OECT(Organic electrochemical transistor), promising biochemical sensor platform, shows intrinsic ion-electron coupling and memory effect. However, slow switching speed, faradaic charge injection and material instability is still challenges, limiting its practical application.
Here, we present a functionalized silicone-organic framework(SOF) based active layer, which is composed of PEDOT:PSS semiconductor and trichlorosiliane with oxide group. Silanol is thermally crosslinked preventing the degradation of PEDOT:PSS; mealwhile, residual silanol converts to siloxide species that strongly trap penetrated cations under physiological conditions. Furthermore, ion acceleration and low-power ion injection to the active layer is achieved due to the ion-dipole interaction of oxide group.
SOF based OECT offered a low threshold voltage, fast switching speed, enhanced transconductance and memory effect, enabilng the real-time and ultralow voltage consumption of biochemical sensor.