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From environmental, health, and safety perspectives coupled with industrial scalability requirements, there exists a critical need to replace hazardous halogenated solvents, such as chloroform (CF), which are conventionally employed in high\u2010performance OSC fabrication, with more environmentally friendly non\u2010halogenated alternatives. Current challenges in room\u2010temperature processing using non\u2010halogenated solvents primarily stem from three interrelated factors: inadequate solubility of photoactive materials, excessive molecular aggregation, and disordered stacking morphology, all of which collectively degrade device performance. This review systematically examines the processing of non\u2010halogenated solvents for OSCs in the following three critical aspects: first, this review focuses on the classification and selection of processing solvents and the impact on the morphology of the active layer. 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