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Precise synthesis of conjugated polymers via a scalable and homogeneous room-temperature Suzuki-Miyaura coupling

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Science China Chemistry 2024年第6期67卷 1758-1759页

作者： yongfang li Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of SciencesBeijing100190China Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China

Conjugated polymers(CPs)have demonstrated promising applications in fields such as environment,energy,and information,which becomes a forefront in chemistry and materials sciences area[1,2].However,the synthetic chall... 详细信息

关键词： batch synthesis conjugated

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Large-area flexible organic photovoltaic modules

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Science China Chemistry 2024年

作者： yongfang li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and DevicesCollege of Chemistry Chemical Engineering and Materials Science Soochow University

Organic solar cells (OSCs) have the advantages of light weight and excellent mechanical stability [1]. The OSCs can be an ideal candidate as portable and wearable energy sources to power portable electronics, internet of things, ***, power conversion efficiency (PCE) of the smallarea OSCs have reached around 20%[2]. This makes the community more confident about this technology moving into practical applications.

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Semitransparent organic solar cells with high light utilization efficiency and color rendering index

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Science China Chemistry 2024年第7期67卷 2248-2256页

作者： Ni Gao Haijun Bin Shangrong Wu RenéA.J.Janssen yongfang li Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China Molecular Materials and Nanosystems&Institute for Complex Molecular Systems Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands

Semitransparent organic solar cells(ST-OSCs)have garnered considerable attention as promising renewable energy technology for integrating photovoltaics into ***,there is a trade-off between power conversion efficiency(PCE)and average visible transmittance(AVT),which hinders the achievement of a high light utilization efficiency(LUE).In this study,we propose a valuable method to address this challenge by replacing the transparent top electrode,Ag,with a 20 nm layer of *** ST-OSCs based on the 20 nm Au electrode demonstrate superior exciton extraction,more efficient charge collection,and higher color-rendering index(CRI)due to their smoother surface,higher conductivity,and enhanced visible light transmittance,resulting in a significantly higher PCE of 13.67%and an enhanced AVT of 30.17%,contributing to a high LUE of 4.15%.Additionally,optically transparent dielectric layers,applied on the front and back sides of the ST-OSCs to further boost performance,delivered an impressive LUE of 4.93%,with PCE and AVT values reaching 14.44%and 34.12%,***,the champion ST-OSCs also exhibited a favorable CRI value of *** achievements represent the bestperforming ST-OSCs to date with both high LUE and CRI and hold significant implications for the prospective commercialization of ST-OSCs.

关键词： semitransparent organic solar cells power conversion efficiency average visible transmittance light utilization efficiency color-rendering index

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Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells

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Chinese Chemical Letters 2024年第1期35卷 542-546页

作者： Wenbin Lai Safakath Karuthedath Chengyi Xiao Lei Meng Frédéric Laquai Weiwei li yongfang li Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia University of Chinese Academy of Sciences Beijing 100049China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable *** alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,yielding three double-cable polymers:PBC6-T,PBC12-T,and PBC24-T,***12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%,while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65%and 1.09%in single-component organic solar cells(SCOSCs).Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport,resulting in better *** work provides an approach to construct double-cable conjugated polymers with long alkyl linkers,and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.

关键词： Double-cable conjugated polymer Single-component organic solar cell Crystallinity Semirigid linkers Alkyl-thiophene-alkyl

Facilely synthesized n-type conducting polymer with solution processability, ultra-high conductivity and high stability

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National Science Review 2023年第2期10卷 85-86页

作者： yongfang li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences

Conducting polymers(CPs) have drawn great attention since the emergence of doped polyacetylene in 1977 [1].The solution processability is a key property for the application of CPs,but it is challenging for highly conductive CPs without flexible side *** et *** 1992 proposed ’counter-ion induced processability’ to achieve the solution-processable conducting polyaniline [2].Since then,a variety of solution-processable CPs have been developed and commercialized.

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用于基层的氯氧镁水泥稳定碎石胶凝材料组成分析

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上海公路 2024年第1期 145-150,M0009页

作者：李永芳中铁五局集团成都工程有限责任公司四川成都610073

为确定氯氧镁水泥稳定碎石应用在路面基层结构中合理的胶凝材料组成,解决击实试验中变量不恒定的问题,采用相理论推导和正交设计试验,利用矩阵分析法,对影响氯氧镁水泥稳定碎石力学性能的因素进行了分析和验证。结果表明,相理论配比结... 详细信息

为确定氯氧镁水泥稳定碎石应用在路面基层结构中合理的胶凝材料组成,解决击实试验中变量不恒定的问题,采用相理论推导和正交设计试验,利用矩阵分析法,对影响氯氧镁水泥稳定碎石力学性能的因素进行了分析和验证。结果表明,相理论配比结合正交试验所得的配比最优组合与击实试验所得的配比结果一致,确定了氯氧镁水泥稳定碎石胶凝材料的最佳配比范围为轻烧粉掺量3.5%~4%,MgO/MgCl_(2)摩尔比6~7,MgCl_(2)浓度20%~22%。氯氧镁水泥稳定碎石混合料可以通过相理论配比来进行材料组成正交设计,解决了通过击实试验无法解决的MgCl_(2)浓度的问题,为氯氧镁水泥稳定粒料基层的后续研究奠定了理论基础。

关键词：氯氧镁水泥稳定碎石胶凝材料矩阵分析法

Molecular Design Strategies of Photovoltaic Materials for Polymer Solar Cells

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Chinese Journal of Polymer Science 2022年第8期40卷 844-845,I0005页

作者： yongfang li Institute of Chemistry Chinese Academy of Sciences Soochow University

Polymer solar cells(PSCs)are composed of a blend active layer of a p-type conjugated polymer(p-CP)as donor and an n-type organic semiconductor(n-OS)as acceptor,sandwiched between a transparent electrode and a metal *** photovoltaic materials and devices of the PSCs have attracted great attention in recent years,due to their advantages of low-cost solution-processing,light weight,thin active layer,and capability to be fabricated into flexible and semitransparent devices.

关键词： Solar transparent sandwich

Amphiphilic hole-transporting materials minimize the buried interfacial defects for efficient p-i-n perovskite solar cells

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Science China Chemistry 2023年第8期66卷 2155-2156页

作者： yongfang li Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing100190China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China

The explosive growth of academic research on perovskite solar cells(pero-SCs)was initiated by a key innovation that incorporated solid-state hole-transporting materials(HTMs)to replace the liquid electrolyte used in t... 详细信息

关键词： perovskite interfacial replace

All-in-one strategy: overcome the challenges in the device enlargement of perovskite solar cells

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Science China Chemistry 2022年第7期65卷 1223-1224页

作者： Lei Meng yongfang li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

In recent years, perovskite solar cells(pero-SCs) have gained tremendous development with power conversion efficiency(PCE) reaching 25.7% [1]. Based on its low process cost and high efficiency, pero-SC is now consider... 详细信息

关键词： perovskite overcome gained