“…It should be mentioned that [1] also introduces the Scharfetter-Gummel method for solving the coupled diffusion and advection equation, which is not touched upon here. It should be noted however that the efficiency claims regarding this method have already been shown to be overstated [3]. [1] presumes that advective vapour transport is possible in the experimental configuration of [2], given that they impose a constant air velocity (of 0.005 m/s) through the sample.…”