CELLO: an advanced LBIC measurement for solar cell local characterization

摘要

With the help of an extremely stable potential/current source the linear response (current changes as well as potential changes) to an intensity modulated local additional illumination of a solar cell is measured in the CELLO system for various fixed global conditions. This allows to obtain a large number of independent data at each point of a solar cell. Fitting this data to an advanced model yields a set of local parameters for each point on the solar cell which allow to calculate local IV-curves. Theoretical and experimental techniques will be discussed and the applicability of this new tool will be demonstrated.