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Trialkylsilyl-thiophene-conjugated acceptor for efficient organic solar cells compatible with spin-coating and blade-coating technologies

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Science China Chemistry 2024年

作者： Tengfei Li Qiang Wu Zefan Yao hairui bai Wenyan Su Rui Sun Lingxiao Tang Zhaozhao Bi Xiaojun Li Weiguo Zhu Jie Min Qunping Fan Wei Ma State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University College of Chemistry and Molecular Engineering Peking University School of Materials Science and Engineering Xi'an University of Science and Technology Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications School of Materials Science and Engineering and Changzhou University The Institute for Advanced Studies Wuhan University Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences

Sidechain engineering as an efficient and convenient strategy has been widely used to optimize molecular structure of photovoltaic materials for boosting power conversion efficiency(PCE) of organic solar cells(OSCs). Herein, a new Y-series acceptor named Y-ThSi with trialkylsilyl-substituted thiophene as conjugated sidechain is developed. Compared with its parental Y6 with multiple intermolecular interactions, Y-ThSi has a unitary molecular packing due to the additional steric hindrance from twodimensional(2D)-conjugated trialkylsilyl-thiophene. Therefore, Y-ThSi shows an obviously blue-shifted absorption with an onset of ～850 nm but significantly up-shifted lowest unoccupied molecular orbital energy level. For the PM6:Y-ThSi pair, the spin-coating OSCs achieve a decent PCE of 14.56% with an impressively high photovoltage(VOC) of 0.936 V. Inspired by its high VOCand narrow absorption, Y-ThSi is introduced into near-infrared absorbing binary PM6:BTP-eC9 host to construct ternary OSCs. Thanks to the complementary absorption, optimized morphology, and minimized energy loss properties, the PM6:BTP-eC9:Y-ThSi-based OSCs offer a higher PCE of 18.34%. Moreover, our developed strategy can overcome the commonly existed PCE drop when the blade-coating towards large-scale printing is used instead. Therefore, a comparable PCE of 18.34% is achieved, which is one of the best values for the blade-coating OSCs so far.

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Effect of operational and geometric parameters on the hydrodynamics of a Wurster coater:A CFD-DEM study

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Particuology 2024年第2期85卷 62-76页

作者： Yinqiang Song Tuo Zhou Ruiqi bai Man Zhang hairui Yang Department of Energy and Power Engineering Tsinghua UniversityBeijing100084China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua UniversityBeijing100084China State Key Laboratory of Power System and Generation Equipment Tsinghua UniversityBeijing100084China

A coupled CFD-DEM method was used to study the hydrodynamics of a Wurster coater.Firstly,the CFD part of the model was validated by the accurate prediction of the pressure drops over a pseudo-2D fluidized bed under various gas velocities.The effect of gas velocity,gap height,tube length and batch volume of the particles on the cycle time and the residence time of the particles was thoroughly investigated.The central jet gas velocity ui was found to speed up the particle cycle but undermine the coating efficiency.The gas velocity at the horizontal transport zone u2 was able to promote the horizontal transport of the particles but should not be too high,otherwise,it would obstruct the normal falling back of the particles in the downward zone.Big gap heights would decrease the coating efficiency but tube length had little impact on that.The increment of batch volume would commonly abase the cycle time and the working efficiency under a given u1.The de-fluidization problem arose when the batch volume increased to 550 mL.However,this problem could be swept out by the optimization of u1 and u2.In a mixture of different sizes,the coarse particles enjoyed higher coating efficiency and could travel closer to the nozzles.This may shield the fine particles from getting enough coating liquids,and thus coarse particles and fine particles were not recommended to get coated in the same batch.

关键词： Numerical simulation CFD-DEM Wurster coater Hydrodynamics Cycle time Residence time

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Excellent energy storage performance of niobate-based glass-ceramics via introduction of nucleating agent

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Journal of Materiomics 2022年第4期8卷 763-771页

作者： Changshuai Liu Shufeng Xie hairui bai Fei Yan Tongtong Fu Bo Shen Jiwei Zhai Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Functional Materials Research LaboratorySchool of Materials Science and EngineeringTongji UniversityShanghai201804China

For glass-ceramics, how to realize the collaborative optimization of BDS and permittivity is the key toimprove the energy storage density. In this work, ZrO2 is introduced into BPKNAS glass-ceramics asnucleating agent to promote crystal development of glass-ceramics and then achieve high permittivity.When 1.5 mol% ZrO2 is added, the glass-ceramics have the highest permittivity (~128.59) and meanwhilepossess high BDS (1948.90 kV/cm) due to the dense microstructure. Therefore, BPKNAS-1.5ZrO2 glass-ceramics has the highest theoretical energy storage density (21.62 J/cm3). Moreover, the permittivityvariation of BPKNAS-1.5ZrO2 glass-ceramics is less than 6 % in the wide temperature range from 80 to300 C, showing excellent temperature stability. In addition, BPKNAS-1.5ZrO2 glass-ceramics possessesultrahigh power density, which reaches up to 382.40 MW/cm3 in overdamped circuit. The above evi-dence shows that BPKNAS-1.5ZrO2 glass-ceramics with ultrahigh energy storage density and powerdensity is very competitive in the field of energy storage applications.

