Advances in organic photovoltaic technologies have always been closely associated with a deeper understanding of bulk-heterojunction (BHJ) microstructure morphology, which is generally governed by the ink-formulation based on a single solvent or solvent mixtures. The relatively slow progress in all-polymer solar cells (all-PSCs) is mainly due to the significant difficulty in mastering their intricate BHJ morphology dealing with entanglements of polymer chains, limiting their performance typically to 8–10%. In this work, we demonstrate that the performance of all-PSCs can be further developed to a benchmark value of 11% by manipulating the BHJ morphology using a green solvent system based on cyclopentyl methyl ether (CPME). The generic applicability of the superior ink-formulation is successfully validated in four different all-polymer solar cells, exhibiting great promise of advancing all-PSCs towards industrial production and commercialization.

中文翻译：

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通用的绿色溶剂概念将全聚合物太阳能电池的功率转换效率提高到11％†

有机光伏技术的进步一直与对本体异质结（BHJ）微观结构形态的更深入了解密切相关，而本体异质结（BHJ）微观结构形态通常是由基于单一溶剂或溶剂混合物的油墨配方决定的。全聚合物太阳能电池（all-PSC）的进展相对较慢，主要是由于难以掌握复杂的BHJ形态来处理聚合物链的缠结，因此其性能通常限制在8％至10％之间。在这项工作中，我们证明了通过使用基于环戊基甲基醚（CPME）的绿色溶剂体系处理BHJ形态，可以将全PSC的性能进一步提高到11％的基准值。在四种不同的全聚合物太阳能电池中，成功验证了优异的油墨配方的通用性，