Non-covalent Intramolecular Interactions Induced High-Performance Terpolymer Donors,Advanced Functional Materials

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.)

Non-covalent Intramolecular Interactions Induced High-Performance Terpolymer Donors
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-14 , DOI: 10.1002/adfm.202312545
Jiayong Lu ₁ , Junran Wu ₁ , Bin Huang ₁ , Yu Fang ₁ , Xiangmeng Deng ₁ , Jialin Zhang ₁ , Shanshan Chen ₂ , Seonghun Jeong ₃ , Jinbiao Liu ₁ , Changduk Yang ₃

Affiliation

Ternary polymerization are demonstrated as a feasible and successful method of optimizing absorption, energy level, and crystallinity by maintaining the excellent properties of a polymer matrix. However, the third unit inevitably interrupts the periodic sequence distribution of the ordering packing of conjugated backbones, and thus balancing the trade-off between the advantages of the third component and the disruption caused by the nonperiodic sequence distribution remains a great challenge. Herein, two terpolymer donors L1 and L2 are developed by introducing diethyl-5,5′“-dibromo-4,4′”-bis(2-ethylhexyl)-[2,2′:5′,2′'-terthiophene]-3′,4′-dicarboxylate (DDT) unit as the third component. Owing to the electron-deficient ability and S···O non-covalent intramolecular interactions of DDT, terpolymers L1 and L2 displays deeper energy levels, enhanced molecular rigidity, and planarity than PM6. After blending with L8-BO, the L1-based polymer solar cells exhibit well miscibility with L8-BO, leading to a more well-defined nanofibrous morphology, face-on orientation, and a slight energy loss in the blend films. As a result, the optimized L1:L8-BO-based device achieves a record power conversion efficiency (PCE) as high as 18.75%. This work provides a feasible strategy to develop high-performance polymer donors via utilizing S···O non-covalent intramolecular interactions to improve the planarity of polymer donors.

中文翻译：

非共价分子内相互作用诱导高性能三元共聚物供体

三元聚合被证明是一种通过保持聚合物基体的优异性能来优化吸收、能级和结晶度的可行且成功的方法。然而，第三单元不可避免地中断了共轭主链有序堆积的周期序列分布，因此平衡第三组件的优点与非周期序列分布造成的破坏之间的权衡仍然是一个巨大的挑战。本文通过引入二乙基-5,5'“-二溴-4,4'”-双(2-乙基己基)-[2,2':5',2''-三噻吩]开发了两种三元共聚物供体L1和L2 -3',4'-二羧酸酯（DDT）单元作为第三组分。由于DDT的缺电子能力和S·O非共价分子内相互作用，三元共聚物L1和L2比PM6表现出更深的能级、增强的分子刚性和平面性。与 L8-BO 共混后，基于 L1 的聚合物太阳能电池表现出与 L8-BO 良好的混溶性，从而导致共混膜具有更清晰的纳米纤维形态、正面取向和轻微的能量损失。结果，优化后的基于 L1:L8-BO 的器件实现了高达 18.75% 的创纪录功率转换效率 (PCE)。该工作为利用S·O非共价分子内相互作用来提高聚合物供体的平面度来开发高性能聚合物供体提供了可行的策略。

更新日期：2023-12-14

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南