Trialkylsilyl-thiophene-conjugated acceptor for efficient organic solar cells compatible with spin-coating and blade-coating technologies

作     者：Tengfei Li Qiang Wu Ze-Fan Yao Hairui Bai Wenyan Su Rui Sun Lingxiao Tang Zhaozhao Bi Xiaojun Li Weiguo Zhu Jie Min Qunping Fan Wei Ma 

作者机构：State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China School of Materials Science and EngineeringXi’an University of Science and TechnologyXi’an 710054China Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and ApplicationsSchool of Materials Science and Engineeringand Changzhou UniversityChangzhou 213164China College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China The Institute for Advanced StudiesWuhan UniversityWuhan 430072China Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of Chemistry Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2024年第67卷第12期

页      面：4184-4193页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(22209131,22005121,21875182,52173023) the National Key Research and Development Program of China(2022YFE0132400) the Key Scientific and Technological Innovation Team Project of Shaanxi Province(2020TD-002) the 111 Project 2.0(BP0618008) 

主　　题：sidechain engineering organic solar cells blade-coating spin-coating power conversion efficiency 

摘      要：Sidechain engineering as an efficient and convenient strategy has been widely used to optimize molecular structure of photovoltaic materials for boosting power conversion efficiency(PCE)of organic solar cells(OSCs).Herein,a new Y-series acceptor named Y-Th Si with trialkylsilyl-substituted thiophene as conjugated sidechain is *** with its parental Y6 with multiple intermolecular interactions,Y-Th Si has a unitary molecular packing due to the additional steric hindrance from twodimensional(2D)-conjugated ***,Y-Th Si shows an obviously blue-shifted absorption with an onset of~850 nm but significantly up-shifted lowest unoccupied molecular orbital energy *** the PM6:Y-Th Si pair,the spin-coating OSCs achieve a decent PCE of 14.56%with an impressively high photovoltage(V_(OC))of 0.936 *** by its high V_(OC)and narrow absorption,Y-Th Si is introduced into near-infrared absorbing binary PM6:BTP-eC9 host to construct ternary *** to the complementary absorption,optimized morphology,and minimized energy loss properties,the PM6:BTP-e C9:Y-Th Si-based OSCs offer a higher PCE of 18.34%.Moreover,our developed strategy can overcome the commonly existed PCE drop when the blade-coating towards large-scale printing is used ***,a comparable PCE of 18.34%is achieved,which is one of the best values for the blade-coating OSCs so far.