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具有柔性连接基的电子受体实现的高性能本征可拉伸有机太阳能电池。

High-Performance Intrinsically-Stretchable Organic Solar Cells Enabled by Electron Acceptors with Flexible Linkers.

作者信息

Ding Yafei, Xiong Shilong, Memon Waqar Ali, Zhang Di, Wang Zhi, Li Mingpeng, Deng Zihao, Li Heng, Shao Ming, He Feng

机构信息

Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.

出版信息

Angew Chem Int Ed Engl. 2025 Apr 1;64(14):e202421430. doi: 10.1002/anie.202421430. Epub 2025 Feb 27.

Abstract

Intrinsically stretchable organic solar cells (IS-OSCs) are emerging as promising candidates for powering next-generation wearable electronics. However, developing molecular design strategies to achieve both high efficiency and mechanical robustness in IS-OSCs remains a significant challenge. In this work, we present a novel approach by synthesizing a dimerized electron acceptor (DY-FBrL) that enables rigid OSCs with a high power conversion efficiency (PCE) of 18.75 % and a crack-onset strain (COS) of 18.54 %. The enhanced PCE and stretchability of DY-FBrL-based devices are attributed to its extended π-conjugated backbone and elongated side chains. Furthermore, we introduce an innovative polymerized acceptor (PDY-FL), synthesized via the polymerization of DY-FBrL. While PDY-FL-based devices exhibit a slightly lower PCE of 14.13 %, they achieve a significantly higher COS of 23.45 %, representing one of the highest PCEs reported for polymerized acceptors containing only flexible linkers. Consequently, IS-OSCs fabricated using DY-FBrL and PDY-FL achieve notable PCEs of 14.31 % and 11.61 %, respectively. Additionally, the device stretchability improves progressively from Y6 (strain at PCE=11 %), to DY-FBrL (strain at PCE=23 %), and PDY-FL (strain at PCE=31 %). This study presents a promising molecular design strategy for tailoring electron acceptor structures, offering a new pathway to develop high-performance IS-OSCs with enhanced mechanical properties.

摘要

本征可拉伸有机太阳能电池(IS-OSCs)正成为为下一代可穿戴电子产品供电的有前途的候选者。然而,开发在IS-OSCs中实现高效率和机械稳健性的分子设计策略仍然是一项重大挑战。在这项工作中,我们提出了一种新方法,通过合成一种二聚电子受体(DY-FBrL),该受体可使刚性有机太阳能电池具有18.75%的高功率转换效率(PCE)和18.54%的起裂应变(COS)。基于DY-FBrL的器件的PCE和拉伸性增强归因于其扩展的π共轭主链和伸长的侧链。此外,我们引入了一种通过DY-FBrL聚合合成的创新聚合受体(PDY-FL)。虽然基于PDY-FL的器件的PCE略低,为14.13%,但它们实现了显著更高的COS,为23.45%,这是报道的仅含柔性连接体的聚合受体中最高的PCE之一。因此,使用DY-FBrL和PDY-FL制造的IS-OSCs分别实现了显著的PCE,为14.31%和11.61%。此外,器件的拉伸性从Y6(PCE = 11%时的应变)到DY-FBrL(PCE = 23%时的应变)再到PDY-FL(PCE = 31%时的应变)逐渐提高。本研究提出了一种用于定制电子受体结构的有前途的分子设计策略,为开发具有增强机械性能的高性能IS-OSCs提供了一条新途径。

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