A neuromorphic bionic eye with broadband vision and biocompatibility using TIPS-pentacene-based phototransistor array retina

Haizhong Zhang*, Xin Ju, Dongzhi Chi, Linrun Feng, Zhe Liu, Kwangsing Yew, Minmin Zhu, Tiaoyang Li, Rongshan Wei, Shaohao Wang, Linfeng Sun, Zhongrui Wang, Yanqing Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Taking inspiration from the human eye's information processing capabilities, the artificial optoelectronic neuronic device (AOEND) offers a promising approach to creating a bionic eye that performs real-time, low-power processing by integrating optical sensors, signal processing, and electronic neurons into a single device. Despite significant advancements, the current AOEND still faces challenges in terms of power consumption, flexibility, bio-compatibility, and, most importantly, achieving photo-sensitivity across the same broadband perceivable wavelength range (380nm to 740nm) as the human eye. In this study, we present a commercially ready, dual-gated thin-film-transistor (TFT)-based AOEND. Our device exhibits exceptional photo-response to specific wavelengths by utilizing an organic TIPS-pentacene material as the channel layer and intentionally tailoring its optical bandgap to approximately 1.6eV. Additionally, the device successfully replicates various photon-triggered synaptic characteristics and performs visual sensing, memory processing, and other functions with low power consumption. Our findings present a viable strategy for the development of future integrated sensing-memory-processing flexible devices for optoelectronic artificial retina perception applications.

Original languageEnglish
Article number101885
JournalApplied Materials Today
Volume33
DOIs
Publication statusPublished - Aug 2023

Keywords

  • All-organic phototransistor
  • Bionic eyes
  • Broadband vision
  • Optoelectronic neuronic device
  • Tips-pentacene

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Zhang, H., Ju, X., Chi, D., Feng, L., Liu, Z., Yew, K., Zhu, M., Li, T., Wei, R., Wang, S., Sun, L., Wang, Z., & Wu, Y. (2023). A neuromorphic bionic eye with broadband vision and biocompatibility using TIPS-pentacene-based phototransistor array retina. Applied Materials Today, 33, Article 101885. https://doi.org/10.1016/j.apmt.2023.101885