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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 *** 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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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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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 *** 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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Progress in polymer solar cell

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Chinese Science Bulletin 2007年第2期52卷 145-158页

作者： LI LiGui lu guanghao YANG XiaoNiu ZHOU EnLe State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022 China

This review outlines current progresses in polymer solar cell. Compared to traditional silicon-based photovoltaic (PV) technology, the completely different principle of optoelectric response in the polymer cell results in a novel configuration of the device and more complicated photovoltaic generation proc-ess. The conception of bulk-heterojunction (BHJ) is introduced and its advantage in terms of mor-phology is addressed. The main aspects including the morphology of photoactive layer, which limit the efficiency and stability of polymer solar cell, are discussed in detail. The solutions to boosting up both the efficiency and stability (lifetime) of the polymer solar cell are highlighted at the end of this review.

关键词：太阳能电池聚合体硅薄膜稳定性

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通道空间深度感知的轻量化水下目标检测

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计算机测量与控制 2024年第9期32卷 86-93页

作者：赵瑞金李海涛陆光豪青岛科技大学信息科学技术学院山东青岛266061

提出了一种通道空间深度感知的轻量化水下目标检测网络CSDP-L-YOLO;该网络基于YOLOv5网络进行改进,由特征感知模块和双注意门控策略组成;特征感知模块旨在将解码器中的多级特征自适应抑制或增强,优化类内学习的一致性,解决水下场景复杂... 详细信息

提出了一种通道空间深度感知的轻量化水下目标检测网络CSDP-L-YOLO;该网络基于YOLOv5网络进行改进,由特征感知模块和双注意门控策略组成;特征感知模块旨在将解码器中的多级特征自适应抑制或增强,优化类内学习的一致性,解决水下场景复杂导致的误检和漏检问题;通过线性操作和混洗结构生成特征映射,减少冗余特征的融合和计算,以减少模型的参数量和计算量;双注意门控策略是在编码器中同时引入并发通道空间挤压-激励机制模块和卷积注意力模块,进一步关注强相关性特征,增强模型对特征的敏感度;实验结果表明,与基线模型YOLOv5-s相比,mAP提高了2.4%,节省了20%参数量和15.8%计算量,检测速度提升了8.2 ms;此外,与目前较为先进的YOLOv8模型相比,mAP提高了1.9%。

关键词：水下目标检测通道空间深度感知注意力机制模型轻量化特征融合 YOLO

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基于知识图谱的水产养殖病害诊断技术研究

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计算机测量与控制 2024年第9期32卷 101-107页

作者：陆光豪李海涛赵瑞金青岛科技大学信息科学技术学院山东青岛266061

水产养殖病害是影响水产养殖效益的重要因素,由于水产养殖病害文本数据杂乱无章,无法快速准确定位疾病原因,从而耽误诊断和治疗时机,导致水产养殖质量和产量下降;为解决上述问题,深入知识图谱的工作原理和模型特征,采用知识图谱技术完... 详细信息

水产养殖病害是影响水产养殖效益的重要因素,由于水产养殖病害文本数据杂乱无章,无法快速准确定位疾病原因,从而耽误诊断和治疗时机,导致水产养殖质量和产量下降;为解决上述问题,深入知识图谱的工作原理和模型特征,采用知识图谱技术完成水产养殖病害诊断总体方案设计,建立水产病害语料库,引入H-BIO标注策略,完成标注方案设计、改进BiLSTM模型构建,进行实体关系抽取和水产病害模型训练,完成水产养殖病害知识图谱可视化设计,并进行水产病害联合抽取实验;实验结果表明:基于知识图谱的改进BiLSTM模型在实体关系抽取方面效果较好、可靠性较高,有效提高了水产病害联合抽取准确率,构建了水产养殖病害可视化知识图谱,能够辅助作业人员快速准确进行水产病害诊断和治疗,对提升水产养殖生产效益具有十分重要的作用。

关键词：水产养殖病害诊断知识图谱 H-BIO标注 BiLSTM模型

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Organic-semiconductor： Polymer-electret blends for high-performance transistors

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Nano Research 2018年第11期11卷 5835-5848页

作者： Peng Wei Shengtao Li Dongfan Li Han Yu Xudong Wang Congcong Xu Yaodong Yang Laju Bu guanghao lu Frontier Institute of Science and Technology and State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 7100S4 China School of Science Xi'an Jiaotong University Xi'an 710049 China

