通过三元共聚化策略微调内部/分子间相互作用,以获得高效的聚合物供体
Liqing Li1, Mingming Que1,2, Yu Fang1
1Jiangxi Province Key Laboratory of Functional Crystalline Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, 156 Ke Jia Avenue, Ganzhou, 341000, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 6, 2025
概括
在聚合物捐赠体中引入第三个成分,二二二三基基素 (ff-Qx),可以增强分子平面性和相互作用. 这一策略导致聚合物太阳能电池的功率转换效率创纪录.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 聚合物化学 聚合物化学
背景情况:
- 三元共聚合是一种提高器件中聚合物供体性能的策略.
- 聚合物捐赠者可以由于不规则结构而对分子堆叠和电荷运输产生负面影响.
研究的目的:
- 通过将二二-3-六甲基) 素 (ff-Qx) 纳入PM6骨干来开发新型聚合物.
- 研究ff-Qx对分子平面性,分子内相互作用和与受体的分子间相互作用的影响.
主要方法:
- 合成了两种聚合物,即 PBBQ-5 (5% ff-Qx) 和 PBBQ-10 (10% ff-Qx).
- 用L8-BO混合聚合物,并分析混合膜的特性,如可混合性,相位分离和分子包装.
- 聚合物太阳能电池的制造和性能测试.
主要成果:
- ff-Qx单元引入了N···S非共价的分子内相互作用,增强了分子平面性和分子内相互作用.
- 聚合物表现出可调节的静电电位 (ESP) 值,影响与受体的分子间相互作用.
- PBBQ-5:L8-BO混合膜显示出更好的可混合性,最佳相位分离,以及有序的分子包装.
- 基于PBBQ-5的设备在基于诺素的聚合物太阳能电池中实现了创纪录的功率转换效率 (PCE) 19.54%.
结论:
- 该研究强调了传统聚合物的缺点,并提出了克服这些缺点的策略.
- 通过合理的聚合物设计优化内部/分子间相互作用是高性能聚合物捐赠者的可行途径.
- 这项工作为诺素基聚合物太阳能电池设定了新的基准.
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