研究目的
Investigating the performance of a micro-concentrator photovoltaic module incorporating a bifacial silicon solar cell for direct and diffuse light capture.
研究成果
The integration of a bifacial silicon solar cell with a micro-CPV module significantly enhances performance by capturing diffuse light, achieving a combined efficiency of 25.4%. Future improvements include optimizing the lens array pattern and using higher efficiency CPV cells.
研究不足
The prototype array's small size and the use of a square CPV aperture with a hexagonal lens array resulted in unused areas, affecting efficiency. The study was limited to specific environmental conditions in Washington, DC.
1：Experimental Design and Method Selection:
The study involved the assembly of a micro-CPV module using micro-transfer printing and the integration of a bifacial silicon solar cell for diffuse light capture.
2：Sample Selection and Data Sources:
InGaP/GaAs tandem cells were grown on GaAs substrates and fabricated into solar cells. Outdoor measurements were conducted in Washington, DC.
3：List of Experimental Equipment and Materials:
GaAs-based 2J CPV cells, all-glass lens arrays, bifacial mono-crystalline silicon solar cell, micro-transfer printer, Eppley pyranometer and pyroheliometer.
4：Experimental Procedures and Operational Workflow:
The cells were printed into a regular hexagonal array on glass substrates, and the lens arrays were positioned over the cell arrays. Outdoor testing was performed on a two-axis tracker.
5：Data Analysis Methods:
The performance of the hybrid module was analyzed based on efficiency measurements with respect to global normal irradiance (GNI) and direct normal irradiance (DNI).
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