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Highly efficient solution-processed organic photovoltaics enabled by improving packing behavior of organic semiconductors

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Science China Chemistry 2024年第3期67卷 890-897页

作者： Xinyue Cui Hongxiang Li Hao lu Yuqiang Liu Guangliu Ran Rui Liu Huarui Zhang Xueqing Ma Dawei Li Yi Lin Jifa Yu Wenkai Zhang Lei Cai Yahui Liu Pei Cheng Andong Zhang Zaifei Ma guanghao lu Zhishan Bo College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao 266071China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing 100875China Shandong Province Key Laboratory of Medical Physics and Image Processing Technology School of Physics and ElectronicsShandong Normal UniversityJinan 250014China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an 710054China

Solution processability is a unique property of organic semiconductors. The compact and regular π-π stacking between molecules is paramount in the performance of organic optoelectronic devices. However, it is still a challenge to improve their stacking quality without sacrificing the solution-processability from the aspect of materials design. Here, delicately engineered additives are presented to promote the formation of ordered aggregation of conjugated molecules by regulating their nucleation and growth dynamics. Intriguingly, the long-chain BTP-eC9-4F molecules can realize ordered aggregation comparable to short-chain ones without sacrificing processability. The domain size of BTP-eC9-4F aggregation is enlarged from 24.2 to 32.2 nm in blend films.Thereby exciton diffusion and charge transport become faster, contributing to the suppression of recombination losses. As a result, a power conversion efficiency of 19.2% is achieved in D18:BTP-eC9-4F based organic photovoltaics. Our findings demonstrate a facile strategy to improve the packing quality of solution-processed organic semiconductors for high-efficiency photovoltaics and beyond photovoltaics.

关键词： organic semiconductor organic photovoltaic charge transport solution processability

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Semitransparent Flexible Organic Solar Cells

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Chemical Research in Chinese Universities 2020年第3期36卷 343-350页

作者： WANG Yuhcng CHANG Yilin ZHANG Jianqi lu guanghao WEI Zhixiang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190P.R.China Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an 710054P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

The semitransparent flexible organic solar cell takes advantages of flexibility,transparency,color adjust ment property,which is more conducive to integrate on buidings and mobile terminals.Ascribing to the developments of narrow band gap donors and the new non-fullerene acceptors,the power conversion efficiency of semitransparent flexible organic solar cells has been achieved 10% to 12% with average visible transmittance of 17% to 21%.This review summarizes the molecular design of the most representative layer materials,and discusses the characterization of semitransparent parameters paradigms,then we discuss how to optimize the device in combination with optical simulation,and finally list the recent development of semitransparent flexible electrodes of ITO-free organic solar cells,and give our perspectives on the next step direction.

关键词： Semitransparent Flexible Organic solar cell Electrode Optical simulation

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基于自适应窗口与压缩幅值的瞬时转频估计

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噪声与振动控制 2024年第1期44卷 134-141页

作者：王贡献卢广浩胡志辉付泽武汉理工大学交通与物流工程学院武汉430063

针对变转速工况下轴承信号的时频分布能量发散、噪声和谐波干扰强导致其转频难以获取的问题,提出一种基于自适应窗口和压缩幅值的瞬时转频估计方法。首先,通过自适应窗口在频率轴方向搜索出脊线窗口避免噪声和谐波的干扰;其次,在脊线窗... 详细信息

针对变转速工况下轴承信号的时频分布能量发散、噪声和谐波干扰强导致其转频难以获取的问题,提出一种基于自适应窗口和压缩幅值的瞬时转频估计方法。首先,通过自适应窗口在频率轴方向搜索出脊线窗口避免噪声和谐波的干扰;其次,在脊线窗口内用压缩幅值方法集中发散的脊线能量;然后,用惩罚函数法提取脊线,实现转频的精确估计;最后,根据采用轴承实验台收集的数据验证了所提出方法的有效性和鲁棒性。结果表明,相比于传统方法,采用所提方法估计瞬时转动频率使误差降低约8%。

