Figure 1: Tensile strain induced decrease in the resistivity independent on the thickness.
From: Growth Mechanism of Strain-Dependent Morphological Change in PEDOT:PSS Films

(a) The resistance change of PEDOT:PSS films with tensile strain according to the thickness of the films. (b) Relative change in the resistance (ΔR/R0) with the strain. Gray circle indicated theoretical increase in resistance by geometrical change. (c) Relative change in resistivity (Δρ/ρ0) as a function of tensile strain.