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Manipulating Film Formation Kinetics Enables Organic Photovoltaic Cells with 19.5%Efficiency

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CCS Chemistry 2024年第1期6卷 218-229页

作者： Jianqiu Wang Pengqing Bi Yafei Wang Zhong Zheng Zhihao Chen Jiawei Qiao Wenxuan Wang Jiayao Li Cunbin An Shaoqing Zhang xiaotao hao Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083 School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100

Organic photovoltaic(OPV)cells have demonstrated remarkable performance in small,spin-coated *** significant challenges persist in the form of large efficiency losses due to the fact that the ideal morphology cannot be preserved in the transition of small-area cells to large-scale ***,the ternary strategy of incorporating the third component FTCC-Br into the active layer of PB2:BTP-eC9 is employed to improve absorption response,optimize morphology,and reduce charge recombination,leading to a power conversion efficiency(PCE)of 19.5%(certified as 19.1%by the National Institute of Metrology,China).Moreover,the addition of FTCC-Br can control the aggregation kinetics of the active layer during the film formation process,transferring the optimal morphology to the blade-coated large-area *** on the highly efficient ternary bulk heterojunction,the 50 cm^(2) OPVmodules exhibited a PCE of 15.2%with respect to the active ***,the ternary OPV cells retain 80%of its initial PCE after 4000 h under continuous *** work demonstrates that the addition of a third component has the potential to improve the efficiency and stability of large-area organic solar cells.

关键词： organic photovoltaic cells morphology control large area cells ternary strategy power conventional efficiency

Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

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National Science Review 2023年第6期10卷 215-225页

作者： Jianqiu Wang Zhong Zheng Pengqing Bi Zhihao Chen Yafei Wang Xiaoyu Liu Shaoqing Zhang xiaotao hao Maojie Zhang Yongfang Li Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductoroptoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University School of Chemistry and Biology Engineering University of Science and Technology Beijing School of Physics State Key Laboratory of Crystal Materials Shandong University University of Chinese Academy of Sciences CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells(OSCs).Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl:BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage *** is found that the introduction of AITC can modify domain size and increase the degree of crystallinity,which enhances open-circuit voltage and power conversion efficiency(19.1%,certified as 18.9%).Inspiringly,an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl:AITC:BTP-eC9 ternary active layer output a recorded efficiency of 20.6%(certified as 20.3%),which is the highest value in OSCs field to *** work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.

关键词： organic solar cells power conversion efficiency voltage losses tandem cells ternary strategy

Atmospheric iron deposition in a megacity of northwest China:Solubility,speciation,and deposition fluxes

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Particuology 2024年第7期90卷 383-393页

作者： xiaotao Yang Pingping Liu Zhiwei Xue hao Zhang Xuan Li Hongmei Xu Zhenxing Shen Department of Environmental Science and Engineering Xi'an Jiaotong UniversityXi'anChina State Key Laboratory of Loess and Quaternary National Key R&D of China Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'anChina No.203 Research Institute of Nuclear Industry Xi'an710086China Xi'an Environmental Monitoring Station Xi'an 710054China

Atmospheric iron has crucial effects on biogeochemical cycles,atmospheric processing,global climate,and human *** this study,atmospheric dustfall samples were collected from six functional areas in Xi'an,China,from 2020 to *** spatiotemporal distributions and deposition fluxes of total and water-soluble(ws)Fe as well as the speciation and potential sources of ws-Fe were *** areas had the highest concentrations of total Fe and ws-Fe,which were mainly due to copious emissions of heavy metals during *** total Fe concentrations peaked in spring,primarily due to the substantial input of crustal dust,which also led to the lowest Fe solubility in this *** contrast,the highest levels of ws-Fe occurred during winter due to an increase in biomass *** the water-soluble forms,ws-Fe(II)was dominant and accounted for 74.8%of the total amount of *** dust was the main contributor to total Fe,whereas biomass burning primarily contributed to peak ws-Fe *** average total and ws-Fe deposition fluxes in Xi'an were the highest in spring and lowest in autumn,which were related to the distributions of the dustfall deposition fluxes and their Fe contents during these *** study provided a broader and comprehensive understanding of atmospheric iron deposition in Chinese urban area,which is of positive significance for understanding atmospheric chemistry and global climate change.

