Vertical organic synapse expandable to 3D crossbar array

Yongsuk Choi, Seyong Oh, Chuan Qian, Jin Hong Park, Jeong Ho Cho

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)


Recently, three-terminal synaptic devices have attracted considerable attention owing to their nondestructive weight-update behavior, which is attributed to the completely separated terminals for reading and writing. However, the structural limitations of these devices, such as a low array density and complex line design, are predicted to result in low processing speeds and high energy consumption of the entire system. Here, we propose a vertical three-terminal synapse featuring a remote weight update via ion gel, which is also extendable to a crossbar array structure. This synaptic device exhibits excellent synaptic characteristics, which are achieved via precise control of ion penetration onto the vertical channel through the weight-control terminal. Especially, the applicability of the developed vertical organic synapse array to neuromorphic computing is demonstrated using a simple crossbar synapse array. The proposed synaptic device technology is expected to be an important steppingstone to the development of high-performance and high-density neural networks.

Original languageEnglish
Article number4595
JournalNature communications
Issue number1
Publication statusPublished - 2020 Dec 1

Bibliographical note

Funding Information:
We acknowledge the grants from Basic Science Research Program and Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2020R1A2C2007819, 2016M3A7B4910426, and 2020R1A4A2002806) and the Creative Materials Discovery Program (NRF-2019M3D1A1078299) through the NRF of Korea funded by the Ministry of Science and ICT, Korea.

Publisher Copyright:
© 2020, The Author(s).

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)


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