Visible Light-Modulated Low-Power Resistive Switching in Perovskite Nickelate Photovoltaic Heterostructures

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Growing demand for data storage necessitates advanced materials with low power consumption and fast resistive switching.
• Perovskite nickelates offer unique metal-insulator transitions ideal for resistive switching, but traditional methods face energy and hysteresis issues.

Purpose of the Study:

• To demonstrate visible light-modulated metal-insulator transitions in NdNiO3 photovoltaic heterostructures.
• To explore low-power, rapid, and tunable resistive switching for optoelectronic memory and neuromorphic computing.

Main Methods:

• Fabrication of NdNiO3 photovoltaic heterostructures.
• Modulation of metal-insulator transition using visible light illumination (20 mW·cm−2).
• Analysis of resistivity switching, photoinduced electron doping, and Ni 3d-orbital reconstruction.

Main Results:

• Achieved 2 orders of magnitude resistivity switching under low-intensity visible light.
• Demonstrated photoinduced electron doping leading to metallic behavior.
• Integrated multilevel resistive switching with high state reproducibility via light intensity and temperature control.

Conclusions:

• NdNiO3 photovoltaic heterostructures provide a novel platform for low-power optoelectronic memory.
• Visible light modulation offers an energy-efficient strategy for resistive switching.
• The developed system shows promise for future neuromorphic computing applications.