Regulating the crystallization of donor and acceptor to maintain balanced carrier mobility is of great importance to fabricate efficient organic solar cells (OSCs). Herein, the balanced crystallinity between donor and acceptor was finely controlled in blade-coated OSCs. By adding high crystalline FOIC into PBDB-T:ITIC system, a balanced carrier mobility was achieved, resulting in the much improved fill factor. The optimized ternary device exhibits an increased current density, due to the enhanced light-harvesting efficiency with complementary absorption and the morphology change. Morphology characterization demonstrated that the ternary film exhibits a highly balanced crystallinity between the donor and acceptor on account of the formation of acceptor alloy. Moreover, the ternary film not only possesses a small domain size, but also exhibits a high domain purity as compared to both binary films. Encouragingly, a highest power conversion efficiency (PCE) of 10.68% was obtained for the blade-coated ternary OSCs. In addition, the blade-coated flexible large-area (105 mm²) OSC based on PBDB-T:ITIC:FOIC ternary system also exhibits a high PCE of 9.81%, showing great potential in the high-throughput fabrication of OSCs.

调节供体和受体的结晶以维持平衡的载流子迁移对于制造有效的有机太阳能电池（OSC）至关重要。在此，在刮刀涂覆的OSC中精细控制了供体和受体之间的平衡结晶度。通过在PBDB-T：ITIC系统中添加高结晶度FOIC，可以实现平衡的载流子迁移率，从而大大提高了填充系数。经过优化的三元器件由于具有互补吸收和形态变化的增强的光捕获效率而表现出更高的电流密度。形态表征表明，由于受体合金的形成，三元膜在供体和受体之间显示出高度平衡的结晶度。而且，三元膜不仅具有较小的畴尺寸，但是与两种二元膜相比，它也显示出高的畴纯度。令人鼓舞的是，刀片式三元OSC的最高功率转换效率（PCE）为10.68％。此外，刀片涂层的柔性大面积（105毫米²）基于PBDB-T：ITIC：FOIC三元系统的OSC还具有9.81％的高PCE，在OSC的高通量制造中显示出巨大的潜力。