活动层
材料科学
能量转换效率
三元运算
接受者
有机太阳能电池
光电子学
开路电压
图层(电子)
光活性层
纳米技术
电压
聚合物太阳能电池
复合材料
聚合物
物理
凝聚态物理
量子力学
计算机科学
程序设计语言
薄膜晶体管
作者
Xiaodong Si,Xiangjian Wan,Wendi Shi,Ruohan Wang,Kun Ma,Yunxin Zhang,Simin Wu,Zhaoyang Yao,Yongsheng Chen,Xiangjian Wan,Yongsheng Chen
标识
DOI:10.1002/adfm.202306471
摘要
Abstract The efficiency of organic solar cells (OSCs) is primarily limited by their significant nonradiative energy loss and unfavorable active layer morphology. Achieving high‐efficiency OSCs by suppressing nonradiative energy loss and tuning the active layer morphology remains a challenging task. In this study, an acceptor named CH‐ThCl is designed, featuring an extended conjugation central core, dichlorodithienoquinoxaline. The incorporation of chlorine‐substituted extended conjugation in the central core enhances the acceptor's rigidity and promotes J‐aggregation, leading to improved molecular luminescent efficiency and a reduction in nonradiative energy loss. A binary device based on PM6: CH‐ThCl demonstrates a power conversion efficiency (PCE) of 18.16% and exhibits a high open‐circuit voltage ( V oc ) of 0.934 V, attributed to the remarkably low nonradiative energy loss of 0.21 eV. Furthermore, a ternary device is fabricated by incorporating CH‐6F as the third component, resulting in a significantly enhanced PCE of 18.80%. The ternary device exhibits improvements in short‐circuit current ( J sc ) and fill factor (FF) while maintaining the V oc , primarily due to the optimized active layer morphology. These results highlight the effectiveness of combining the reduction of nonradiative energy loss and precise tuning of the active layer morphology as a viable strategy for achieving high‐efficiency OSCs.
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