Dibenzoindigo: A Nature-Inspired Biocompatible Semiconductor Material for Sustainable Organic Electronics

Synthesis and systematic investigation of dibenzoindigo, a derivative of the natural colorant indigo with an extended π‐electron conjugated system, is presented. This material shows comparable hole mobilities in organic field‐effect transistors (OFETs) with the benchmark semiconductors such as pentacene and dinaphthothienothiophene. Relatively easy synthesis of dibenzoindigo, low toxicity, and excellent ambient stability in OFETs makes it promising material for designing sustainable and biocompatible organic electronics. Air‐stable operation of optical memory elements has been demonstrated using dibenzonindigo as semiconductor and spirooxazine‐type photochromic material as a light sensitive component.