Recent research advancements reveal novel materials for flexible and sustainable electronic devices. Electropolymerized poly(3,4-ethylenedioxythiophene) (PEDOT) has been utilized to create durable, stretchable electrochemical transistors suitable for wearable technology. Concurrently, a fully biodegradable conductive fiber employing tungsten-PBAT composites has been developed for mass production, bridging performance with environmental responsibility. These breakthroughs promise wide-ranging applications in next-generation flexible electronics with sustainability considerations at the forefront.