Flexible Linker Engineering of Dimeric Acceptors Enables Synergistic Modulation of Dielectric Constant and Spatial Conjugation for Organic Solar Cells Exceeding 20% Efficiency.
The performance of organic solar cells (OSCs) is predominantly constrained by the low dielectric constants of organic semiconductors, which limit exciton dissociation and exacerbate charge recombination. In particular, dimeric acceptor molecules (DMAs) typically suffer from insufficient short-circuit current density an...