Artificial Vision Adaption Mimicked by an Optoelectrical In(2)O(3)Transistor Array

Simulation of biological visual perception has gainedconsiderable attention. In this paper, an optoelectrical In2O3transistor array with a negative photoconductivity behavior isdesigned using a side-gate structure and a screen-printed ion-gel asthe gate insulator. This paper is thefirst to observe a negativephotoconductivity in electrolyte-gated oxide devices. Furthermore, anartificial visual perception system capable of self-adapting toenvironmental lightness is mimicked using the proposed devicearray. The transistor device array shows a self-adaptive behavior oflight under different levels of light intensity, successfully demonstrat-ing the visual adaption with an adjustable threshold range to the external environment. This study provides a new way to create anenvironmentally adaptive artificial visual perception system and has far-reaching significance for the future of neuromorphicelectronics.