Estimating the Contribution of Excitons to Solar Cell Photocurrent by Photomagnetic Measurement Data

摘要

The results of investigations of the magnetic field effect on the photocurrent I_(ph) in Si and GaAs solar cells are presented. It is shown that the I_(ph) variation in magnetic field can be attributed to the decrease of the exciton diffusion length L_(exc). A simplified model photomagnetic experiment to estimate L_(exc) and the exciton contribution to solar cell photocurrent has been proposed.