FIGURE 2.

(Solid line) Combinations of the charge-separation time 1/γ and the average single-site lifetime τ_ss that result in a longest lifetime of 18 ps in PSI modeled with a homogeneous antenna. The upper axis shows the values of the index of refraction, n, that correspond to the values of τ_ss on the lower axis (only for homogeneous antenna). The gray area encloses the interval in which similar relationships between 1/γ and τ_ss occurred for 16 random representations of a heterogeneous antenna (see text for details).