Ultra Low Power Consumption Optoelectronic Logic Operation Based on Negative Photoresponse of CuO/BaTiO<sub>3</sub> Heterojunction Photodetector
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A self-powered UV photodetector that utilizes both ferroelectric and photovoltaic effects is presented. This approach enables the realization of ultra-low power, reconfigurable optoelectronic logic gates. Additionally, the approach is demonstrated on a CuO/BaTiO3 heterojunction photodetector. The behavior of the photodetector can be enhanced by the poling effect, which aligns the internal electric field of the BaTiO3 through the application of a strong external electric field. This can facilitate the implementation of optoelectronic logic gates. Our achievement represents a successful demonstration of ultra-low-power logic operations, utilizing voltages in the hundreds of micron scale, under a 310 nm wavelength and a light intensity of 0.52 mW·cm-2. This research presents a promising avenue for future research in optoelectronic logic gate design.