High-performance Organic Solar Cells Based on Trifluorobenzoic Acid Self-assembled Anode Interfacial Layers

A self-assembled anode interfacial layer was constructed using 3,4,5-trifluorobenzoic acid (3FBA). Compared with traditional anode interfacial layers including PEDOT:PSS and MoO3, the 3FBA interfacial layer has higher transmittance and better hydrophobicity. Organic solar cells based on the 3FBA anode interfacial layers achieved high short-circuit current density of 26.86 mA/cm(2) and power conversion efficiency (PCE) of 18.16%, significantly excelling devices based on PEDOT:PSS (26.28 mA/cm(2), 17.62%)and devices based on MoO3 (26.00 mA/cm(2), 17.15%). This work provides a new idea for the design and construction of the anode interfacial layers of organic solar cells.