Multi-Resonant Absorption: A New Paradigm for Light-Trapping in Ultra-Thin Solar Cells

29th European Photovoltaic Solar Energy Conference and Exhibition; 58-59
We propose a novel approach for light trapping in ultra-thin solar cells. It is based on absorption through multiple resonant modes in the critical coupling regime (A=100%). The model is briefly described. Numerical results are presented for c-Si and GaAs absorbers. The results (absorption efficiency, short-circuit current as a function of the absorber thickness) exceed the previous theoretical limits for light trapping in solar cells.