Light-Adapted Optoelectronic-Memristive Device for the Artificial Visual System.

Li Su, Zijun Hu, Tingting Yan, Xinglong Zhang, Dawei Zhang, Xiaosheng Fang
Author Information
  1. Li Su: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology Shanghai 200093, P. R. China.
  2. Zijun Hu: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China.
  3. Tingting Yan: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China.
  4. Xinglong Zhang: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China.
  5. Dawei Zhang: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology Shanghai 200093, P. R. China. ORCID
  6. Xiaosheng Fang: Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China. ORCID

Abstract

With the development of artificial intelligence systems, it is necessary to develop optoelectronic devices with photoresponse and storage capacity to simulate human visual perception systems. The key to an artificial visual perception system is to integrate components with both sensing and storage capabilities of illumination information. Although module integration components have made useful progress, they still face challenges such as multispectral response and high energy consumption. Here, we developed a light-adapted optoelectronic-memristive device integrated by an organic photodetector and ferroelectric-based memristor to simulate human visual perception. ITO/P3HT:PC71BM/Au as the light sensor unit shows a high on/off ratio (/) reaching ���5 �� 10 at 0 V. The memristor unit, consisting of ITO/CBI@P(VDF-TrFE)/Cu, has a / ratio window of ���10 under 0.05 V read voltage and ultralow power consumption of ���1 pW. Moreover, the artificial visual perception unit shows stable light-adapted memory windows under different wavelengths of irradiation light (400, 500, and 600 nm; they meet the spectral range of human visual recognition) and can clearly identify the target image ("T" shape) because of the apparent contrast, which results from the high / ratio values. These results provide a potential design strategy for the development of intelligent artificial vision systems.

Keywords

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