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

Shaorong Huang; Feiyan Wu; Zuoji Liu; Yongjie Cui; Lie Chena; Yiwang Chen

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

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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 absorption.The 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.

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《能源化学：英文版》 |2021年第2期|P.63-68I0003|共7页
作者
Shaorong Huang; Feiyan Wu; Zuoji Liu; Yongjie Cui; Lie Chena; Yiwang Chen;
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作者单位

College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031 Jiangxi China;

College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031 Jiangxi China;

College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031 Jiangxi China;

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering Donghua University Shanghai 201620 China;

College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031 Jiangxi China;

College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University.Nanchang 330031 Jiangxi ChinaInstitute of Advance Scientific Research(iASR) Jiangxi Normal University 99 Ziyang Avenue Nanchang 330022 Jiangxi ChinaState Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering Donghua University Shanghai 201620 China;

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原文格式 PDF
正文语种 chi
中图分类高分子化学（高聚物）;
关键词
All-polymer solar cells; Polymer acceptor; Functional atoms; Power conversion efficiency;

机译：全聚合物太阳能电池;聚合物受体;功能原子;电力转换效率;

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

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