Organic photosensors tune signal amplitude with ionic control.

Researchers have created an event-driven organic photosensor that mimics biological vision by controlling signal amplitude within a single layer. The new sensor couples ionic and electronic transport in an organic mixed ionic-electronic conductor, enabling voltage-tunable control over the size of signal spikes. This functionality is typically achieved with complex multi-transistor setups. This design preserves motion-relevant contrast and reduces data load, establishing ionic-electronic coupling as a strategy for adaptive, low-power neuromorphic vision hardware. Organic photosensors use ionic-mediated inhibition to achieve amplitude-controllable event-driven responses, a departure from conventional semiconductor designs that require complex multi-transistor architectures. The researchers specifically designed the sensors…