Статья

Linker Engineering of Dimerized Small Molecule Acceptors for Highly Efficient and Stable Organic Solar Cells

Jin‐Woo LeeDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaCheng SunDepartment of Chemistry and RINS, Gyeongsang National University, Jinju 52828, Republic of KoreaChangyeon LeeSchool of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 06974, Republic of KoreaZhengping TanDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaTan Ngoc‐Lan PhanDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaHyesu JeonDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaDa-Hyun JeongDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaSoon‐Ki KwonDepartment of Materials Engineering and Convergence Technology and ERI, Gyeongsang National University, Jinju 52828, Republic of KoreaYun‐Hi KimDepartment of Chemistry and RINS, Gyeongsang National University, Jinju 52828, Republic of KoreaBumjoon J. KimDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea

2023en

ABI

Аннотация

High power conversion efficiency (PCE) and long-term stability are important requirements for commercialization of organic solar cells (OSCs). In this study, we demonstrate efficient (PCE = 18.60%) and stable (t80% lifetime > 4000 h) OSCs by developing a series of dimerized small-molecule acceptors (DSMAs). We prepared three different DSMAs (DYT, DYV, and DYTVT) by using different linkers (i.e., thiophene, vinylene, and thiophene– vinylene– thiophene), to connect their two Y-based building blocks. We find that the crystalline properties and glass transition temperature (Tg) of DSMAs can be systematically modulated by the linker selection. A DYV-based OSC achieves the highest PCE (18.60%) among the DSMA-based OSCs owing to the appropriate backbone rigidity of DYV, leading to an optimal blend morphology and high electron mobility. Importantly, the DYV-based OSC also demonstrates excellent operational stability under 1-sun illumination, i.e., a t80% lifetime of 4005 h.

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Идентификаторы

DOI: 10.1021/acsenergylett.2c02679

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar