Spatial collection efficiency of a solar cell

Abstract

The spatial collection efficiency C(z) is the probability that a photon absorbed at the point z in the cell will yield a charge carrier into the current. The C function is obtained from the spectral response by means of the inverse Laplace transformation. It gives important information on the cell parameters such as diffusion length, junction depth, surface recombination velocity, etc. Examples of c-Si and thin-film CdS/CdTe cells are given.