摘要
This study investigates the use of three solid-state natural polymer electrolytes-chitosan, methylcellulose, and fish gelatin-in organic electrochemical transistors (OECTs), using PEDOT:PSS as the channel material. The electrical performance of these devices was systematically compared to a conventional aqueous NaCl-based OECT. Key transistor parameters, including threshold voltage (V th ), on/off current ratio (I on /I off ), and transconductance (g m ), were measured and analyzed. Among the tested materials, the chitosan-based OECT demonstrated the most balanced performance, with the lowest V th of −0.71 V, a high I on /I off ratio of 4.37 × 10 2 , and a strong g m of 4.75 × 10 -6 S. Notably, it exhibited comparable performance to the aqueous NaCl-based device, highlighting its potential as a sustainable and efficient electrolyte for future applications in flexible, wearable, and neuromorphic electronics.