Fig. 5: EQCM-D behavior of PEDOT:ClO4 and PEDOT:PSS films electrodeposited over 30 s on EQCM quartz crystals.
From: Robust and flexible organic electrochemical transistors enabled by electropolymerized PEDOT

Voltage sweep, current response, frequency response (Δf/n) at the 3rd overtone, and converted mass variation (Δm) under cyclic linear potential sweep for a PEDOT:ClO4 and b PEDOT:PSS. The potential was applied between −0.8 V to 0.8 V at a scan rate of 50 mV/s. c Cyclic voltammetry, d mass variation vs. voltage for PEDOT:ClO4. e Cyclic voltammetry, f mass variation vs. voltage for PEDOT:PSS. Illustration of the ionic distribution without voltage application and during redoping/dedoping g for PEDOT:ClO4 and h for PEDOT:PSS. The bottom yellow part indicates the Au QCM sensor. For (a and b), the data from the 5th and 6th cycles are shown, and for (c–f), the 5th cycle is plotted.