Synergistically Regulating the Conjugation Length and Side Chain on Oligothiophene-Based Fully Nonfused Ring Electron Acceptors for Efficient Organic Solar Cells

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2024-12-04 DOI:10.1021/acsapm.4c0282610.1021/acsapm.4c02826

Renshuang Wu, Xianglin Meng, Qian Yang, Wenjun Zhang, Shuaishuai Shen, Lisi Yang, Miao Li, Yu Chen, Yuanyuan Zhou* and Jinsheng Song*,

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Abstract

Fully nonfused ring electron acceptors (FNEAs) have become a research hotspot due to their simple skeletons and reduced synthetic complexity. In this work, with the assistance of a noncovalent conformational lock, we synthesized four FNEAs based on an oligothiophene unit via synergistically regulating the conjugation length and side-chain engineering, which could effectively tune the molecular conformations, absorption spectra, energy levels, intermolecular interactions, and miscibility with polymer. The blend film PBDB-T:4TO-in forms clear bicontinuous interpenetrating networks and more clear phase separation feature due to the balance between crystallization and miscibility. Hence, PBDB-T:4TO-in devices achieved the highest PCE of 10.38%, while an enhanced power conversion efficiency of 11.63% was obtained with the polymer donor replaced by JD40. Overall, this work provides an effective route for oligothiophene-based FNEA design through fine-tuning the molecular skeleton.

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高效有机太阳能电池中寡硫噻吩基完全不熔融环电子受体的共轭长度和侧链协同调节

完全不熔合环电子受体（FNEAs）因其结构简单、合成复杂性低而成为研究热点。本研究在非共价构象锁的帮助下，通过协同调节偶联长度和侧链工程，我们合成了四个基于寡硫吩单元的FNEAs，可以有效地调节分子的构象、吸收光谱、能级、分子间相互作用和与聚合物的混溶性。共混膜PBDB-T:4TO-in由于在结晶和混相之间取得平衡，形成了清晰的双连续互穿网络和更清晰的相分离特征。因此，PBDB-T:4TO-in器件的PCE最高，达到10.38%，而用JD40取代聚合物供体时，功率转换效率提高了11.63%。总的来说，这项工作为通过微调分子骨架来设计基于寡硫吩的FNEA提供了一条有效的途径。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.