关键词：故障诊断脊线提取滚动轴承变转速自适应窗口转频估计压缩幅值

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农业科研院所管理岗位绩效考核指标体系研究

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中国农业科技导报 2024年第5期26卷 11-19页

作者：崔广浩陈智芳陆建中中国农业科学院农田灌溉研究所河南新乡453002 中国农业科学院饲料研究所北京100081

管理岗位是农业科研院所不可或缺的重要力量,对农业科技创新和发展有着重要的推动作用。针对当前农业科研院所管理岗位绩效考核的现实需求,在系统梳理国家相关政策和科研院所管理工作要求的基础上,基于农业科研院所性质和工作内容,采用... 详细信息

管理岗位是农业科研院所不可或缺的重要力量,对农业科技创新和发展有着重要的推动作用。针对当前农业科研院所管理岗位绩效考核的现实需求,在系统梳理国家相关政策和科研院所管理工作要求的基础上,基于农业科研院所性质和工作内容,采用系统分析、专家访谈等方式,确定农业科研院所管理岗位绩效考核关键指标,验证了各级指标的重要性和专家意见集中度,构建出包含4项一级指标、13项二级指标、25项三级指标的农业科研院所管理岗位绩效量化考核指标体系。在此基础上,采用层次分析法、问卷调查等方法确定指标体系权重,为农业科研院所制定管理岗位绩效评价和相关政策提供有效的借鉴和参考。

关键词：农业科研院所管理岗位绩效管理量化考核指标体系

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Delaying application time of slow-release fertilizer increases soil rhizosphere nitrogen content,root activity,and grain yield of spring maize

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The Crop Journal 2022年第6期10卷 1798-1806页

作者： guanghao Li Pengxiao Fu Guigen Cheng Weiping lu Dalei lu Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009JiangsuChina Joint International Research Laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009JiangsuChina

Application of slow-release fertilizer(SF)is a nutrient-management measure aimed at improving maize nutrient use and yield and saving labor cost.One-time application of SF at sowing usually results in nutrient deficiency during the post-silking stage,owing to the long growth period of spring maize.This study was conducted to investigate the effects on spring maize of SF application stage(zero,three-,and six-leaf stages,designated as SF0,SF3,and SF6,respectively)on grain yield,total soil rhizosphere nitrogen(N)content,and root activity,in comparison with the conventional fertilization mode(CF,application of compound fertilizer at sowing time,and topdressing urea at six-leaf and tasseling stages)at the same fertilization level as the control.Compared with no fertilization(F0)and CF,SF increased grain number and weight.The maize cultivars Suyu 30(SY30)and Jiangyu 877(JY877)produced the highest grain yield and net return under SF6 treatment over the three years.SF6 increased enzymatic activities including oxidoreductase,hydrolase,transferase,and lyase in rhizosphere soil at silking(R1)and milking stages(R3).SF6 increased the total N contents of rhizosphere soil by 7.1%at R1 and 9.2%R3 stages compared with SF0.The activities of antioxidant enzymes in roots were increased under SF6 treatments at R1and R3.The mean root activities of SF0,SF3,and SF6 increased by 7.1%,12.8%,and 20.5%compared with CF at R1 and by 8.8%,13.0%,and 23.5%at R3.Delaying the application time of SF could increase grain yield by increasing total N content of rhizosphere soil,delaying root senescence,and increasing root activity at the late reproductive stage.Applying SF at the six-leaf stage is recommended as an effective fertilization strategy for the sustainable production of spring maize in southern China.

