Poly(vinyl alcohol)-gated junctionless Al-Zn-O phototransistor for photonic and electric hybrid neuromorphic computation
Abstract
The hardware implementation of biological synapses is very necessary for a new brain-like neuromorphic computation system. In recent years, optoelectronic synaptic devices have become the application platform for next generation neuromorphic system and artificial neural network. Here, a new kind of photoelectronic synaptic transistors are proposed using the Al-Zn-O (AZO) as coplanar gate and the laterally-coupled poly (vinyl alcohol) (PVA) electrolyte membrane as neurotransmitter. The key synaptic functions such as excitatory postsynaptic current (EPSC) and paired-pulse-facilitation (PPF) were successfully emulated. More importantly, by exposing an ultraviolet (UV) laser, the transformation of short-term memory (STM) to long-term memory (LTM) can be mimicked in our neuromorphic devices. Furthermore, an energy-band diagram is finally proposed for a better understanding of the underlying mechanism of LTM behavior. These results represent an important step toward the next-generation neural networks enabled by photo-electric hybrid nano-electronics, and point to the potential of more sophisticated neuromorphic computations.
- Publication:
-
Solid State Electronics
- Pub Date:
- March 2020
- DOI:
- 10.1016/j.sse.2020.107767
- Bibcode:
- 2020SSEle.16507767Z
- Keywords:
-
- Al-Zn-O transistor;
- Photo-electric hybrid;
- Biological synapse;
- Neuromorphic computing;
- Long-term memory