Efficient organic photovoltaic cells (OPVs) are fabricated using two structurally similar Y6 derivations (BTP‐BO‐4F and Y6‐1O) as acceptor and PM6 as donor. The two binary OPVs exhibit a high fill factor (FF) (>76%), the complementary short‐circuit‐current density (J_SC) and open‐circuit voltage (V_OC). The high FFs of binary OPVs indicate the good compatibility of corresponding materials to form efficient charge transport channels. A power conversion efficiency (PCE) of 17.59% is obtained from ternary OPVs with 15 wt% Y6‐1O in acceptors, benefiting from the simultaneously improved J_SC of 26.13 mA cm⁻², a V_OC of 0.860 V, and an FF of 78.26%. The values of V_OC of ternary OPVs can be gradually increased along with the incorporation of Y6‐1O, suggesting the preferred formation of an alloyed state between BTP‐BO‐4F and Y6‐1O due to their good compatibility. Meanwhile, the cascaded energy levels of BTP‐BO‐4F and Y6‐1O can form efficient electron transport channels in ternary active layers. The main contribution of Y6‐1O can be summarized as enhancing photon harvesting, optimizing phase separation, and adjusting molecular arrangement. The experimental results may provide new insight on developing efficient ternary OPVs by selecting two well‐compatible acceptors.

中文翻译：

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具有两个兼容的Y6衍生物的三元有机光伏电池，其效率达到17.59％

使用两种结构相似的Y6衍生物（BTP-BO-4F和Y6-1O）作为受体，以PM6作为供体，制造出了高效的有机光伏电池（OPV）。两个二进制OPV具有较高的填充系数（FF）（> 76％），互补的短路电流密度（J _SC）和开路电压（V _OC）。二元OPV的高FF值表明相应的材料具有良好的兼容性，可以形成有效的电荷传输通道。得益于Y6-1O含量为15 wt％的三元OPV，功率转换效率（PCE）为17.59％，这得益于同时提高的J _SC为26.13 mA cm ^-2，V _OC为0.860 V和FF为78.26％。的值随着Y6-1O的引入，三元OPV的V _OC可以逐渐增加，这表明由于BTP-BO-4F和Y6-1O之间的良好相容性，它们优选形成合金态。同时，BTP-BO-4F和Y6-1O的级联能级可以在三元活性层中形成有效的电子传输通道。Y6-1O的主要贡献可以概括为增强光子收集，优化相分离和调整分子排列。通过选择两个良好相容的受体，实验结果可能为开发有效的三元OPV提供新的见解。