关键词： Atmospheric dustfall Iron Speciation distribution Seasonal variation Functional area Sources

Extracting energetic disorder in organic solar cells using percolation models

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ChemPhysMater 2023年第1期2卷 52-57页

作者： Rui Shi Haixia Hu Tao Chen Ruohua Gui Jianqiang Liu xiaotao hao Hang Yin School of Physics Shandong UniversityJinan 250100China School of Physics and Electrical Engineering Kashgar UniversityKashgar 844000China

The energetic disorder𝜎describes the energy state distribution in organic semiconducting *** organic solar cells(OSCs),energetic disorder is an important parameter for evaluating the charge transport behavior,and it is strongly correlated with the device *** far,a widely used approach for extracting energetic disorder values in OSCs is the Gaussian disorder model(GDM),in which the disorder values can be extracted by fitting the slope of lnμ∼1-T2,where𝜇is the charge mobility and𝑇is the ***,we demonstrate the potential of the percolation approach to evaluate the energetic disorder values in OSCs and compare them with the data obtained using the GDM *** typical non-fullerene acceptor(NFA)-based bulk heterojunction(BHJ)films,with PTB7-Th:ITIC and PM6:Y6,were selected as the model *** the percolation models were adopted in the two BHJ films,the energetic disorder values extracted from the Grünewald/Thomas and Nenashev percolation models gave similar results for electron transport in the PTB7-Th:ITIC and PM6:Y6 BHJ *** work successfully demonstrates the feasibility of microresistance analysis in BHJ systems and the application potential of the percolation model for extracting energetic disorders in OSCs.

关键词： Organic solar cell Bulk heterojunction film Percolation model Energetic disorder Capacitance spectra

All organic multiferroic magnetoelectric complexes with strong interfacial spin-dipole interaction

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npj Flexible Electronics 2021年第1期5卷 192-197页

作者： Yuying Yang Zhiyan Chen Xiangqian Lu xiaotao hao Wei Qin School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinanChina ARC Centre of Excellence in Exciton Science School of ChemistryThe University of MelbourneParkvilleVICAustralia

The organic magnetoelectric complexes are beneficial for the development on flexible magnetoelectric devices in the *** this work,we fabricated all organic multiferroic ferromagnetic/ferroelectric complexes to study magnetoelectric coupling at room *** the stimulus of external magnetic field,the localization of charge inside organic ferromagnets will be enhanced to affect spin–dipole interaction at organic multiferroic interfaces,where overall ferroelectric polarization is tuned to present an organic magnetoelectric ***,the magnetoelectric coupling of the organic ferromagnetic/ferroelectric complex is tightly dependent on incident light *** light intensity,the dominated interfacial interaction will switch from spin–dipole to dipole–dipole interaction,which leads to the magnetoelectric coefficient changing from positive to negative in organic multiferroic magnetoelectric complexes.

关键词： temperature dipole complexes

Industry-Oriented Detection Method of PCBA Defects Using Semantic Segmentation Models

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1438-1446页

作者： Yang Li Xiao Wang Zhifan He Ze Wang Ke Cheng Sanchuan Ding Yijing Fan xiaotao Li Yawen Niu Shanpeng Xiao Zhenqi hao Bin Gao Huaqiang Wu Department of Internet of Things Technology and Application China Mobile Research InstituteBeijing 100053China Beijing Advanced Innovation Center for Integrated Circuits the School of Integrated CircuitTsinghua UniversityBeijing 100084China SigmaStar Technology Limited Xiamen 361199China IEEE

Automated optical inspection(AOI)is a significant process in printed circuit board assembly(PCBA)production lines which aims to detect tiny defects in *** AOI equipment has several deficiencies including low throughput,large computation cost,high latency,and poor flexibility,which limits the efficiency of online PCBA *** this paper,a novel PCBA defect detection method based on a lightweight deep convolution neural network is *** this method,the semantic segmentation model is combined with a rule-based defect recognition algorithm to build up a defect detection *** improve the performance of the model,extensive real PCBA images are collected from production lines as *** optimization methods have been applied in the model according to production demand and enable integration in lightweight computing *** results show that the production line using our method realizes a throughput more than three times higher than traditional *** method can be integrated into a lightweight inference system and pro-mote the flexibility of *** proposed method builds up a general paradigm and excellent example for model design and optimization oriented towards industrial requirements.

关键词： Automated optical inspection(AOI) deep learning defect detection printed circuit board assembly(PCBA) semantic segmentation.