关键词： Glass-ceramics Nucleating agent Permittivity Energy storage density

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Green‑Solvent Processed Blade‑Coating Organic Solar Cells with an Efficiency Approaching 19%Enabled by Alkyl‑Tailored Acceptors

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Nano-Micro Letters 2023年第12期15卷 449-462页

作者： hairui bai Ruijie Ma Wenyan Su Top Archie Dela Pea Tengfei Li Lingxiao Tang Jie Yang Bin Hu Yilin Wang Zhaozhao Bi Yueling Su Qi Wei Qiang Wu Yuwei Duan Yuxiang Li Jiaying Wu Zicheng Ding Xunfan Liao Yinjuan Huang Chao Gao Guanghao Lu Mingjie Li Weiguo Zhu Gang Li Qunping Fan Wei Ma State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Jiangsu Engineering Research Center of Light‑Electricity‑Heat Energy‑Converting Materials and Applications School of Materials Science and EngineeringChangzhou UniversityChangzhou 213164People’s Republic of China Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education/National Engineering Research Center for Carbohydrate Synthesis Jiangxi Normal University99 Ziyang AvenueNanchang 330022People’s Republic of China Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityKowloon 999077Hong KongPeople’s Republic of China School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an 710054People’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloon 999077Hong KongPeople’s Republic of China Advanced Materials Thrust Function HubThe Hong Kong University of Science and TechnologyNanshaGuangzhouPeople’s Republic of China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an 710054People’s Republic of China Xi’an Key Laboratory of Liquid Crystal and Organic Photovoltaic Materials State Key Laboratory of Fluorine&Nitrogen ChemicalsXi’an Modern Chemistry Research InstituteXi’an 710065People’s Republic of China

Power-conversion-efficiencies(PCEs)of organic solar cells(OSCs)in laboratory,normally processed by spin-coating technology with toxic halogenated solvents,have reached over 19%.However,there is usually a marked PCE drop when the bladecoating and/or green-solvents toward large-scale printing are used instead,which hampers the practical development of OSCs.Here,a new series of N-alkyl-tailored small molecule acceptors named YR-SeNF with a same molecular main backbone are developed by combining selenium-fused central-core and naphthalene-fused endgroup.Thanks to the N-alkyl engineering,NIR-absorbing YR-SeNF series show different crystallinity,packing patterns,and miscibility with polymeric donor.The studies exhibit that the molecular packing,crystallinity,and vertical distribution of active layer morphologies are well optimized by introducing newly designed guest acceptor associated with tailored N-alkyl chains,providing the improved charge transfer dynamics and stability for the PM6:L8-BO:YRSeNF-based OSCs.As a result,a record-high PCE approaching 19%is achieved in the blade-coating OSCs fabricated from a greensolvent o-xylene with high-boiling point.Notably,ternary OSCs offer robust operating stability under maximum-power-point tracking and well-keep>80%of the initial PCEs for even over 400 h.Our alkyl-tailored guest acceptor strategy provides a unique approach to develop green-solvent and blade-coating processed high-efficiency and operating stable OSCs,which paves a way for industrial development.

关键词： Alkyl-tailored guest acceptors Blade-coating Green solvent processing Stability Organic solar cells

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Nanoparticles with rough surface improve the therapeutic effect of photothermal immunotherapy against melanoma

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Acta Pharmaceutica Sinica B 2022年第6期12卷 2934-2949页

