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Journal of Energy Chemistry 2022年第3期31卷 382-389,I0011页

作者： Jiaxin Xu Hexiang Feng yuanying liang Haoran Tang Yixu Tang Zurong Du Zhicheng Hu Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640GuangdongChina

Molecular design of either polymer donors or acceptors is a promising strategy to tune the morphology of the active layer of organic solar cells,enabling a high-performance device.Thereinto,developing novel polymer donors is an alternative method to obtain high photovoltaic performance.Herein,we present a facile side-chain engineering on the dithiophenobenzotriazole(DTBTz)unit of newly-designed polymer donors(named p BDT-DTBTz-EH and p BDT-DTBTz-Me)to boost the performance of non-fullerene solar cells.Compared with p BDT-DTBTz-EH with long N-alkyl side chains,p BDT-DTBTz-Me with a short methyl exhibits stronger molecular aggregation,higher absorption coefficient,and preferred face-on orientation packing.As a consequence,p BDT-DTBTz-Me based devices achieve an optimal power conversion efficiency of 15.31%when donors are paired with the narrow bandgap acceptor Y6,which is superior to that of p BDT-DTBTz-EH based devices(9.17%).Additionally,the p BDT-DTBTz-Me based devices manifest more effective charge separation and transfer than p BDT-DTBTz-EH based devices.These results indicate that fine-tuning side chains of polymer donors provide new insights for the design of high-performance polymer donors in non-fullerene solar cells.

关键词： Non-fullerene solar cells Wide bandgap polymer donor Side-chain engineering morphology Dithienobenzotriazole

Oxoammonium enabled secondary doping of hole transporting material PEDOT:PSS for high-performance organic solar cells

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Science China Chemistry 2020年第6期63卷 802-809页

作者： Haoran Tang Zixian Liu Zhicheng Hu yuanying liang Fei Huang Yong Cao State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate(PEDOT:PSS)is one of the most widely used hole transporting materials in organic solar cells(OSCs).Multiple strategies have been adopted to improve the conductivity of PEDOT:PSS,however,effective strategy that can optimize the conductivity,work function,and surface energy simultaneously to reach a better energy alignment and interface contact is rare.Here,we demonstrate that oxoammonium salts(TEMPO^+X^-)with different counterions can act as facile and novel dopants to realize secondary doping of PEDOT:PSS.The effective charge transfer process achieved between TEMPO^+X^-and PEDOT:PSS results in enhanced carrier density and improved conductivity of PEDOT:PSS.Moreover,different counterions of TEMPO^+X^-can tune the work function and surface energy of PEDOT:PSS,enabling improved device performances.The resulting device with PM6:Y6 as the active layer shows a high power conversion efficiency(PCE)over 16%.Moreover,this doping strategy can also be applied to other conjugated polymers such as poly(3-hexylthiophene).This work provides a promising strategy to tune the properties of conjugated polymers through doping,thus effectively boosting the performance of organic solar cells.

关键词： multi-functional secondary doping PEDOT:PSS oxoammonium interface modification organic solar cells

Molecular design towards two-dimensional electron acceptors for efficient non-fullerene solar cells

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Journal of Energy Chemistry 2020年第12期29卷 190-198页

作者： Yan Liu Zixian Liu Zhicheng Hu yuanying liang Zhenfeng Wang Zhongxin Chen Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640GuangdongChina

Non-fullerene polymer solar cells(NF-PSCs) have gained wide attention recently. Molecular design of non-fullerene electron acceptors effectively promotes the photovoltaic performance of NF-PSCs. However,molecular electron acceptors with 2-dimensional(2 D) configuration and conjugation are seldom reported.Herein, we designed and synthesized a series of novel 2 D electron acceptors for efficient NF-PSCs. With rational optimization on the conjugated moieties in both vertical and horizontal direction, these 2 D electron acceptors showed appealing properties, such as good planarity, full-spectrum absorption, high absorption extinction coefficient, and proper blend morphology with donor polymer. A high PCE of 9.76%was achieved for photovoltaic devices with PBDB-T as the donor and these 2 D electron acceptors. It was also found the charge transfer between the conjugated moieties in two directions of these 2 D molecules contributes to the utilization of absorbed photos, resulting in an exceptional EQE of 87% at 730 nm. This work presents rational design guidelines of 2 D electron acceptors, which showed great promise to achieve high-performance non-fullerene polymer solar cells.

