Enhancing the short-circuit current and power conversion efficiency of polymer solar cells with graphene quantum dots derived from double-walled carbon nanotubes

摘要

Graphene quantum dots (GQDs) derived from double-walled carbon nanotubes with strong emission were prepared through solution chemistry. The introduction of GQDs in a bulk heterojunction polymer solar cell based on Poly (3-hexylthiophene):(6,6)-phenyl-C61 butyric acid methyl ester (P3HT:PCBM) resulted in the significant enhancement of power conversion efficiency (PCE). The efficiency can be further improved by adjusting the PCBM content in the active layer, with the highest PCE of 5.24%.