POS5-1439
A Monolithically Integrated Fibriform Organic Electrochemical Schmitt Trigger for Noise-Immune Smart Textiles
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Jongsu Lee (Korea Institute of Science and Technology)
Co-Author(s)
Abstract
Wearable e-textiles have emerged as a promising platform for continuous healthcare monitoring by enabling highly sensitive detection of physiological and environmental stimuli. However, such high sensitivity also renders textile sensors highly susceptible to motion artifacts and friction-induced electrical noise, leading to unstable analog outputs and false triggering. Schmitt triggers effectively suppress electrical noise through hysteretic switching, eliminating false triggering and enabling reliable signal acquisition. However, conventional CMOS Schmitt triggers require six transistors (three P-MOS and three N-MOS), making their monolithic integration into fiber platforms challenging. Here, we report a monolithically integrated fibriform Schmitt trigger composed of a complementary 1P–1N organic electrochemical transistor (OECT) pair. The device was fabricated by integrating P-type and N-type polymer semiconductor-coated Au microfibers, an ion-gel electrolyte, and a shared gate electrode into a coaxial fiber architecture. The complementary OECT pair exhibited a well-defined hysteresis window with switching voltages below 2 V, arising from ion-mediated electrochemical doping and de-doping of the respective organic semiconductor channels. The resulting hysteretic response enabled reliable suppression of electrical noise and noise-induced false triggering, converting unstable analog sensor signals into stable digital outputs. This work demonstrates that complementary 1P–1N OECTs provide a compact, low-voltage, and mechanically compliant platform for fiber-integrated, noise-immune signal conditioning in next-generation smart textiles.
