当前位置:
X-MOL 学术
›
Adv. Funct. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Linkage Regulation of Back-To-Back Connected Dimers as Guest Acceptors Enables Organic Solar Cells with Excellent Efficiency, Stability and Flexibility
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-18 , DOI: 10.1002/adfm.202414803
Shiyong You 1 , Youhui Zhang 2 , Bin Huang 3 , Sang Young Jeong 4 , Xiaozhong Shuai 1 , Shuiyuan Huang 1 , Han Young Woo 4 , Feiyan Wu 1 , Lie Chen 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-18 , DOI: 10.1002/adfm.202414803
Shiyong You 1 , Youhui Zhang 2 , Bin Huang 3 , Sang Young Jeong 4 , Xiaozhong Shuai 1 , Shuiyuan Huang 1 , Han Young Woo 4 , Feiyan Wu 1 , Lie Chen 1
Affiliation
![]() |
High efficiency, stability, and flexibility are key prerequisites for the commercial applications of organic solar cells (OSCs). Herein, three back-to-back connected dimers (2Qx-TT, 2Qx-C3, 2Qx-C6) are developed as the guest acceptors for OSCs with improved comprehensive performance. By regulating the linkage from rigid bithiophene to flexible alkyl chain, the back-to-back connected dimers display quite different molecular geometry and intermolecular interactions, consequently influencing their packing arrangement, film-forming process, carrier mobilities, and the device efficiency, stability, and flexibility. By introducing these dimer acceptors as the guest into active layer, these dimers form alloy phases with the host acceptor, promoting film-forming process and charge dynamics. All ternary devices exhibit improved PCEs of over 18% than the control binary device. Among them, 2Qx-C3-based ternary device obtains the best efficiency of as high as 19.03%. Moreover, thanks to the stronger entanglement favored by the dimers with flexible linkage, the PM6:BTP-eC9:2Qx-C3-based device shows outstanding stability and flexibility. The flexible device displays an improved PCE of 16.09% with a crack-onset strain of 15.0%, showing excellent mechanical robustness close to the all-polymer devices. This work demonstrates the potential of the back-to-back connected dimer acceptors as the guest for highly efficient, stable and flexible OSCs.
中文翻译:
背靠背连接的二聚体作为客体受体的键控使有机太阳能电池具有优异的效率、稳定性和灵活性
高效率、稳定性和灵活性是有机太阳能电池 (OSC) 商业应用的关键先决条件。在此,开发了三个背靠背连接的二聚体 (2Qx-TT、2Qx-C3、2Qx-C6) 作为 OSC 的客体受体,具有更好的综合性能。通过调节从刚性联噻吩到柔性烷基链的键,背靠背连接的二聚体表现出完全不同的分子几何形状和分子间相互作用,从而影响它们的堆积排列、成膜过程、载流子迁移率以及器件的效率、稳定性和灵活性。通过将这些二聚体受体作为客体引入活性层,这些二聚体与主体受体形成合金相,促进成膜过程和电荷动力学。所有三元器件的 PCE 都比对照二元器件高出 18% 以上。其中,基于 2Qx-C3 的三元器件获得效率最高,高达 19.03%。此外,由于具有灵活键的二聚体有利于更强的纠缠,基于 PM6:BTP-eC9:2Qx-C3 的器件表现出出色的稳定性和灵活性。柔性器件的 PCE 提高了 16.09%,裂纹起始应变为 15.0%,显示出接近全聚合物器件的出色机械坚固性。这项工作证明了背靠背连接的二聚体受体作为高效、稳定和灵活的 OSC 客体的潜力。
更新日期:2024-09-18
中文翻译:

背靠背连接的二聚体作为客体受体的键控使有机太阳能电池具有优异的效率、稳定性和灵活性
高效率、稳定性和灵活性是有机太阳能电池 (OSC) 商业应用的关键先决条件。在此,开发了三个背靠背连接的二聚体 (2Qx-TT、2Qx-C3、2Qx-C6) 作为 OSC 的客体受体,具有更好的综合性能。通过调节从刚性联噻吩到柔性烷基链的键,背靠背连接的二聚体表现出完全不同的分子几何形状和分子间相互作用,从而影响它们的堆积排列、成膜过程、载流子迁移率以及器件的效率、稳定性和灵活性。通过将这些二聚体受体作为客体引入活性层,这些二聚体与主体受体形成合金相,促进成膜过程和电荷动力学。所有三元器件的 PCE 都比对照二元器件高出 18% 以上。其中,基于 2Qx-C3 的三元器件获得效率最高,高达 19.03%。此外,由于具有灵活键的二聚体有利于更强的纠缠,基于 PM6:BTP-eC9:2Qx-C3 的器件表现出出色的稳定性和灵活性。柔性器件的 PCE 提高了 16.09%,裂纹起始应变为 15.0%,显示出接近全聚合物器件的出色机械坚固性。这项工作证明了背靠背连接的二聚体受体作为高效、稳定和灵活的 OSC 客体的潜力。