뉴로모픽 생체 의료 기기를 위한 하이브리드 전기-광학 2D FeFET

초록

Recent advances in artificial intelligence have accelerated the demand for low-power and high-reliability hardware in biomedical devices. In this study, we fabricated a MoS₂/P(VDF-TrFE)/Graphene-based two-dimensional ferroelectric fieldeffect transistor (2D-FeFET) and validated its potential as a neuromorphic device responsive to both electrical and optical stimuli. The fabricated device exhibited pronounced hysteresis, endurance over 10³ cycles, and stable data retention exceeding 10³ seconds. Furthermore, long-term potentiation/depression (LTP/D) was successfully implemented, confirming controllable synaptic weight modulation under electrical excitation. In addition, the device demonstrated wavelength-dependent photoresponse under various optical stimulus. These results confirm that the proposed 2D-FeFET can simultaneously achieve lowpower operation and long-term data stability, while its fine conductance tunability under optical excitation enables precise weight update. Consequently, the device presents significant potential as a next-generation neuromorphic platform suitable for wearable and implantable biomedical applications requiring high accuracy and reliability.