Fig. 4. Lateral ion currents.

a Normalized hole density, ion density, and electric field inside a hypothetical p-type OECT (W = 1 mm, d = 200 nm, L = 100 μm, p₀ = 10²⁰ cm⁻³, μ_hole = 0.25 cm² (Vs)⁻¹, V_GS = 0.2 V, V_DS = −0.5 V). b Although the normalized hole current is constant across the channel, the ionic drift and diffusion current increases, which indicates that the current model leads to a non-steady-state solution.