Abstract
Emulating essential synaptic working principles using a single electronic device has been an important research field in recent years. However, achieving sensitivity and energy consumption comparable to biological synapses in these electronic devices is still a difficult challenge. Here, we report the fabrication of conjugated polyelectrolyte (CPE)-based artificial synapse, which emulates important synaptic functions such as paired-pulse facilitation (PPF), spike-timing dependent plasticity (STDP) and spiking rate dependent plasticity (SRDP). The device exhibits superior sensitivity to external stimuli andlow-energy consumption. Ultrahigh sensitivity and low-energy consumption are key requirements for building up brain-inspired artificial systems and efficient electronic-biological interface. The excellent synaptic performance originated from (i) a hybrid working mechanism that ensured the realization of both short-term and long-term plasticity in the same device, and (ii) the mobile-ion rich CPE thin film that mediate migration of abundant ions analogous to a synaptic cleft. Development of this type of artificial synapse is both scientifically and technologically important for construction of ultrasensitive highly-energy efficient and soft neuromorphic electronics.
Original language | English (US) |
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Pages (from-to) | 575-581 |
Number of pages | 7 |
Journal | Nano Energy |
Volume | 48 |
DOIs | |
State | Published - Jun 2018 |
Funding
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science, ICT & Future Planning) (NRF- 2016R1A3B1908431 ). This work was also supported by the Center for Advanced Soft-Electronics funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project ( 2013M3A6A5073175 ), and Creative-Pioneering Researchers Program through Seoul National University (SNU). J.L. acknowledges support by the National Science Foundation Graduate Research Fellowship Program by the United States government under Grant No. ( DGE‐114747 ).
Keywords
- Dipole reorientation
- Ion migration
- Memory
- Neuromorphic devices
- Sensitivity
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science
- Electrical and Electronic Engineering