Photo-induced pyroelectric spikes for neuromorphic sensors

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.