The effect of base thickness on photoconversion efficiency in textured silicon-based solar cells

A theory is developed, which describes the experimental external quantum efficiency, EQE ($\lambda$) as a function of photon wavelength for structured Si-based solar cells. Short-circuit current density as a function of base thickness, $d$, is calculated for the high-efficiency solar cells with the photoconversion efficiency $\eta\ge$ 25% The procedure allows one to carry out a complete optimization of such solar cells, in particular, to find the optimal base thickness, $d_{opt}$.