Date of Graduation
12-2024
Document Type
Thesis
Degree Name
Master of Science in Physics (MS)
Degree Level
Graduate
Department
Physics
Advisor/Mentor
Thibado, Paul M.
Committee Member
Kumar, Pradeep
Second Committee Member
Dix, Jeff
Keywords
Energy Harvesting; Graphene; Solar Cells
Abstract
This study presents the design and fabrication of graphene-based Schottky junction solar cells integrated into a 3-volt power system for low-power applications. Utilizing standard semiconductor processing methods, including selective oxide removal, metal contact deposition, and large-area graphene transfer, we fabricated solar cells from a silicon wafer coated with a thermal oxide layer. Each individual solar cell generated up to 270 µA of short-circuit current and an open-circuit voltage of 420 mV under illumination. We connected multiple solar cells in series to produce a total output of 3.3 volts, which is sufficient to recharge a 3-volt battery. The system, comprising these series-connected cells and a rechargeable battery, demonstrated the capability to provide continuous power to low-power devices, recharging intermittently through ambient light exposure. This approach highlights the potential of graphene-based solar cells in energy harvesting applications for ultra-low-power devices, such as sensors and wearable technology. Future work will focus on optimizing cell efficiency, exploring alternative energy harvesting methods, and scaling up production for commercial viability.
Citation
Amin, T. (2024). Design and Fabrication of Graphene Solar Cells for Low-Power Energy Harvesting Systems. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/5581