关键词： Two-dimensional molecules Perylene diimide Electron acceptors Molecular design Non-fullerene solar cells

AZ31镁合金板室温弯曲压直过程中的组织及力学性能

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热加工工艺 2024年第3期53卷 110-113页

作者：田静邓嘉飞常原颖梁伟太原理工大学材料科学与工程学院山西太原030024 太原理工大学分析测试中心山西太原030600

研究AZ31镁合金板在室温弯曲压直过程中组织演变及其对力学性能的影响。结果表明:室温弯曲压直工艺预制拉伸孪晶不仅有助于镁合金的塑性变形,对材料的强度的提升也有积极的影响。室温弯曲压直后板材产生拉伸孪晶切割晶粒,导致晶粒细化... 详细信息

研究AZ31镁合金板在室温弯曲压直过程中组织演变及其对力学性能的影响。结果表明:室温弯曲压直工艺预制拉伸孪晶不仅有助于镁合金的塑性变形,对材料的强度的提升也有积极的影响。室温弯曲压直后板材产生拉伸孪晶切割晶粒,导致晶粒细化和位错在晶界及孪晶密集处能量聚集造成位错强化,使镁合金板抗拉强度提升。同时,预制拉伸孪晶弱化基面织构可激活更多种类的滑移系统,导致室温弯曲矫直后的板材断后伸长率增加。

关键词： AZ31镁合金拉伸孪晶滑移

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粒子加速器中激光跟踪仪控制网测量精度研究

武汉大学学报（信息科学版） 2024年第1期49卷 156-166页

作者：王铜周维虎董岚梁静马娜何振强柯志勇罗涛门玲鸰王小龙李波卢尚闫路平韩圆颖中国科学院微电子研究所北京100029 中国科学院高能物理研究所北京100049 散裂中子源科学中心广东东莞523803 中国科学院大学北京100049

粒子加速器的高精度准直要求对测量技术提出很大挑战,由于激光跟踪仪具有大尺寸、高精度及三维空间测量的优势,因此需要开展激光跟踪仪对粒子加速器的测量精度研究。首先,针对激光跟踪仪的标称测量精度,介绍了激光跟踪仪标称测量精度的... 详细信息

粒子加速器的高精度准直要求对测量技术提出很大挑战,由于激光跟踪仪具有大尺寸、高精度及三维空间测量的优势,因此需要开展激光跟踪仪对粒子加速器的测量精度研究。首先,针对激光跟踪仪的标称测量精度,介绍了激光跟踪仪标称测量精度的表达方法、测试方法,对标称精度指标的计算方法进行推导,并对其具体含义进行解释,为激光跟踪仪的测量应用及数据处理提供了理论基础。然后,以直线控制网为代表开展激光跟踪仪对粒子加速器控制网的测量方法和测量精度分析,在中国散裂中子源大科学装置直线加速器进行了实际测量,采用激光跟踪仪分两组在同一时间内进行观测,通过对控制网单组的平差精度以及两组的坐标对比分析,全面准确地评价其测量精度,发现200 m长直线控制网点位横向最弱精度优于0.2 mm。同时,以导线网为简化模型对直线控制网的精度进行理论估算,发现直线控制网中部点位横向精度与控制网长度的三次方开根号成正比,从而可快速推算出其他规模的直线控制网的的测量精度,为陆续建设的粒子加速器的准直精度分析以及准直方案决策提供指导。

关键词：粒子加速器准直激光跟踪仪标称精度控制网精度分析精度估计

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欧李果浆对失眠小鼠的改善作用及机制

食品科学 2023年第21期44卷 151-158页

作者：傅娆梁哲温馨倪元颖中国农业大学食品科学与营养工程学院国家果蔬加工工程技术研究中心农业农村部果蔬加工重点实验室北京100083

本研究对‘农大4号’‘农大7号’和‘燕山2号’欧李果浆进行体外模拟消化实验,选取γ-氨基丁酸(γ-aminobutyric acid,GABA)含量最高的‘农大4号’欧李果浆作为受试物,通过急性毒性试验、高架十字迷宫实验、戊巴比妥钠诱导下小鼠直接睡... 详细信息

本研究对‘农大4号’‘农大7号’和‘燕山2号’欧李果浆进行体外模拟消化实验,选取γ-氨基丁酸(γ-aminobutyric acid,GABA)含量最高的‘农大4号’欧李果浆作为受试物,通过急性毒性试验、高架十字迷宫实验、戊巴比妥钠诱导下小鼠直接睡眠实验、睡眠时间延长实验以及巴比妥钠诱导下小鼠的睡眠潜伏期实验,探究欧李果浆对小鼠睡眠行为的改善作用。结果表明,灌胃800 mg/kg mb欧李果浆能够显著延长失眠小鼠的睡眠时长(P<0.05),提高小鼠入睡率,缩短睡眠潜伏期,且其改善作用可能与下调血清促炎因子水平和调节下丘脑-垂体-肾上腺轴功能有关。

关键词：欧李 γ-氨基丁酸改善睡眠缓解焦虑神经递质

Research on error accumulation control of three-dimensional adjustment with offset constraint

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Radiation Detection Technology and Methods 2022年第4期6卷 569-576页

