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Статья

Binary Organic Solar Cells with >19.6% Efficiency: The Significance of Self-Assembled Monolayer Modification

Xiaokang SunHoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen 518055, People’s Republic of ChinaXiaoman DingHoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen 518055, People’s Republic of ChinaFei WangHoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen 518055, People’s Republic of ChinaJie LvHoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen 518055, People’s Republic of ChinaChuanlin GaoCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, People’s Republic of ChinaGuangye ZhangCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, People’s Republic of ChinaXiaoping OuyangSchool of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, People’s Republic of ChinaGang LiDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Kowloon, Hong Kong 999077, People’s Republic of ChinaHanlin HuHoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen 518055, People’s Republic of China
2024en
ABI

Аннотация

Improving the uniformity and density of self-assembled monolayers (SAMs) is crucial to elevate the photovoltaic performance of organic solar cells (OSCs). Herein, we introduced the small molecules 1-hydroxybenzotriazole (HOBT) to modulate the distribution and electrical properties of (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (4PADCB) on indium tin oxide (ITO) transparent electrodes in an innovative manner. The hydroxyl group of HOBT interacts with the phosphate group of SAMs, while the steric repulsion exerted by the HOBT backbone efficiently regulates the distribution of SAMs. This led to a more uniform and dense distribution of SAMs on ITO. Furthermore, HOBT-modified SAMs have improved the crystallization and vertical phase separation of the upper active layer. Consequently, the PM6:BTP-eC9 binary OSCs based on HOBT-modified SAMs exhibit an impressive PCE of 19.66%. Our work presents an effective strategy for regulating the SAM morphology and offers a promising approach for advancing OSCs.

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Идентификаторы

DOI
10.1021/acsenergylett.4c01564

Цитирования и источники

Цитирований: 2Использованных источников: 0
Показатели — AkademScholar