1 research outputs found
Ultrathin Organic Solar Cells with Graphene Doped by Ferroelectric Polarization
Graphene has been employed as transparent
electrodes in organic solar cells (OSCs) because of its good physical
and optical properties. However, the electrical conductivity of graphene
films synthesized by chemical vapor deposition (CVD) is still inferior
to that of conventional indium tin oxide (ITO) electrodes of comparable
transparency, resulting in a lower performance of OSCs. Here, we report
an effective method to improve the performance and long-term stability
of graphene-based OSCs using electrostatically doped graphene films
via a ferroelectric polymer. The sheet resistance of electrostatically
doped few layer graphene films was reduced to ∼70 Ω/sq
at 87% optical transmittance. Such graphene-based OSCs exhibit an
efficiency of 2.07% with a superior stability when compared to chemically
doped graphene-based OSCs. Furthermore, OSCs constructed on ultrathin
ferroelectric film as a substrate of only a few micrometers show extremely
good mechanical flexibility and durability and can be rolled up into
a cylinder with 7 mm diameter