Graphene–silicon solar cells enable battery‑free operation in autonomous sensors
Developing autonomous sensor systems capable of sustained operation without battery dependence is essential for the Internet of Things. A recent study by researchers from the University of Arkansas and the University of Michigan demonstrates how graphene–silicon solar cells can serve as an efficient and stable power source for an ultra‑low‑energy temperature sensing platform.
Image from: Journal of Vacuum Science & Technology B
The team fabricated an array of graphene‑based photovoltaic cells, integrated them into standard packages, and characterized their current–voltage behavior under illumination. When connected in series, these cells provided the voltage necessary to charge three independent storage capacitors. Each capacitor reached operational voltage within minutes and subsequently powered the sensor system for more than 24 hours without recharging.
Source: https://www.graphene-info.com/graphene-silicon-solar-cells-enable-battery-free-operation-autonomous-sensors
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