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Enhanced open-circuit voltage in methoxyl substituted benzodithiophene-based polymer solar cells

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Science China Chemistry 2017年第2期60卷 243-250页

作者： xiaonan xue Yao Liu Xiangyi Meng Xiaobo Sun Lijun Huo Wei Ma Yanming Sun School of Chemistry and Environment Beihang University Beijing 100191 China Heeger Beijing Research and Development Center Beihang University Beijing 100191 China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China

The open-circuit voltage(V_(oc))is one of the important parameters that influence the power conversion efficiency(PCE)of polymer solar *** value is mainly determined by the energy level offset between the highest occupied molecular orbital(HOMO)of the donor and the lowest unoccupied molecular orbital(LUMO)of the ***,decreasing the HOMO value of the polymer could lead to a high V_(oc)and thus increasing the cell *** we report a facile way to lower the polymer HOMO energy level by using methoxyl substituted-benzodithiophene(BDT)*** polymer with the methoxyl functionl group(POBDT(S)-T1)exhibited a HOMO value of-5.65 eV,which is deeper than that(-5.52 eV)of polymer without methoxyl unit(PBDT(S)-T1).As a result,POBDT(S)-T1-based solar cells show a high V_(oc)of 0.98 V and PCE of 9.2%.In contrast,PBDT(S)-T1-based devices show a relatively lower V_(oc)of 0.89 V and a moderate PCE of 7.4%.The results suggest that the involvement of methoxyl group into conjugated copolymers can efficiencly lower their HOMO energy levels.

关键词： polymer solar cell conjugated polymer HOMO open-circuit voltage power conversion efficiency

Design Rules of the Mixing Phase and Impacts on Device Performance in High-Efficiency Organic Photovoltaics

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Research 2022年第4期2022卷 621-631页

作者： Jingnan Song Ming Zhang Tianyu Hao Jun Yan Lei Zhu Guanqing Zhou Rui Zeng Wenkai Zhong Jinqiu Xu Zichun Zhou xiaonan xue Chun-Chao Chen Weihua Tang Haiming Zhu Zaifei Ma Zheng Tang Yongming Zhang Feng Liu School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesCenter of Hydrogen ScienceShanghai Key Lab of Electrical Insulation Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Department of Physics Imperial Collge LondonLondon SW72AZUK School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Department of Chemistry Zhejiang UniversityHangzhou 310027China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company ZiboCityShandongProvince 256401China

In nonfullerene acceptor-(NFA-)based solar cells,the exciton splitting takes place at both domain interface and donor/acceptor mixture,which brings in the state of mixing phase into *** energetics and morphology are key parameters dictating the charge generation,diffusion,and *** is revealed that tailoringthe electronic properties of the mixing region by doping with larger-bandgap components could reduce the density of state but elevate the filling state level,leading to improved open-circuit voltage(V_(OC))and reduced *** monomolecular and bimolecular recombinations are shown to be intercorrelated,which show a Gaussian-like relationship with V_(OC) and linear relationship with short-circuit current density(JSC)and fill factor(FF).The kinetics of hole transfer and exciton diffusion scale with JSC similarly,indicating the carrier generation in mixing region and crystalline domain are equally *** the morphology perspective,the crystalline order could contribute to V_(OC) improvement,and the fibrillar structure strongly affects the *** observations highlight the importance of the mixing region and its connection with crystalline domains and point out the design rules to optimize the mixing phase structure,which is an effective approach to further improve device performance.

关键词： mixing crystalline diffusion

Influence of Aromatic Heterocycle of Conjugated Side Chains on Photovoltaic Performance of Benzodithiophene-Based Wide-Bandgap Polymers

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Influence of Aromatic Heterocycle of Conjugated Side Chains ...

高效液相色谱法检测甲磺酸达比加群酯及有关物质

中国化学会第30届学术年会-第二十二分会：有机光伏的机遇和挑战

作者： xiaonan xue Bingbing Fan Lijun Huo Xiaobo Sun Heeger Beijing Research and Development Center School of Chemistry and EnvironmentBeihang University

Extensive efforts have been focused on the study of wide-band gap(WBG) polymers due to their important application in multiple junction and ternary blend organic solar cells. Herein, three WBG copolymers named PBDT(X)-T1(X = O, S, Se) were synthesized based on benzodithiophene(BDT) donor unit and 1,3-bis(5-bromothiophen-2-yl)-5,7-bis(2-ethylhexyl)-4H,8H-benzo[1,2-c:4,5-c′]dithiophene-4,8-dione(T1) acceptor unit. Different aromatic heterocycle groups(furan, thiophene and selenophene) were used to modify BDT unit to investigate the influence of conjugated side chains on photovoltaic properties of conjugated polymers.. Among them, the PBDT(Se)-T1-based solar cells show the best photovoltaic performance with highest power conversion efficiencies(PCEs) of 8.52%, open-circuit voltage(Voc) of 0.91 V, and high fill factor(FF) of 72%. The results indicate the importance role of chalcogen atoms in conjugated side chains and high photovoltaic performance can be realized through side chain engineering of BDT-based WBG conjugated polymers.

