Light: Science & Applications (Jul 2023)

Self-powered and broadband opto-sensor with bionic visual adaptation function based on multilayer γ-InSe flakes

  • Weizhen Liu,
  • Xuhui Yang,
  • Zhongqiang Wang,
  • Yuanzheng Li,
  • Jixiu Li,
  • Qiushi Feng,
  • Xiuhua Xie,
  • Wei Xin,
  • Haiyang Xu,
  • Yichun Liu

DOI
https://doi.org/10.1038/s41377-023-01223-1
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 11

Abstract

Read online

Abstract Visual adaptation that can autonomously adjust the response to light stimuli is a basic function of artificial visual systems for intelligent bionic robots. To improve efficiency and reduce complexity, artificial visual systems with integrated visual adaptation functions based on a single device should be developed to replace traditional approaches that require complex circuitry and algorithms. Here, we have developed a single two-terminal opto-sensor based on multilayer γ-InSe flakes, which successfully emulated the visual adaptation behaviors with a new working mechanism combining the photo-pyroelectric and photo-thermoelectric effect. The device can operate in self-powered mode and exhibit good human-eye-like adaptation behaviors, which include broadband light-sensing image adaptation (from ultraviolet to near-infrared), near-complete photosensitivity recovery (99.6%), and synergetic visual adaptation, encouraging the advancement of intelligent opto-sensors and machine vision systems.