材料科学
有机太阳能电池
烷氧基
接受者
纳米技术
光伏
三元运算
分子
化学物理
化学
聚合物
计算机科学
光伏系统
有机化学
复合材料
生态学
烷基
物理
生物
程序设计语言
凝聚态物理
作者
Baobing Fan,Huanhuan Gao,Liyang Yu,Ruipeng Li,Lei Wang,Wenkai Zhong,Yunfan Wang,Wenlin Jiang,Huiting Fu,Tianqi Chen,Bin Kan,Sai‐Wing Tsang,Alex K.‐Y. Jen
标识
DOI:10.1002/anie.202418439
摘要
Oligomeric acceptors (OAs) have attracted considerable attention in the organic photovoltaics (OPV) field owing to their capacity in balancing the merits from both monomeric and polymeric acceptors. A delicate control over the distortion between blocks of OAs usually determines the performance and stability of relevant OPV devices. However, it imposes great complexity to realize a controllable degree of distortion by tuning the skeleton of blocks and the position of linker between blocks. Herein, we developed a facile strategy to rationally control the geometry distortion of OAs via a straightforward substitution of alkoxy side‐chains on their blocks. This helps elucidate the integrated influences of molecular distortion and non‐bonded contacts on the selective interactions between OA molecules and between OA and host acceptor in ternary blend. We demonstrate the alkoxy‐OA molecules having stronger self‐interactions would mitigate their interactions with host acceptor, therefore alleviating the kinetic diffusion and excessive aggregation of total acceptors. Combining with a composite‐interlayer strategy by introducing a phenyl‐substituted self‐assembled monolayer to enhance the doping with polyoxometalate, an impressive efficiency of 20.1% is achieved accompanied by a negligible burn‐in loss against physical aging. This study demonstrates the validation of tuning of selective interactions towards high‐performance and burn‐in‐free OPV.
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