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- Title
Dimensionality Dependent Plasticity in Halide Perovskite Artificial Synapses for Neuromorphic Computing.
- Authors
Kim, Sung‐Il; Lee, Yeongjun; Park, Min‐Ho; Go, Gyeong‐Tak; Kim, Young‐Hoon; Xu, Wentao; Lee, Hyeon‐Dong; Kim, Hobeom; Seo, Dae‐Gyo; Lee, Wanhee; Lee, Tae‐Woo
- Abstract
The hysteretic behavior of organic–inorganic halide perovskites (OHPs) are exploited for application in neuromorphic electronics. Artificial synapses with 2D and quasi‐2D perovskite are demonstrated that have a bulky organic cation (phenethylammonium (PEA)) to form structures of (PEA)2MAn‐1PbnBr3n+1. The OHP films have morphological properties that depend on their structure dimensionality (i.e., n value), and artificial synapses fabricated from them show synaptic responses such as short‐term plasticity, paired‐pulse facilitation, and long‐term plasticity. The operation mechanism of OHP artificial synapses are also analyzed depending on the dimensionality and it is found that quasi‐2D (n = 3–5) OHP artificial synapses show much longer retention than 2D and 3D OHP counterparts. The calculated energy consumption of a 2D OHP artificial synapse (≈0.7 fJ per synaptic event) is comparable to that of biological synapses (1–10 fJ per synaptic event). These OHP artificial synapses may enable development of neuromorphic electronics that use very little energy.
- Subjects
SYNAPSES; HALIDES; ENERGY consumption; PEAS
- Publication
Advanced Electronic Materials, 2019, Vol 5, Issue 9, pN.PAG
- ISSN
2199-160X
- Publication type
Article
- DOI
10.1002/aelm.201900008