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

doi:10.1002/cjoc.70127

Chinese Journal of Chemistry ›› 2025, Vol. 43 ›› Issue (19) : 2441 -2448. DOI: 10.1002/cjoc.70127

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3,5-Dibromoanisole as Multifunctional Solid Additive to Enhance the Performance of Organic Solar Cells

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Abstract

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 (J_SC) 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).

Keywords

Organic solar cells / Solid additive / Dibromoanisole / Power conversion efficiency / Nonfullerene acceptor

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Xingchen Zhang, Qing Guo, Zongtao Wang, Jinsheng Song, Zhi Zheng, Jianlei Han, Erjun Zhou. 3,5-Dibromoanisole as Multifunctional Solid Additive to Enhance the Performance of Organic Solar Cells. Chinese Journal of Chemistry, 2025, 43(19): 2441-2448 DOI:10.1002/cjoc.70127