关键词： Spring maize Slow-release fertilizer Fertilization stage Root activity Grain yield

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铝合金发动机端盖压铸数值模拟与工艺优化

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特种铸造及有色合金 2024年第3期44卷 424-427页

作者：卢信学邓益民束学道孙宝寿李光浩宁波大学机械工程与力学学院宁波315211 浙江省零件轧制成形技术研究重点实验室宁波315211 宁波博大机械有限公司宁波315211

对铝合金发动机后端盖进行了压铸充型凝固过程数值模拟,对可能产生缩孔、缩松的部位进行预测。分析了充型、凝固过程,对冷却水道进行优化,采用正交试验优化了压铸工艺参数:浇注温度为680℃,压射速度为4 m/s,模具预热温度为220℃。用优... 详细信息

对铝合金发动机后端盖进行了压铸充型凝固过程数值模拟,对可能产生缩孔、缩松的部位进行预测。分析了充型、凝固过程,对冷却水道进行优化,采用正交试验优化了压铸工艺参数:浇注温度为680℃,压射速度为4 m/s,模具预热温度为220℃。用优化后的方案进行压铸生产和检测,结果表明压铸件品质得到显著提高。

关键词：铝合金压铸数值模拟正交试验

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自适应新小波阈值函数中子图像去噪方法

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同位素 2024年第2期37卷 153-163页

作者：逯兆虎贾少雷李广豪景士伟东北师范大学物理学院长春130024 四川省智能警务重点实验室泸州646000

中子射线照相技术是一种重要的无损检测技术,但在中子成像过程中会受到一些噪声因素的干扰,导致图像质量降低,不利于后期研究。本研究提出一种基于粒子群优化算法(particle swarm optimization,PSO)的新小波阈值函数去噪方法来降低噪声... 详细信息

中子射线照相技术是一种重要的无损检测技术,但在中子成像过程中会受到一些噪声因素的干扰,导致图像质量降低,不利于后期研究。本研究提出一种基于粒子群优化算法(particle swarm optimization,PSO)的新小波阈值函数去噪方法来降低噪声对中子图像的影响。其基本思想是将PSO算法与小波阈值函数去噪相结合。通过PSO算法寻找适合当前图像去噪的最优调节因子。Matlab软件实验的结果表明,新方法在去除高斯噪声、泊松噪声较其他四种对比方法可以明显提高噪声图像的峰值信噪比(PSNR)和降低噪声图像的均方误差(MSE),有效提高中子图像的质量。

关键词：小波阈值函数粒子群优化算法中子图像图像去噪

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箍筋类型对GFRP筋增强混凝土梁性能的影响

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广东土木与建筑 2024年第3期31卷 61-65页

作者：卢利周振周浩然陈苇麦广浩广东永和建设集团有限公司广东茂名525499 广东工业大学土木与交通工程学院广州510006

传统混凝土结构因钢筋锈蚀带来的安全问题,引起了广泛的关注。FRP筋具有轻质高强、耐腐蚀等优点,因此被建议替代混凝土结构中的钢筋。为了探究不同类型GFRP箍筋对GFRP筋混凝土梁性能的影响,对配备两种不同箍筋的GFRP筋混凝土梁分别进行... 详细信息

传统混凝土结构因钢筋锈蚀带来的安全问题,引起了广泛的关注。FRP筋具有轻质高强、耐腐蚀等优点,因此被建议替代混凝土结构中的钢筋。为了探究不同类型GFRP箍筋对GFRP筋混凝土梁性能的影响,对配备两种不同箍筋的GFRP筋混凝土梁分别进行了静力加载试验,分析了GFRP筋混凝土梁失效演化过程,讨论了箍筋类型对GFRP筋混凝土梁破坏模式、应力应变状态和荷载位移曲线的影响。最终结果表明:GFRP传统螺纹箍筋梁比GFRP管切割箍筋梁承载能力更高,传统螺纹箍筋转变为管切割箍筋时,梁破坏模式从弯曲破坏变成剪切破坏,GFRP传统螺纹箍筋梁的延性更好。

关键词： GFRP筋箍筋类型承载能力破坏模式

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Insight into the efficiency-stability-cost balanced organic solar cell based on a polymerized nonfused-ring electron acceptor

