Bioinspired Multifunctional Organic Transistors Based on Natural Chlorophyll/Organic Semiconductors

Abstract

Abstract Inspired by the photosynthesis process of natural plants, multifunctional transistors based on natural biomaterial chlorophyll and organic semiconductors (OSCs) are reported. Functions as photodetectors (PDs) and light‐stimulated synaptic transistors (LSSTs) can be switched by gate voltage. As PDs, the devices exhibit ultrahigh photoresponsivity up to 2 × 10 6 A W −1 , detectivity of 6 × 10 15 Jones, and I photo / I dark ratio of 2.7 × 10 6 , which make them among the best reported organic PDs. As LSSTs, important synaptic functions similar to biological synapses are demonstrated, together with a dynamic learning and forgetting process and image‐processing function. Significantly, benefiting from the ultrahigh photosensitivity of chlorophyll, the lowest operating voltage and energy consumption of the LSSTs can be 10 −5 V and 0.25 fJ, respectively. The devices also exhibit high flexibility and long‐term air stability. This work provides a new guide for developing organic electronics based on natural biomaterials.