An Optically Modulated Organic Schottky-Barrier Planar-Diode-Based Artificial Synapse

摘要

Phototunable synaptic elements are beginning to emerge for the sustainable development of advanced neuromorphic computing technology in the post-Moore era. However, the phototunable organic synaptic devices still hardly exhibit superior overall performances. Here, an optically modulated organic planar-diode-based artificial synapse is demonstrated in which the Schottky barrier can be sensitively modulated by external UV light because of the intrinsic ultrathin nature of the bilayer organic crystalline semiconductor. The device exhibits excellent optoelectronic synaptic behaviors, especially outstanding photosensitivity, pJ-level energy consumption, an extremely long state retention time, and a tunable synaptic plasticity transition. Thus, this work can shed new light on developing optoelectronic synaptic devices with superior device performance via interface modulation and device design.