Abstract
This paper describes the effect of using the low-concentration to the multi-junction solar cell module fabricated by the smart stacking technology. In this module, a high-efficiency cell (e.g. III-V MJ cell) is mechanically stacked on a larger-sized low-cost cell (e.g. Si or CIGS cell); the current matching between the stacked cells is managed by the area ratio of the cells and the irradiance distribution controlled by the concentrator. Simulation and experimental result shows that the control of irradiance distribution assists the current matching of the cells and reduces the top cell size without decreasing the module efficiency, resulting in higher efficiency and lower cost.
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