Figure 5

Ultrafast dynamics in the trilayers of P3HT, PVA and PCBM.

(a) Illustration of the possible morphology of the bilayer with a 5 nm interlayer of PVA.(b) TrAMP kinetics at 580 nm (GSB) and 750 nm (PA) in the bilayer with a thin (<5 nm) interlayer of PVA and d) with a thick (≫10 nm) layer. (c) The energy level scheme²⁴ of P3HT/PCBM with the hole transfer pathway from PCBM to P3HT, which is blocked with the introduction of PVA.