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Novel polymer acceptors achieving 10.18% efficiency for all-polymer solar cells

Journal of Energy Chemistry 2021年第2期30卷 63-68,I0003页

作者： Shaorong Huang Feiyan Wu Zuoji Liu Yongjie Cui lie chena Yiwang Chen College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031JiangxiChina Institute of Advance Scientific Research(iASR) Jiangxi Normal University99 Ziyang AvenueNanchang 330022JiangxiChina State Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering Donghua UniversityShanghai 201620China

Polymer acceptors based on extended fused ring p skeleton has been proven to be promising candidates for all-polymer solar cells(all-PSCs), due to their remarkable improved light absorption than the traditional imide-based polymer acceptors. To expand structural diversity of the polymer acceptors, herein,two polymer acceptors PSF-IDIC and PSi-IDIC with extended fused ring p skeleton are developed by copolymerization of 2,20-((2 Z,20 Z)-((4,4,9,9-tetrahexadecyl-4,9-dihydro-s-indaceno [1,2-b:5,6-b']dithio phene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1 H-indene-2,1-diylidene))dimalononitrile(IDIC-C16) block with sulfur(S) and fluorine(F) functionalized benzodithiophene(BDT) unit and silicon(Si) atom functionalized BDT unit, respectively. Both polymer acceptors exhibit strong light *** PSF-IDIC exhibits similar energy levels and slightly higher absorption coefficient relative to the PSi-IDIC. After blended with the donor polymer PM6, the functional atoms on the polymer acceptors show quite different effect on the device performance. Both of the acceptors deliver a notably high open circuit voltage(V_(OC)) of the devices, but PSi-IDIC achieves higher V OCthan PSF-IDIC. All-PSC based on PM6:PSi-IDIC attains a power conversion efficiency(PCE) of 8.29%, while PM6:PSF-IDIC-based device achieves a much higher PCE of 10.18%, which is one of the highest values for the all-PSCs reported so far. The superior device performance of PM6:PSF-IDIC is attributed to its higher exciton dissociation and charge transport, decreased charge recombination, and optimized morphology than PM6:PSi-IDIC counterpart. These results suggest that optimizing the functional atoms of the side chain provide an effective strategy to develop high performance polymer acceptors for all-PSCs.

关键词： All-polymer solar cells Polymer acceptor Functional atoms Power conversion efficiency

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Function-Oriented Natural Product Synthesis

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Chinese Journal of Chemistry 2021年第4期39卷 838-854页

作者： Kaiqi Chen Fan Wu Xiaoguang Lei Beijing National Laboratory for Molecular Sciences State Key Laboratory of Natural and Biomimetic DrugsKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules CenterPeking UniversityBeijing100871 China Peking-Tsinghua Center for Life Science Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing100871 China

Natural products and their derivatives have long been used as medicinal agents,and they still make up a significant fraction of clinically approved *** product synthesis provides a rich and unparalleled opportunity to develop new synthetic transformations,conceive novel and general strategies to access complex structures,and study the mechanism of action of bioactive *** combination of the tools and principles of chemistry,together with the tools of modern biology,allows us to create complex synthetic and natural molecules,comprising processes with novel biological,chemical and physical *** account will illustrate the opportunities that lie at this interface between synthetic organic chemistry and chemical biology by describing a series of examples that we are actively working on in our laboratory at Peking *** take the inspiration from mother nature to develop new synthetic strategies to achieve the efficient synthesis of complex natural *** addition,we also conduct chemical biology studies for these bioactive natural products to elucidate their cellular targets and mode of ***,we further use bioactive natural products to explore new biology and develop novel drug candidates for human diseases,such as cancers and infectious diseases.

关键词： Natural products Total synthesis Chemical biology Target identification Drug discovery

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