(A) Maximum current density Jmax as a function of light intensity: (•), Jmax-on; (▪), Jmax-off. (B) Reciprocal decay time constant τ of the photocurrent as a function of light intensity: (•), τon, (▪), τoff. The solid lines are the results of fitting the parameters of Eqs. 2a (Jmax-on), 2c (τon), and 5a (Jmax-off) (see Supplementary Material) to the data with the following parameters: Cm = 1 μF/cm2 (fixed); Cp = 2 μF/cm2 (fixed); Gm = 10 nS/cm2 (fixed); Gp = 1 μS/cm2 (fixed); ; L1/2 = (0.5 ± 0.1); and V* = (0.010 ± 0.001) V. τoff is independent of the light intensity.