Dimensionality Dependent Plasticity in Halide Perovskite Artificial Synapses for Neuromorphic Computing. (28th March 2019)

• Record Type: Journal Article
• 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
• Is Part Of: Advanced Electronic Materials. Volume 5:Number 9(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-28
• Subjects: neuromorphic electronics -- neuromorphic memory -- perovskite synapses -- quasi‐2D perovskite -- synaptic devices; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201900008
• Languages: English
• ISSNs: 2199-160X

Abstract

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)2 MA n ‐1 Pb n Br3 n +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. Abstract : Artificial synapses are fabricated from low‐dimensional perovskites to demonstrate synaptic plasticity with femtojoule‐level energy consumption similar to biological synapses. The operational mechanism of artificial synapses with 2D and quasi‐2D perovskite is analyzed. This approach may facilitate use of perovskite artificial synapses in neuromorphic electronics.