作者： Wang Xiaolong Kang Ling Dong Lan Li Bo Men Lingling Luo Tao Wang Tong liang Jing He Zhenqiang Ke Zhiyong Ma Na Lu Shang Han yuanying Yan Luping Zhang Luyan Liu Xiaoyang Yan Haoyue Li Chunhua Wu Lei Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of Chinese Academy of Sciences Beijing 100049China

Background Currently,laser tracker is the primary instrument used to carry out three-dimensional position measurement in accelerator alignment.Theoretically,three-dimensional measuring data processed by three-dimensional adjustment are more rigorous,however,error accumulation is found in practice.Purpose In order to control error accumulation and further improve the measurement accuracy of accelerator alignment,this research introduces the laser alignment system into the activity of measurement and data processing.Methods A measurement scheme combining laser tracker and laser alignment system is proposed.To construct the constraint condition,the offset values from the measuring points to the laser straight-line datum were used.To carry out the three-dimensional adjustment with offset constraint,the laser tracker observations were used.Results A three-dimensional adjustment function model of laser tracker observations is given.The construction method of the constraint equation is researched,and the calculation formulas of the three-dimensional adjustment with offset constraint are derived.A 200 m linac tunnel control network is designed,using simulation measurement method,the measuring data of laser tracker and the offset values from the measuring points to the laser straight-line datum were generated.The simulated data are calculated by the method given in this paper and the result is analyzed.Conclusion Simulation result shows introducing the laser alignment system into laser tracker measurement and applying the three-dimensional adjustment with offset constraint can effectively suppress the error accumulation caused by long distance move station measurement.

关键词： Accelerator alignment Error accumulation Laser alignment system Laser tracker Three-dimensional adjustment Offset constraints Simulation measurement

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HEPS六极铁标定方案分析

核技术 2024年第2期47卷 41-48页

作者：韩圆颖吴亚峰董岚王铜卢尚闫路平张露彦刘晓阳闫皓月马娜何振强柯志勇门玲鸰李波王小龙梁静中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803

六极铁作为高能同步辐射光源(High Energy Photon Source,HEPS)储存环八铁单元的重要部件之一,其技术工艺较为复杂,对加工精度和中心引出精度要求都很高。本文对HEPS六极铁的机械中心引出标定方案进行了研究,利用极缝偏差角对常规标定... 详细信息

六极铁作为高能同步辐射光源(High Energy Photon Source,HEPS)储存环八铁单元的重要部件之一,其技术工艺较为复杂,对加工精度和中心引出精度要求都很高。本文对HEPS六极铁的机械中心引出标定方案进行了研究,利用极缝偏差角对常规标定坐标系进行旋转,使三个极缝面更接近理论位置,从而减小磁铁主场斜分量;对每块磁铁进行两次机械中心标定,极缝间距的实测值与设计值的标准偏差在0.015 mm,坐标系旋转前后的基准点偏差标准值为0.09 mm,旋转角最大可达0.6 mrad。这种考虑极缝偏差角的建系方法可以提高标定的精度,能为实际工作中同类型、准直精度有相同要求的设备标定提供参考,有利于加速器装置的顺利安装,对加速器准直测量具有十分重要的意义。

关键词：六极铁中心标定机械中心坐标系旋转准直精度

Diversity of arbuscular mycorrhizal fungal spore communities and its relations to plants under increased temperature and precipitation in a natural grassland

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Chinese Science Bulletin 2013年第33期58卷 4109-4119页

作者： SUN XiuFeng SU yuanying ZHANG Ying WU MingYu ZHANG Zhe PEI KeQuan SUN LiFu WAN ShiQiang liang Yu State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of Sciences College of Life Sciences Shaoxing Universtiy

Arbuscular mycorrhizal fungi(AMF)form mutualisms with most plant species,and therefore,understanding how AMF communities will respond to climate change is essential for predictions of changes in plant communities.To evaluate the impact of global climate change on AMFs and plant-AMF interactions in a natural grassland in Inner Mongolia,both artificial warming and watering treatments were assigned to experimental plots.Our results indicate that(1)warming and precipitation significantly affected the relative spore abundance of abundant sporulating AMF species;(2)the relative abundance of weak sporulating AMF species and AMF diversity decreased under experimental warming;(3)evidence was found that the composition of the AMF community in a given year might be correlated with plant community composition in the following year;and(4)grasses and forbs showing different preferences to Claroideoglomus etunicatum or Ambispora gerdemannii dominated plots.Our results imply that climate change appears to induce changes in AMF assemblages with knock-on effects on grassland plant communities.AMF communities may play a much more important role than we have thought in the responses of ecosystem to global climate changes.

关键词：丛枝菌根真菌真菌孢子植物种类天然草场多样性降水社区全球气候变化

14.4% Efficiency All-Polymer Solar Cell with Broad Absorption and Low Energy Loss Enabled by a Novel Polymer Acceptor

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14.4% Efficiency All-Polymer Solar Cell with Broad Absorptio...