Improved photovoltaic performance of P3HT:PCBM cells by addition of a low band-gap oligomer†
Abstract
The introduction of a low band-gap oligomer, oligo(benzo[1,2,5]thiadiazole-alt-3,3′′′-dihexylquaterthiophene) (BT4T) improved the performance of P3HT:PCBM bulk heterojunction organic photovoltaic cells due to improved UV-vis absorption and increased P3HT crystallinity.