A Potential Perylene Diimide Dimer-Based Acceptor Material for Highly Efficient Solution-Processed Non-Fullerene Organic Solar Cells with 4.03% Efficiency

摘要

Great progress has been made on solution-processed, bulk-heterojunction (BHJ) fullerene-based organic solar cells (OSCs), and the reported power conversion efficiency (PCE) recently increased up to ca. 8% for small-molecule- and ca. 9% for polymer-based OSCs and approached ca. 10% for tandem devices. Along with these fast advances in the small-molecule and conjugate-polymer donor materials and device configurations, many efforts have also been made on chemical modification of the fullerene backbone, for example, to tune the energy level of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) through bis-adducts, endohedral, and indene functionalizations.