Dual-function biomimetic eyes based on thermally-stable organohydrogel electrolyte

Biomimetic devices as a game changer offer unprecedented possibilities in modern optical system, artificial intelligence and other frontier fields. So far, the integrated devices with both quantitative environmental perception and self-regulation abilities are still the challenges for improving the intelligent level of optoelectronic technology. Herein, we present a dual-function biomimetic eye based on the photoelectrochemical device for the first time. The rational design of the interfaces and organohydrogel electrolyte has revolutionized the functional integration of optoelectronic device. Anions and cations in the organohydrogel electrolyte are involved in photoelectric conversion and electrodeposition process respectively in different working modes. Hence, the obtained biomimetic eye can not only detect the light intensity in self-powered mode but also adjust its own light transmission according to the illumination conditions, adapting to the environment just like human eyes. Moreover, the organohydrogel electrolyte shows excellent thermal stability (−40 °C ∼ 60 °C) and a relatively wide operating voltage range, which enables the biomimetic eye to operate in harsh environments. This work possesses potential application prospects in bionic devices and provides a new route for developing multifunctional and durable photoelectrochemical devices.