Figure 3
From: Direct-current generators based on conductive polymers for self-powered flexible devices

(a) The electronic densities distributions of HOMO of PPy (top panel), PEDOT (middle panel) and PANI (bottom panel) in normal state (left panel), compressing state (middle panel) and stretching state (right panel). (b) HOMO vs. deformations (2%, 4%, 6%, 8%,10%) for conductive polymer PPy, PEDOT and PANI. (c) The relative change in HOMO of PPy, PEDOT and PANI under deformations.