A light-driven multi-state heterojunction transistor for optoelectronic ternary logic circuits (opens in new tab)

A multi-state transistor that converts optical inputs into discrete logic outputs provides a device-level framework for optoelectronic computing beyond the binary paradigm. Here, we present a light-driven ternary heterojunction transistor (T-HTR), featuring three distinct states – off, on, and a light-tunable intermediate state – within a single device. The multi-state switching is achieved by a p-type/n-type heterojunction with a controlled charge injection barrier at the source electrode. T...