The effect of the PEDOT:PSS surface energy on the interface potential barrier

► Realization of 4 ITO/PEDOT:PSS/Al devices with 4 kinds of PEDOT:PSS. ► Measurements of the PEDOT:PSS surface energy. ► Device characterizations by the means of I − V and C − V measurements. ► Estimation of the carrier density and built-in potential. ► Discussion relating the built-in potential and the polar component of the PEDOT:PSS surface energy.