A fused-ring non-fullerene acceptor based on a benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene central core with a thieno[3,2-<i>b</i>]thiophene side-chain for highly efficient organic solar cells
作者:Yu Jia、Yun Zhang、Wei Jiang、Bin Su、Chunbo Liu、Enwei Zhu、Guangbo Che
DOI:10.1039/c9ta01888c
日期:——
a smaller optical bandgap (1.47 eV). The BTT-FIC/PM6 based device achieved a champion PCE of 12.65% for benzo[1,2-b:4,5-b′]di(cyclopenta[2,1-b:3,4-b′]dithiophene)-containing NFA based organic solar cells (OSCs), while the BTT-FIC/PM6 based device delivered a PCE of 10.04% with a high Voc of over 1 V. Fluorinated IC is more suitable for this new core BTT than methyl substituted IC, because fluorine atoms
基于苯并[1,2- b:4,5- b ']二噻吩和噻吩[3,2- b ]噻吩侧链的新型富电子中心核(BTT)与甲基和氟改性的1 ,1-二氰基亚甲基-3-茚满酮(IC)的吸电子端基提供两个新颖的非富勒烯受体(NFA),即BTT-MIC和BTT-FIC。与BTT-MIC相比,BTT-FIC展示了更强的近红外(NIR)吸收和更小的光学带隙(1.47 eV)。基于BTT-FIC / PM6的设备对苯并[1,2- b:4,5- b '] di(cyclopenta [2,1- b:3,4- b']二噻吩)含基于NFA的有机太阳能电池(OSC),而基于BTT-FIC / PM6装置递送的10.04%的PCE具有高V OC的超过1 V.氟化IC是更适合这个新的核心BTT与甲基取代的IC相比,因为氟原子增强了电荷传输(CT)态(吸收),并且也对激子解离,电荷迁移率和形貌都有好处。这项工作表明,具有噻吩并[3