As compared with polymer semiconductors, solution-processed small-molecule semiconductors usually have poorer film-formation properties, which induces wide variations in device performance in terms of mobility and threshold voltage, thus severely limiting their commercial applications. In this work, we propose an easily accessible method to improve the performance and reduce the variability of small-molecule organic field-effect transistors (OFETs) by blending organic semiconductors with an insulator polymer, which is subsequently post-treated by gate stress to generate an electret. By blending the organic semiconductor 2,7-didodecyl[1]benzothieno[3,2-b][1]benzothiophene (C12-BTBT) with the insulator polystyrene, uniform transport layers with vertically phase segregated morphology are obtained, from which the mobility and threshold voltage of OFETs are largely manipulated. The OFETs exhibit field-effect mobilities as high as 7.5 cm2·V−1·s−1 with an on/off ratio exceeding 106 in ambient conditions. This double-layer structure provides an appropriate architecture for applying gate-stress to inject charges into the insulating layer, forming an electret. The generation of the electret is thermally accelerated and thus can be easily realized under moderate gate-stress at elevated temperature (e.g., 60 °C). After cooling, the electret layer serves as a floating-gate, which not only continuously tunes the threshold voltage and field-effect mobility, but also helps minimize the contact resistances and optimize the subthreshold swing. As an application of this method, a digital inverter is built and its performance is optimized via in situ tuning of its individual transistors.

关键词： organic field-effect transistors organic electronics vertical phase separation gate stress polymer electrets C 12 -BTBT

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Suppressing trap states and energy loss by optimizing vertical phase distribution through ternary strategy in organic solar cells

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Science China Chemistry 2021年第4期64卷 599-607页

作者： Pengqing Bi Shaoqing Zhang Tong Xiao Minghuan Cui Zhihao Chen Junzhen Ren Chaochao Qin guanghao lu Xiaotao Hao Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Crystal Materials School of PhysicsShandong UniversityJinan 250100China School of Chemistry and Biology Engineering University of Science and Technology BeijingBeijing 100083China Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power EquipmentXi’an Jiaotong UniversityXi’an 710054China Department of Physics Henan Normal UniversityXinxiang 453007China

Suppressing the trap-state density and the energy loss via ternary strategy was *** vertical phase distribution with donors(acceptors)accumulated(depleted)at the interface of active layer and charge extraction layer can be obtained by introducing appropriate amount of polymer acceptor N2200 into the systems of PBDB-T:IT-M and PBDB-TF:*** addition,N2200 is gradiently distributed in the vertical direction in the ternary blend *** measurements were carried out to study the effects of N2200 on the binary *** was found that the optimized morphology especially in vertical direction can significantly decrease the trap state density of the binary blend films,which is beneficial for the charge transport and *** these features enable an obvious decrease in charge recombination in both PBDB-T:IT-M and PBDB-TF:Y6 based organic solar cells(OSCs),and power conversion efficiencies(PCEs)of 12.5%and 16.42%were obtained for the ternary OSCs,*** work indicates that it is an effective method to suppress the trap state density and thus improve the device performance through ternary strategy.

关键词： non-fullerene organic solar cells ternary strategy vertical phase distribution trap state density energy loss

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Layer-by-layer slot-die coated high-efficiency organic solar cells processed using twin boiling point solvents under ambient condition

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Nano Research 2021年第11期14卷 4236-4242页

作者： Yu Yang Erming Feng Hengyue Li Zichao Shen Wanrong Liu Jingbo Guo Qun luo Jidong Zhang guanghao lu Changqi Ma Junliang Yang Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha410083China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an710054China Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou215123China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun130022China

Layer-by-layer (LbL) strategy has been developed to form bulk heterojunction (BHJ) structure for processing efficient organic solar cells (OSCs). Herein, LbL slot-die coating with twin boiling point solvents (TBPS) strategy was developed to fabricate highly efficient OSCs, which matches with large-scale, high throughput roll-to-roll (R2R) industrialized mass process. The TBPS strategy could produce high-quality thin film without any additive, leading to the optimized vertical phase separation with interpenetrating nanostructures, as well as the enhanced charge transport and extraction. Thus, the power conversion efficiency up to 14.42% was achieved for [(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo [1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione)]:2,2′-((2Z,2′Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2″,3″:4″,5″]thieno[2′,3′:4,5]pyrrolo[3,2-g]thieno[2′,3′:4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene)) bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (PM6:Y6) OSCs fabricated via sequentially LbL slot-die coating using the TBPS strategy under ambient condition. The research provides a potential route for industrialized production of high-efficiency and large-area OSC devices.

关键词： organic solar cells slot-die coating twin boiling point solvent layer-by-layer(LbL) vertical phase separation

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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 ***,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 *** 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 ***,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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