作者： Jiao Xue Yining Zhu Shuting bai Chunting He Guangsheng Du Yuandong Zhang Yao Zhong Wenfei Chen hairui Wang Xun Sun Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Photothermal therapy has been intensively investigated for treating cancer in recent years.However,the long-term therapeutic outcome remains unsatisfying due to the frequently occurred metastasis and recurrence.To address this challenge,immunotherapy has been combined with photothermal therapy to activate anti-tumor immunity and relieve the immunosuppressive microenvironment within tumor sites.Here,we engineered silica-based core-shell nanoparticles(JQ-1@PSNs-R),in which silica cores were coated with the photothermal agent polydopamine,and a bromodomain-containing protein 4(BRD4) inhibitor JQ-1 was loaded in the polydopamine layer to combine photo thermal and immune therapy for tumor elimination.Importantly,to improve the therapeutic effect,we increased the surface roughness of the nanoparticles by hydrofluoric acid(HF) etching during the fabrication process,and found that the internalization of JQ-1@PSNs-R was significantly improved,leading to a strengthened photothermal killing effect as well as the increased intracellular delivery of JQ-1.In the animal studies,the multifunctional nanoparticles with rough surfaces effectively eradicated melanoma via photothermal therapy,successfully activated tumor-specific immune responses against residual tumor cells,and further prevented tumor metastasis and recurrence.Our results indicated that JQ-1@PSNs-R could serve as an innovative and effective strategy for combined cancer therapy.

关键词： Photothermal therapy Immunotherapy Rough surface Polydopamine-coated silica nanoparticles JQ-1 Melanoma

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Design of high-performance molybdenum alloys via doping metal oxide and carbide strengthening:A review

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Journal of Materials Science & Technology 2023年第29期160卷 161-180页

作者： hairui Xing Ping Hu Chaojun He Xiangyang Zhang Jiayu Han Fan Yang Run bai Wen Zhang Kuaishe Wang Alex AVolinsky School of Metallurgy Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China Northwest Institute for Non-ferrous Metal Research Xi’an 710016China Department of Mechanical Engineering University of South Florid14202 E.Fowler Ave.ENG 030Tamp1FL 33620USA

Metal oxide and carbide strengthening molybdenum(Mo)alloys have been designed as promising ad-vanced materials in refractory metals to solve some of the core engineering problems in superalloy ap-plications.Hence,there is a need to summarize the results obtained and evaluate the opportunities for preparing high-performance Mo alloys by strengthening metal oxides and carbides to improve the per-formance characteristics of Mo metal materials.This paper reviews the results of the reported work con-cerning the structure and properties of Mo alloys with different metal oxide and carbide strengthening methods added to Mo matrix.The influence of the doping of La 2 O 3 and Y 2 O 3 particles,ceramic Al 2 O 3 and ZrO 2 particles,and refractory TiC and ZrC carbides particles of Mo alloys are discussed.The impacts of particle morphology,size,distribution and volume fractions of oxide and carbide are analyzed,as well as the specific features of different doping techniques for obtaining high-performance Mo alloys mate-rials.This work will guide future research on the design of high-performance refractory Mo alloys by adding oxides and carbide particles,helping to solve the core issues in the field of superalloy application research.

关键词： Molybdenum alloy Metal oxide and carbide addition Oxide dispersion-strengthened Carbide precipitation-strengthened Microstructure Mechanical properties

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Single-shot AAV-vectored vaccine against SARS-CoV-2 with fast and long-lasting immunity

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Acta Pharmaceutica Sinica B 2023年第5期13卷 2219-2233页

作者： Fuhua Wu Shuang Luo Yongshun Zhang Yangsen Ou hairui Wang Zhaofei Guo Chunting He Shuting bai Penghui He Min Jiang Xiaoyan Chen Guangsheng Du Xun Sun Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Due to the insufficient long-term protection and significant efficacy reduction to new variants of current COVID-19 vaccines,the epidemic prevention and control are still challenging.Here,we employ a capsid and antigen structure engineering(CASE)strategy to manufacture an adenoassociated viral serotype 6-based vaccine(S663V-RBD),which expresses trimeric receptor binding domain(RBD)of spike protein fused with a biological adjuvant RS09.Impressively,the engineered S663V-RBD could rapidly induce a satisfactory RBD-specific IgG titer within 2 weeks and maintain the titer for more than 4 months.Compared to the licensed BBIBP-CorV(Sinopharm,China),a single-dose S663V-RBD induced more endurable and robust immune responses in mice and elicited superior neutralizing antibodies against three typical SARS-CoV-2 pseudoviruses including wild type,C.37(Lambda)and B.1.617.2(Delta).More interestingly,the intramuscular injection of S663V-RBD could overcome pre-existing immunity against the capsid.Given its effectiveness,the CASE-based S663VRBD may provide a new solution for the current and next pandemic.

