Photo-induced pyroelectric spikes for neuromorphic sensors

•Demonstrated photo-induced spike generator of transparent ITO/V2O5/ZnO/ITO device.•Tunability of the spike generation by light intensity and external electric field is presented.•The time scale of the spikes matches well to the neuron action potential.•A route for the self-biased transparent device...

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Bibliographic Details
Published in:Materials letters 2018-08, Vol.225, p.46-49
Main Authors: Kumar, Mohit, Ban, Dong-Kyun, Kim, Joondong
Format: Article
Language:English
Subjects:
Electricity generation
Energy
Generators
High-efficient performances
Materials science
Neuromorphic sensors
Photo-induced spike
Photonics
Power consumption
Self-biased
Sensors
Spikes
Transparent generator
Ultraviolet radiation
Vanadium pentoxide
Zinc oxide
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Summary:•Demonstrated photo-induced spike generator of transparent ITO/V2O5/ZnO/ITO device.•Tunability of the spike generation by light intensity and external electric field is presented.•The time scale of the spikes matches well to the neuron action potential.•A route for the self-biased transparent device for neuromorphic computing. The present report shows the photo-induced spike generation from the transparent ITO/V2O5/ZnO/ITO device. Particularly, pyroelectric ZnO and hole selective V2O5 are utilized to construct the all oxide-based self-biased and transparent ultra-violet spike generator. It is demonstrated that the magnitude of the spikes depends on the incoming photon intensity. The spike generation from all-oxide-based transparent device will be useful to design advanced see-through neuromorphic devices beyond the energy generation entities. In addition, external electric potential-dependent tunability of the spike generation is presented for high-efficient performances. This self-biased, transparent photodetector could be a replacement of the silicon neurons and resolve the issue of power consumption.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.04.106