3,5-Dibromoanisole as Multifunctional Solid Additive to Enhance the Performance of Organic Solar Cells
Xingchen Zhang , Qing Guo , Zongtao Wang , Jinsheng Song , Zhi Zheng , Jianlei Han , Erjun Zhou
Chinese Journal of Chemistry ›› 2025, Vol. 43 ›› Issue (19) : 2441 -2448.
Strategic design of solid additives for regulating molecular aggregation and crystallinity in organic photovoltaic systems is crucial for enhancing device efficiency and stability. Herein, we introduce 3,5-dibromoanisole (DBA), a volatile solid additive synergistically integrating halogen and alkoxy functionalities, to optimize the PM6:Y6 active layer. DBA simultaneously interacts with both PM6 and Y6, promoting face-on molecular orientation and fibrillar network formation. Consequently, DBA-treated devices achieve a power conversion efficiency (PCE) of 18.34%, with a short-circuit current density (JSC) of 28.24 mA·cm–2 and a fill factor (FF) of 78.6%, surpassing the control device (PCE = 17.13%). Notably, the DBA additive exhibits exceptional stability and demonstrates broad applicability across multiple material systems. This study establishes a universal framework for designing multifunctional solid additives, paving the way for scalable, high-efficiency organic solar cells (OSCs).
Organic solar cells / Solid additive / Dibromoanisole / Power conversion efficiency / Nonfullerene acceptor
2025 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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