10- 18 In both cases, the fused core facilitates π-electron delocalization and improves the π–π stacking between molecules, hence enhancing the intrinsic charge carrier mobility. Common donor units include 4,9-dihydro- s-indacenodithiophene (IDT) 5- 9 and 6,12-dihydro-dithienoindeno- s-indacenodithiophene (IDTT). Among the highest performing NFAs, linear rod-like acceptor–donor–acceptor (A–D–A) structures incorporating fused ladder-type aromatics have attracted much interest. 1- 4 A range of new NFAs with different building blocks and geometrical dimensions has been designed to boost the power conversion efficiency (PCE) of OSCs.
The development of nonfullerene acceptors (NFAs), which are used to replace fullerene derivatives in organic solar cells (OSCs) due to their extended light absorption and tunable energy levels, has seen impressive progress in the past few years.
0 kommentar(er)
