Advanced Materials, Vol.27, No.43, 6969-6969, 2015
Organic Solar Cells Based on a 2D Benzo[1,2-b: 4,5-b']difuran-Conjugated Polymer with High-Power Conversion Efficiency
A novel 2D benzodifuran (BDF)-based copolymer (PBDF-T1) is synthesized. Polymer solar cells fabricated with PBDF-T1 show high power conversion efficiency of 9.43% and fill factor of 77.4%, which is higher than the performance of its benzothiophene (BDT) counterpart (PBDT-T1). These results provide important progress for BDF-based copolymers and demonstrate that BDF-based copolymers can be competitive with the well-studied BDT counterparts via molecular structure design and device optimization.