field *** paper presents all the details pertaining to the design,fabrication,and cold test results of the S-band high-gradient accelerating structure.

关键词： S-band High gradient Accelerating structure Compact Single-room facility Dual-feed coupler Cold test

Effects of embedding direct reduction followed by magnetic separation on recovering titanium and iron of beach titanomagnetite concentrate

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Journal of Iron and Steel Research International 2017年第2期24卷 156-164页

作者： chao Geng Ti-chang Sun You-wen Ma cheng-yan Xu Hui-fen Yang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China

Embedding direct reduction followed by magnetic separation was conducted to fully recover iron and titanium separately from beach titanomagnetite （TTM）. The influences of reduction conditions, such as molar ratio of C to Fe, reduction time, and reduction temperature, were studied. The results showed that the TTM concentrate was reduced to iron and iron-titanium oxides, depending on the reduction time, and the reduction sequence at 1 200℃ was suggested as follows ： Fe2.75 Ti0.25O4→Fe2TiO4→FeTiO3→FeTi2O5. The reduction temperature played a considerable role in the reduction of TTM concentrates. Increasing temperature from 1 100 to 1 200℃ was beneficial to recovering titanium and iron, whereas the results deteriorated as temperature increased further. The results of X-ray diffraction and scanning electron microscopy analyses showed that low temperature （≤1100℃） was unfavorable for the gasification of reductant, resulting in insufficient reducing atmosphere in the reduction process. The molten phase was formed at high temperatures of 1250-1 300℃, which accelerated the migration rate of metallic particles and suppressed the diffusion of reduction gas, resulting in poor reduction. The optimum conditions for reducing TTM concentrate are as follows： molar ratio of C to Fe of 1.68, reduction time of 150 min, and reduction temperature of 1 200℃. Under these conditions, direct reduction iron powder, assaying 90.28 mass% TFe and 1.73 mass% TiO2 with iron recovery of 90.85%, and titanium concentrate, assaying 46.24 mass% TiO2 with TiO2 recovery of 91.15%, were obtained.

关键词： Titanomagnetite concentrate Direct reduction Reduction condition Direct reduction iron powder Magnetic separation

Wideband high gain millimeter wave antenna based on wavy power divider for millimeter wave radar sensor

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The Journal of China Universities of Posts and Telecommunications 2025年

作者： Zhang Shuanggen Yu Tao Wang Yulan Zhou Ran cheng Zhihua School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， a broadband high gain millimeter wave radar array antenna based on a wavy power divider is proposed. The radar antenna comprises a wavy power divider and a 10-element array antenna. By adjusting the wavy radius of the power divider， the surface current of the power divider is altered， resulting in better impedance matching with the antenna. This ultimately leads to a significant improvement in bandwidth performance. The 410 millimeter wave radar antenna loaded with wavy power divider exhibits an approximate enhancement of 3 GHz compared to traditional microstrip power divider antennas， and an average gain increase of 2.42 dB within the vehicle millimeter wave radar frequency band relative to the improved gradient power divider structure. The 410 millimeter wave radar antenna loaded with wavy power divider possesses the characteristics of high gain and broad bandwidth.

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Intracavity Optical Deposition of Graphene Saturable Absorber for Low-Threshold Passive Mode-Locking of a Fiber Laser

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Chinese Physics Letters 2013年第2期30卷 121-123页

作者： LUO Zhi-chao CAO wen-Jun LUO Ai-Ping XU wen-cheng Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006

A compact,intracavity optical deposition of graphene saturable absorber(SA)for low-threshold passively mode-locked fiber laser is proposed and *** optical deposition is implemented in the laser cavity by using a slot *** the fabricated graphene SA,the fiber laser achieves self-starting,passively mode-locked operation at a low threshold of 32 mW pump power,delivering a 13.1-MHz 2.36-ps pulse train.

关键词： passive fiber laser