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Creators/Authors contains: "E. Carlson, M. Stevens"

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  1. (, 60th IEEE International Midwest Symposium on Circuits and Systems)
    We present a drift-diffusion and Poisson solver using a finite-element method to study carrier dynamics under ultra-high solar concentration. By modeling the carrier densities and the electric potential in quasi steady-state and dynamic conditions, we can use the splitting of the quasi-Fermi levels to model electrical properties such as open-circuit voltage. In this work, we analyze the validity of previously used approximations on open-circuit voltage and the effects of increasing optical carrier densities on small band gap solar cells. Graded mesh refinement is implemented to improve runtime. Ultimately, we show a change in the carrier profiles that may lead to detrimental charge carrier extraction. 
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