Highly Stretchable Synaptic Transistors Based On Phase-Separated P3HT–SEBS Networks for Adaptative Neuromorphic Computation

Recent advancements in organic electronics highlight the potential of stretchable organic field-effect transistors for neuromorphic applications. However, maintaining a high electrical performance under mechanical strain remains a critical challenge. Here, we present a stretchable organic synaptic transistor with a phase-separating method. By blending poly(3-hexylthiophene) (P3HT) with styrene–ethylene–butylene–styrene (SEBS), P3HT–SEBS phase-separated films were obtained that combine high mechanical stretchability with good charge transport property. The organic synaptic transistors (OSTs) were able to withstand a mechanical strain of greater than 80%. Remarkably, by combining SEBS-induced stress dissipation with ionic gel-driven synaptic modulation, the OSTs were able to mimic synaptic dynamics under strain, facilitating neurobiological behaviors. Our work addresses the critical need for strain-resilient organic devices in next-generation human–machine collaboration.