Статья

Effects of Flexible Conjugation-Break Spacers of Non-Conjugated Polymer Acceptors on Photovoltaic and Mechanical Properties of All-Polymer Solar Cells

Qiaonan ChenDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Göteborg, SwedenYung Hee HanDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of KoreaLeandro R. FrancoDepartment of Engineering and Physics, Karlstad University, 65188, Karlstad, SwedenCleber F. N. MarchioriDepartment of Engineering and Physics, Karlstad University, 65188, Karlstad, SwedenZewdneh GeneneDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Göteborg, SwedenC. Moysés AraújoDepartment of Engineering and Physics, Karlstad University, 65188, Karlstad, SwedenJin‐Woo LeeDepartment 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 KoreaJingnan WuDepartment of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, DenmarkDonghong YuDepartment of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, DenmarkDong Jun KimDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of KoreaTaek‐Soo KimDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of KoreaLintao HouSiyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, People's Republic of China. [email protected]Bumjoon J. KimDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea. [email protected]Ergang WangDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Göteborg, Sweden. [email protected]

2022en

ABI

Аннотация

All-polymer solar cells (all-PSCs) possess attractive merits including superior thermal stability and mechanical flexibility for large-area roll-to-roll processing. Introducing flexible conjugation-break spacers (FCBSs) into backbones of polymer donor (PD) or polymer acceptor (PA) has been demonstrated as an efficient approach to enhance both the photovoltaic (PV) and mechanical properties of the all-PSCs. However, length dependency of FCBS on certain all-PSC related properties has not been systematically explored. In this regard, we report a series of new non-conjugated PAs by incorporating FCBS with various lengths (2, 4, and 8 carbon atoms in thioalkyl segments). Unlike common studies on so-called side-chain engineering, where longer side chains would lead to better solubility of those resulting polymers, in this work, we observe that the solubilities and the resulting photovoltaic/mechanical properties are optimized by a proper FCBS length (i.e., C2) in PA named PYTS-C2. Its all-PSC achieves a high efficiency of 11.37%, and excellent mechanical robustness with a crack onset strain of 12.39%, significantly superior to those of the other PAs. These results firstly demonstrate the effects of FCBS lengths on the PV performance and mechanical properties of the all-PSCs, providing an effective strategy to fine-tune the structures of PAs for highly efficient and mechanically robust PSCs.

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Идентификаторы

DOI: 10.1007/s40820-022-00884-8

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar