Designing simple non-fused terthiophene-based electron acceptors for efficient organic solar cells

作     者：Jiayu Li Kun Li Zhe Mei Yu Chen Qian Xie Chenxu Yu Xuefeng Liu Yanqi Wang Yishi Wu Qing Liao Cunbin An Hongbing Fu 

作者机构：Beijing Key Laboratory for Optical Materials and Photonic DevicesDepartment of ChemistryCapital Normal UniversityBeijing 100048China Beijing Synchrotron Radiation LaboratoryInstitute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2024年第96卷第9期

页      面：501-508页

核心收录：

学科分类：08[工学] 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 Beijing Natural Science Foundation of China(Z230019,2212005) the National Natural Science Foundation of China(NSFC 22173062,21833005,22090022 and 22275125) 

主　　题：Organic solarcells Low cost Terthiophene Non-fused electron acceptor 

摘      要：Low-cost photovoltaic materials are essential for realizing large-scale commercial applications of organic solar cells(OSCs).However,highly efficient OSCs based on low-cost photovoltaic materials are scarce due to a deficiency in understanding the structure-property ***,we investigated two low-cost terthiophene-based electron acceptors,namely,3TC8 and 3TEH,with 3,4-bis(octan-3-yloxy)thiophene,differing only in the alkylated *** acceptors exhibit low optical gaps(∼1.43 eV)and possess deep highest occupied molecular orbital(HOMO)levels(∼−5.8 eV).Notably,the single-crystal structure of 3TEH demonstrates highly planar conjugated backbone and strongπ-πstacking between intermolecular terminal groups,attributed to the presence of the bulky alkylated noncovalently conformational *** utilizing both acceptors to fabricate OSCs,the 3TC8-based device exhibited a power conversion efficiency(PCE)of 11.1%,while the 3TEH-based OSC demonstrated an excellent PCE of 14.4%.This PCE is the highest among OSCs based on terthiophene-containing electron *** results offer a new strategy for designing low-cost electron acceptors for highly efficient OSCs.