POS5-1176
N-Type Organic Electrochemical Transistors Gated by High-Capacitance Solid-State Ionogels
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Rihyeon Kim (INHA university)
Co-Author(s)
Abstract
While n-type organic electrochemical transistors (OECTs) are essential for complementary logic circuits, their practical implementation has been restricted by the absence of stable n-type materials and the intrinsic limitations of aqueous electrolytes, such as volatility and narrow electrochemical stability windows. To address these challenges, we present highly stable n-type OECTs realized by combining an organic semiconductor with strong electron affinity and non-volatile solid-state ionogel electrolytes. The device operates through the field-induced injection of anions, which strip away the pre-existing positive counterions and localize free electrons on the polymer backbone, resulting in rapid and highly reversible changes in channel conductivity. This ionogel-gated OECT ensures highly efficient ion-to-electron coupling, enabling a high transconductance of 19.9 mS and an ON/OFF current ratio of ~10⁴. We further examine how replacing aqueous electrolytes with solid-state ionogels enhances the stability of the devices. By systematically varying the ionogel composition, we successfully identify the optimal conditions for maximizing both electrical performance and device reliability.
