Jiangtong Zhao, Xinrong Yang, Yiming Shao, Rui Sun, Jie Min
{"title":"Simultaneously improving efficiency and stability of organic solar cells by enhancing molecular crystallinity and intermolecular interactions","authors":"Jiangtong Zhao, Xinrong Yang, Yiming Shao, Rui Sun, Jie Min","doi":"10.1007/s40843-024-3074-6","DOIUrl":null,"url":null,"abstract":"<p>Precisely controlling bulk heterojunction (BHJ) morphology through molecular design is one of the main longstanding challenges in developing high-performance organic solar cells (OSCs). Herein, three small molecule acceptors (SMAs) with different side chains (methyl, 2-ethylhexyl, and 2-decyl tetradecyl on benzotriazole unit), namely R-M, R-EH, R-DTD, were designed and synthesized. Such side-chain engineering can effectively modulate the intermolecular interactions between acceptor/acceptor (A/A) and donor/A (D/A) molecules, thereby fine-tuning the bulk microstructures of BHJ active layer systems. Compared with R-M and R-DTD, R-EH shows stronger A/A and D/A interactions with donor PM6, which delivers improved BHJ networks with better molecular ordering, enhancing charge transport and extraction properties. Consequently, PM6:R-EH not only performs a competitive device efficiency of over 18% but also exhibits excellent operation stability without obvious degradation behaviors among the three systems. This study deepens the synergistic effects of A/A and D/A interactions on BHJ morphology to achieve industrially viable OSCs with high device efficiency and stability.</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":6.8000,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40843-024-3074-6","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Precisely controlling bulk heterojunction (BHJ) morphology through molecular design is one of the main longstanding challenges in developing high-performance organic solar cells (OSCs). Herein, three small molecule acceptors (SMAs) with different side chains (methyl, 2-ethylhexyl, and 2-decyl tetradecyl on benzotriazole unit), namely R-M, R-EH, R-DTD, were designed and synthesized. Such side-chain engineering can effectively modulate the intermolecular interactions between acceptor/acceptor (A/A) and donor/A (D/A) molecules, thereby fine-tuning the bulk microstructures of BHJ active layer systems. Compared with R-M and R-DTD, R-EH shows stronger A/A and D/A interactions with donor PM6, which delivers improved BHJ networks with better molecular ordering, enhancing charge transport and extraction properties. Consequently, PM6:R-EH not only performs a competitive device efficiency of over 18% but also exhibits excellent operation stability without obvious degradation behaviors among the three systems. This study deepens the synergistic effects of A/A and D/A interactions on BHJ morphology to achieve industrially viable OSCs with high device efficiency and stability.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.