Non-fused ring electron acceptors with varied substituents were developed to construct efficient organic solar cells (OSCs). Out-of-plane rigid substituents such as 2-methylphenyl, 2-tert-butylphenyl and diphenylamine were introduced to the central benzene unit to improve the solubility of non-fused ring acceptors and noncovalent interactions such as O⋯S and N⋯S were used to enhance the planarity of molecular backbones. Blend films based on PBDB-T and these acceptors displayed better morphology without oversized aggregates formed. As-cast devices based on SM1, SM2 and SM3 exhibited power conversion efficiencies of 5.96%, 6.43% and 6.80%, respectively.

已开发出具有各种取代基的非稠合环电子受体，以构建有效的有机太阳能电池（OSC）。将平面外刚性取代基（例如2-甲基苯基，2-叔丁基苯基和二苯胺）引入中心苯单元以提高非稠合环受体的溶解度，并且非共价相互作用（例如O⋯S和N⋯S）用于增强分子骨架的平面性。基于PBDB-T和这些受体的共混膜表现出更好的形态，没有形成过大的聚集体。基于SM1，SM2和SM3的铸造设备的功率转换效率分别为5.96％，6.43％和6.80％。