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In recent years,non-fullerene electron acceptors (NFAs) have gained widespread attention in the field of organic photovoltaics.At present,the efficiency of bulk heterojunctions (BHJs) organic solar cells based on non-fullerene electron acceptors has exceeded 18%.In order to overcome some of the limitations of the binary system,the high-efficiency ternary strategy has wide applicability in improving the performance of solar cell devices.We introduced IDIC as the third component in PM6∶Y6 and PM6∶IT-4F to construct ternary organic solar cells.The HOMO and LUMO energy levels of IDIC are between PM6,Y6 and IT-4F,which can form a better cascade energy level,which is conducive to carrier transmission;and IDIC itself has strong crystallinity,so it is appropriate.The introduction of IDIC can well adjust the morphology of the active layer,facilitate the dissociation of excitons,and further improve device performance.The PCE of the ternary system has increased from 12.88% of the binary system to 14.03% and 15.45% to 16.51%.Therefore,the ternary strategy has certain applicability in the field of organic photovoltaics.