The pursuit of sustainable manufacturing for organic solar cells (OSCs) has prompted the exploration of environmentally friendly, non-halogenated solvents. However, contemporary OSCs processed with these solvents often require the inclusion of toxic halogenated additives to optimize photovoltaic performance. In this study, we devised a processing method that incorporates not only a non-halogenated solvent but also a non-halogenated additive. The introduction of the eco-friendly menthol (MT) effectively mitigates detrimental disordered aggregation during film formation by leveraging its strong polarity to enhance acceptor crystallization, thereby optimizing the donor–acceptor morphology. These advancements ultimately lead to more efficient exciton dissociation and charge carrier transport, resulting in the realization of large-area organic photovoltaic modules (19.31 cm²) with a notable power conversion efficiency (PCE) of 15.74%. To the best of our knowledge, this PCE represents the highest reported value for large-area modules processed with non-halogenated solvents and is comparable to state-of-the-art organic photovoltaic modules processed with conventional halogenated solvents. This research underscores the significant potential of fully non-halogenated processing in achieving sustainable manufacturing for high-performance OSCs.

中文翻译：

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环保型挥发性添加剂，可实现使用非卤化溶剂加工的高效大面积有机光伏组件

对有机太阳能电池（OSC）可持续制造的追求促使人们探索环保、非卤化溶剂。然而，用这些溶剂加工的当代 OSC 通常需要包含有毒的卤化添加剂以优化光伏性能。在这项研究中，我们设计了一种加工方法，不仅包含非卤化溶剂，还包含非卤化添加剂。环保型薄荷醇（MT）的引入，利用其强极性增强受体结晶，有效减轻成膜过程中有害的无序聚集，从而优化供体-受体形态。这些进步最终导致更有效的激子解离和载流子传输，从而实现了大面积有机光伏模块（19.31 cm ²），其功率转换效率（PCE）高达15.74%。据我们所知，该 PCE 代表了使用非卤化溶剂处理的大面积模块的最高报告值，并且与使用传统卤化溶剂处理的最先进的有机光伏模块相当。这项研究强调了完全非卤化加工在实现高性能 OSC 可持续制造方面的巨大潜力。