DEEP-UV CONFOCAL FLUORESCENCE IMAGING AND SUPER-RESOLUTION OPTICAL MICROSCOPY OF BIOLOGICAL SAMPLES

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Journal of Innovative Optical Health Sciences 2012年第4期5卷 24-32页

作者： TREVOR A.SMITH LIISA M.HIRVONEN CRAIG N.LINCOLN xiaotao hao School of Chemistry and ARC Centre of Excellence for Coherent X-ray Science University of Melbourne Parkville 3010Australia

A wide range of techniques has been developed to image biological samples at high spatial and temporal *** this paper,we report recent results from deep-UV confocal fAuorescence microscopy to image inherent emission from fuorophores such as tryptophan,and structured ilumination microscopy(SIM)of biological *** motivation for developing deep-UV fhuorescence imaging and SIM is to provide methods to complement our measurements in the emerging field of X-ray coherent diffractive imaging.

关键词： Time resolved fuorescence imaging structured ilumnina tion microscopy

Influence of donor:acceptor ratio on charge transfer dynamics in non-fullerene organic bulk heterojunctions

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Chinese Chemical Letters 2021年第1期32卷 529-534页

作者： Zhenchuan Wen Tong Wang Zhihao Chen Tingting Jiang Lin Feng Xianjin Feng Chaochao Qin xiaotao hao School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJi’nan 250100China School of Physics Henan Normal UniversityXinxiang 453000China Center of Nanoelectronics and School of Microelectronics Shandong UniversityJi’nan 250100China ARC Centre of Excellence in Exciton Science School of ChemistryThe University of MelbourneParkvilleVictoria 3010Australia

The donor:acceptor(D:A) blend ratio plays a very important role in affecting the progress of charge transfer and energy transfer in bulk heterojunction(BHJ) orga nic solar cells(OSCs).The proper D:A blend ratio can provide maximized D/A interfacial area for exciton dissociation and appro p riate domain size of the exciton diffusion length,which is beneficial to obtain high-performance ***,we comprehensively investigated the relationship between various D:A blend ratios and the charge transfer and energy transfer mechanisms in OSCs based on PBDB-T and non-fullerene acceptor *** on various D:A blend ratios,it was found that the ratio of components is a key factor to suppress the formation of triplet states and recombination energy *** D:A blend ratios can provide appropriate donor/accepter surface for charge transfer which has been powerfully verified by various detailed experimental results from the time-resolved fluorescence measurement and transient absorption(TA) *** coherence length and crystallinity are verified by grazing incident wide-angle X-ray scattering(GIWAXS) *** results are bene ficial to comprehend the effects of various D:A blend ratios on charge transfer and energy transfer dynamics and provides constructive suggestions for rationally designing new materials and feedback for photovoltaic performance optimization in non-fullerene OSCs.

关键词： Donor:acceptor ratio Charge transfer dynamics Non-fullerene Organic bulk heterojunctions Organic solar cells

High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning Conformations of Dimeric Electron Acceptors

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CCS Chemistry 2023年第11期5卷 2576-2588页

作者： Xiaobin Gu Yanan Wei Na Yu Jiawei Qiao Ziyang Han Qijie Lin Xiao Han Jinhua Gao Congqi Li Jianqi Zhang xiaotao hao Zhixiang Wei Zheng Tang 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 SciencesBeijing 100049 Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620 School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100 Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190

Dimeric fused-ring electron acceptors(DFREAs)have attracted much attention due to the combined advantages of their monomeric and polymeric acceptors,including a well-defined molecular structure,excellent repeatability,and stable ***,the additionally introduced single-bonds during dimerization may result in a twisted backbone of DFREAs,which is detrimental to intermolecular packing and charge ***,three DFREAs are designed and synthesized,in which DFREA conformations were systematically tuned via adjusting the intensities of intramolecular noncovalent interactions(INIs)to achieve high-performance organic solar cells(OSCs).Theoretical and experimental results show that the gradual introduction of S…F INIs can continuously improve molecular planarity and rigidity,resulting in reduced reorganization energies,ordered packing mode,and enhanced crystallization of *** from the incorporation of fourfold S…F INIs,DYF-TF-based binary OSCs show a record high efficiency of 18.26%with an extremely low energy loss(0.493 eV)for DFREAbased *** addition,DYF-TF-based OSCs exhibited good long-term stability with a T_(80%)lifetime of 2681 h,and the power conversion efficiency of the DYF-TF-based ternary device is further enhanced to 18.73%.This contribution demonstrates the great potential of the INIs strategy in achieving excellent DFREAs materials.

关键词： organic solar cells dimeric fused-ring electron acceptors intramolecular noncovalent interactions molecular planarity and rigidity reorganization energies