气候变化领域集成服务门户(CCPortal): Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells

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DOI	10.1039/d1ee01062j
	Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells
	Lee J.-W.; Jeong D.; Kim D.J.; Phan T.N.-L.; Park J.S.; Kim T.-S.; Kim B.J.
发表日期	2021
ISSN	17545692
起始页码	4067
结束页码	4076
卷号	14 期号:7
英文摘要	Developing polymer solar cells (PSCs) with high photovoltaic performance and mechanical robustness is one of the most urgent tasks to ensure their operational reliability and applicability in wearable devices. However, it remains challenging to enhance their mechanical properties without compromising the electrical properties of high-performance active materials. Here, we develop a series of novel polymer donors (PDs), with which highly efficient PSCs having remarkable mechanical reliability are demonstrated. By interposing a controlled amount of 1,10-di(thiophen-2-yl)decane flexible spacer (FS) into a PM6 backbone, we are able to significantly enhance the intermixing of the new PDs with a small molecule acceptor (Y7), affording sufficient pathways for efficient charge percolation and mechanical stress dissipation. As a result, PSCs based on the PD containing 5 mol% FS units and Y7 exhibit a high power conversion efficiency (PCE) of 17% with a crack onset strain (COS) of 12% and a cohesive fracture energy (Gc) of 2.1 J m-2, significantly outperforming reference PM6-based devices (PCE = 15%, COS = 2% and Gc = 1.0 J m-2). Both the photovoltaic performance and mechanical robustness of these PSCs are among the best values reported to date. The rational design of the PDs demonstrated here presents a highly promising strategy to address the mechanical properties of SMA-based solar cells and their viable application in flexible/stretchable electronics. © The Royal Society of Chemistry.
英文关键词	Biomechanics; Conversion efficiency; Flexible electronics; Mechanical properties; Polymers; Shims; Solvents; High power conversion; Mechanical reliability; Mechanical robustness; Mechanical stress; Mechanically robust; Operational reliability; Photovoltaic performance; Polymer solar cell (PSCs); Polymer solar cells; equipment; fuel cell; mechanical property; performance assessment; polymer; solar power
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190603
作者单位	Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea; Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
推荐引用方式 GB/T 7714	Lee J.-W.,Jeong D.,Kim D.J.,et al. Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells[J],2021,14(7).
APA	Lee J.-W..,Jeong D..,Kim D.J..,Phan T.N.-L..,Park J.S..,...&Kim B.J..(2021).Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells.Energy & Environmental Science,14(7).
MLA	Lee J.-W.,et al."Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells".Energy & Environmental Science 14.7(2021).