关键词： BHJ polymer solar cell BDT ring substituents

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中国药科大学学报 2017年第6期48卷 711-714页

作者：薛晓楠张正进邹强闫超上海交通大学药学院上海200240 上海现代制药股份有限公司上海200137

为了研究甲磺酸达比加群酯的有关物质,本研究合成了7个有关化合物,建立了相关的HPLC检测方法(以XBridge C_(18)为色谱柱,甲醇-0.01 mol/L磷酸二氢钾为流动相梯度洗脱,检测波长为310 nm),并对样品的溶解溶剂和进样体积进行了筛选。结果显... 详细信息

为了研究甲磺酸达比加群酯的有关物质,本研究合成了7个有关化合物,建立了相关的HPLC检测方法(以XBridge C_(18)为色谱柱,甲醇-0.01 mol/L磷酸二氢钾为流动相梯度洗脱,检测波长为310 nm),并对样品的溶解溶剂和进样体积进行了筛选。结果显示,所建立的HPLC分析方法能使达比加群酯和7个化合物达到完全分离,且重复性好,准确度高,适用于甲磺酸达比加群酯有关物质的检测。

关键词：甲磺酸达比加群酯有关物质 HPLC 含量测定

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深国投商业中心项目消防火灾场景设计

科技广场 2010年第9期 181-187页

作者：薛晓楠南昌大学建筑工程学院江西南昌330031

在传统的防火设计中,设计人员只需要按照规范条文的要求按部就班地进行设计,对于设计所要达到的最终安全水平或目标并不关心。安全目标对设计人员是隐含的,在性能化防火设计中,安全目标是设计人员必须关心的内容之一。安全目标是防火设... 详细信息

在传统的防火设计中,设计人员只需要按照规范条文的要求按部就班地进行设计,对于设计所要达到的最终安全水平或目标并不关心。安全目标对设计人员是隐含的,在性能化防火设计中,安全目标是设计人员必须关心的内容之一。安全目标是防火设计应该达到的最终目标或安全水平,除非规范中有明确的规定,一般应该同消防主管部门、建筑业主、建筑使用方共同协商确定。安全目标确定后,设计人员应根据建筑物的各种不同空间条件、功能要求及其他相关条件,自由选择达到防火安全目标应采取的防火措施并将其有机地结合起来,构成建筑物的总体防火设计方案。

关键词：消防安全目标火灾

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再生钢管混凝土柱黏结滑移性能试验研究

华东交通大学学报 2018年第4期35卷 39-46页

作者：薛晓楠衷政杰南昌县公安消防大队江西南昌330008 华东交通大学土木建筑学院江西南昌330013

为了探讨再生钢管大骨料混凝土柱的黏结滑移性能,设计8根钢管再生大骨料混凝土柱,并对其进行推出试验,试验主要研究了取代率及界面黏结长度两个因素与初始黏结强度和极限黏结强度的关系,得到相应黏结滑移曲线。结果表明:再生钢管大骨料... 详细信息

为了探讨再生钢管大骨料混凝土柱的黏结滑移性能,设计8根钢管再生大骨料混凝土柱,并对其进行推出试验,试验主要研究了取代率及界面黏结长度两个因素与初始黏结强度和极限黏结强度的关系,得到相应黏结滑移曲线。结果表明:再生钢管大骨料混凝土柱的应力-滑移曲线主要经历了三个阶段,即无滑移阶段、上升阶段和下降阶段,加载端、中部及自由端全过程应力-滑移曲线具有相似性;取代率在一定范围内(0~40%),极限黏结强度随着取代率的增大而增大,在取代率为40%时达到最大,初始粘结强度随着取代率的增大有所增大,但增大幅度不大,得到再生大骨料的最优取代率约为40%;黏结界面长度在一定范围内(400~700 mm),初滑移黏结强度随着黏结界面长度的增加有所增加,但增幅不大,约为0.001 MPa,而极限黏结强度随着黏结界面长度的增加有下降趋势。

关键词：再生钢管大骨料混凝土柱推出试验取代率黏结界面长度黏结滑移

200 MHz带宽基带信号发生器的设计与实现

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国外电子测量技术 2017年第10期36卷 69-72页

作者：薛晓男李增红中国电子科技集团公司第四十一研究所青岛266555

介绍了基于FPGA的基带信号发生器设计方案,主要叙述了成型滤波以及任意重采样内插比等关键技术。该基带信号发生器不仅实现了标准数字调制格式的基带信号发生,而且通过FPGA内部的并行架构设计,实现了500 MHz的高速数据速率,I/Q带宽达到2... 详细信息

介绍了基于FPGA的基带信号发生器设计方案,主要叙述了成型滤波以及任意重采样内插比等关键技术。该基带信号发生器不仅实现了标准数字调制格式的基带信号发生,而且通过FPGA内部的并行架构设计,实现了500 MHz的高速数据速率,I/Q带宽达到200 MHz。将其应用于矢量信号发生器中,既实现了PSK、ASK、FSK、MSK、QAM等标准数字调制格式的矢量信号,又实现了400 MHz矢量调制带宽。经过测试,在4 M码元速率的情况下,QPSK和512QAM调制格式的EVM分别达到0.7%和1.0%;400 MHz带宽的矢量调制信号频响小于1dB。

关键词：基带信号成型滤波任意重采样内插比 I Q EVM 矢量调制带宽

Targeting cholesterol trafficking to mitigate axonal degeneration in hereditary spastic paraplegia

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Neural Regeneration Research 2025年第5期20卷 1397-1398页

作者： Zhenyu Chen xue-Jun Li Department of Biomedical Sciences University of Illinois College of Medicine RockfordRockfordILUSA Department of Bioengineering University of Illinois at ChicagoChicagoILUSA

Axonal degeneration underlies many debilitating diseases including hereditary spastic paraplegia(HSP),a genetically and clinically diverse group of disorders characterized by spasticity and weakness of the lower *** is one significant cause of chronic neurodisability due to the lack of effective treatments and a wide range of onset ages from early childhood to 70 years.

关键词： degeneration diseases hereditary

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao Yu-Gui Peng Peng Wu Zong-Lin Li xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states