Abstract
To optimize the design of multi-junction photovoltaic devices, robust models of the tunnel junctions connecting sub-cells are essential. In this paper, we describe the effects of varying key parameters in a model of an AlGaAs tunnel junction. We noted two peaks in the current-voltage behavior of the AlGaAs tunnel junction under consideration. We found that the effective Richardson constant scaling factors in the model primarily affected the magnitude of the main peak. The p++ doping concentration impacted the height of both peaks, while the n++ doping concentration changed the magnitude of the main peak and shifted the secondary peak.
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