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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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.