关键词： AAV vectors Capsid engineering Vaccine Antigen structure design SARS-CoV-2

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2023年新型光电半导体材料热点回眸

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科技导报 2024年第1期42卷 188-203页

作者：马伟凡群平刘宇航闫晗周科王艺林赵超毕召召吴强王炳俊白海瑞西安交通大学金属材料强度国家重点实验室

第三代光电半导体具有可溶液低成本加工，透明轻薄，柔韧性好，可大面积成膜以及具有光电响应和离子传输能力等独特优势。聚焦此类半导体材料所制备的器件，回顾了有机光伏以及有机/无机杂化钙钛矿光伏的最新进展，探讨了其在柔性自供... 详细信息

第三代光电半导体具有可溶液低成本加工，透明轻薄，柔韧性好，可大面积成膜以及具有光电响应和离子传输能力等独特优势。聚焦此类半导体材料所制备的器件，回顾了有机光伏以及有机/无机杂化钙钛矿光伏的最新进展，探讨了其在柔性自供电、建筑光伏一体化等应用场景下的显著优势，讨论了第三代发光器件在材料选择和结构设计等方面的发展及其在照明和显示领域的应用前景；盘点了第三代半导体材料在人工光电突触方面的最新进展，主要聚焦于新机理、新器件结构、新功能，同时介绍了人工突触器件在感存算一体芯片、神经网络、智能仿生器件方面的最新应用。凝练了该领域所面临的重点科学问题，并展望了未来的科研及应用趋势。

关键词：第三代光电半导体有机光伏钙钛矿光伏第三代发光器件人工光电突触

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基于无人机的光伏电站智能巡检

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红外技术 2022年第5期44卷 537-542页

作者：王浩闫号叶海瑞柏嵩李艺达国家电投集团江苏电力有限公司江苏南京210000 南京航空航天大学机电学院江苏南京210000 国家电投集团江苏新能源有限公司江苏盐城224000

太阳能光伏发电是国家能源结构性调整的重要组成部分,近几年随着光伏发电产业规模迅速扩张,光伏电站的日常运维压力日益增加。针对光伏电站面积大、人工检测效率低等问题,文章对基于无人机的光伏电站智能巡检技术进行研究,提出了一个基... 详细信息

太阳能光伏发电是国家能源结构性调整的重要组成部分,近几年随着光伏发电产业规模迅速扩张,光伏电站的日常运维压力日益增加。针对光伏电站面积大、人工检测效率低等问题,文章对基于无人机的光伏电站智能巡检技术进行研究,提出了一个基于无人机的光伏电站智能巡检完整技术路线,实现了光伏面板图像数据自动化采集与分析,并对基于计算机视觉的缺陷检测方法进行研究,采用自适应动态阈值法并结合图像增强技术,基于红外图像实现了鲁棒的光伏面板缺陷检测,结合可见光数据实现缺陷类型判别,进一步根据相机POS数据及相机模型解算缺陷坐标,实现缺陷定位,并在实际场景中验证了所提出技术路线的有效性。

关键词：无人机光伏电站缺陷检测智能巡检

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轧制Mo-14%Re合金的显微组织和室温拉伸性能

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稀有金属材料与工程 2023年第8期52卷 2746-2756页

作者：何朝军胡平邢海瑞杨帆张向阳林小辉华兴江白润张文王快社西安建筑科技大学冶金工程学院陕西西安710055 西安建筑科技大学功能材料加工国家地方联合工程研究中心陕西西安710055 西北有色金属研究院陕西西安710016

为了进一步了解轧制Mo-14%Re合金的显微组织和室温拉伸性能,采用扫描电镜(SEM)和高分辨电子背散射衍射(EBSD)研究了轧制Mo-14%Re合金的显微组织和断口形貌。采用Channel 5软件分析了轧制Mo-14%Re合金在不同退火温度下的组织演变。结果表... 详细信息

为了进一步了解轧制Mo-14%Re合金的显微组织和室温拉伸性能,采用扫描电镜(SEM)和高分辨电子背散射衍射(EBSD)研究了轧制Mo-14%Re合金的显微组织和断口形貌。采用Channel 5软件分析了轧制Mo-14%Re合金在不同退火温度下的组织演变。结果表明,随着退火温度的升高,Mo基体相和ReO_(3)相的施密特因子逐渐减小。织构强度迅速增加,极图上的晶体取向强度从6.51增加到10.18。轧制Mo-14%Re合金的初始再结晶发生在1100℃,在此退火温度下,合金中富稀土ReO_(3)相均匀析出,导致拉伸过程中应力分布均匀,Mo基体相和ReO_(3)相表现出明显的晶体取向,ReO_(3)相晶界主要为大角度晶界,使得断后伸长率达到最大值33.5%。拉伸断裂的韧窝数量最多且最大。此外,还研究了断裂过程中微孔的形成、聚集、生长和裂纹扩展。

关键词： Mo-14%Re合金室温拉伸初始再结晶微观结构演化裂纹扩展

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