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Aggregate 2023年第6期4卷 172-179页

作者： Xiaobin Gu Yanan Wei Guanyu lu Ziyang Han Di Zheng guanghao lu Jianqi Zhang Zhixiang Wei Yunhao Cai Xin Zhang Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics EngineeringCAS Center for Excellence in Topological Quantum ComputationCAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijingChina Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’anChina CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina

Organic solar cells(OSCs)have attracted extensive attention from both academia and industry in recent years due to their remarkable improvement in power conversion efficiency(PCE).However,the Golden Triangle(the balance of efficiency-stability-cost)required for large-scale industrialization of OSCs still remains a great challenge.Here,a new nonfused-ring electron acceptor(NFREA)BF and its polymerized counterpart PBF were designed and synthesized,and their photovoltaic performance,storage stability and material cost were systematically investigated.When blended with a widely-used polymer donor PBDB-T,the PBFbased all-polymer solar cell(all-PSC)displayed a record high PCE of 12.61%for polymerized NFREAs(PNFREAs)with an excellent stability(95.2%of initial PCE after 800 h storage),superior to the BF counterpart.Impressively,PBF-based allPSC possesses the highest industrial figure-of-merit(i-FOM)value of 0.309 based on an efficiency-stability-cost evaluation,in comparison to several representative OSC systems(such as PM6:Y6 and PBDB-T:PZ1).This work provides an insight into the balance of efficiency,stability,and cost,and also indicates that the PNFREAs are promising materials toward the commercial application of OSCs.

关键词： all-polymer solar cells efﬁciency-stability-cost balance noncovalently conformational locks organic solar cell polymerized nonfused-ring electron acceptors

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Functional characterization of powdery mildew resistance gene MIIW172,a new Pm60 allele and its allelic variation in wild emmer wheat

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Journal of Genetics and Genomics 2022年第8期49卷 787-795页

作者： Qiuhong Wu Yongxing Chen Beibei Li Jing Li Panpan Zhang Jingzhong Xie Huaizhi Zhang guanghao Guo Ping lu Miaomiao Li Keyu Zhu Wenling Li Tzion Fahima Eviatar Nevo Hongjie Li Lingli Dong Zhiyong Liu State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206China Institute of Evolution and the Department of Evolutionary and Environmental Biology University of HaifaMt.CarmelHaifa 3498838Israel The National Engineering Laboratory of Crop Molecular Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Wild emmer wheat(Triticum dicoccoides,WEW)is an immediate progenitor of both the cultivated tetraploid and hexaploid wheats and it harbors rich genetic diversity against powdery mildew caused by Blumeria graminis f.***.tritici(Bgt).A powdery mildew resistance gene Ml I^(W172)originated from WEW accession I^(W172)(G-797-M)is fine mapped in a 0.048 centimorgan(c M)genetic interval on 7 AL,corresponding to a genomic region spanning 233 kb,1 Mb and 800 kb in Chinese Spring,WEW Zavitan,and T.urartu G1812,respectively.Ml I^(W172)encodes a typical NLR protein NLRI^(W172)and physically locates in an NBS-LRR gene cluster.NLRI^(W172)is subsequently identified as a new allele of Pm60,and its function is validated by EMS mutagenesis and transgenic complementation.Haplotype analysis of the Pm60 alleles reveals diversifications in sequence variation in the locus and presence and absence variations(PAV)in WEW populations.Four common single nucleotide variations(SNV)are detected between the Pm60 alleles from WEW and T.urartu,indicative of speciation divergence between the two different wheat progenitors.The newly identified Pm60 alleles and haplotypes in WEW are anticipated to be valuable for breeding powdery mildew resistance wheat cultivars via marker-assisted selection.

关键词： Blumeria graminis f.sp.tritici Triticum dicoccoides Presence and absence variation Pm60 Allelic variation

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