Vision System Utilizing Large-Area Organic Single Crystals for Sensory Applications

• • The C8-BTBT single-crystal array achieves a coefficient of variation of 8% in synaptic weight modulation, a uniformity metric critical for reliable large-scale neuromorphic integration where polycrystalline films typically exhibit >20% variation due to grain boundaries. • • Operating at 1 V bias, the device maintains robust synaptic functionality, including learning and memory operations, enabling ultra-low-power consumption essential for edge vision systems and implantable bioelectronics. • • At 9.6 μW cm⁻² illumination, the optoelectronic synapse demonstrates pronounced photoresponsivity, facilitating pattern recognition with six grayscale intensities; focused-attention mode (V_GS = 1.5 V) suppresses background interference and resolves speckle patterns, while dispersed-attention mode (V_GS = 0.5 V) yields short-term plasticity. • • Polarity-dependent carrier trapping under positive/negative gate biases enables dynamic reconfiguration of photoresponse thresholds, emulating biological attention mechanisms and achieving long-term potentiation for adaptive, context-aware visual processing.