Development and application of electroluminescence imaging for CdS/CdTe characterization

摘要

A technique for spatially resolved optical characterization of CdS/CdTe thin film solar cells has been developed using electroluminescence (EL).In EL,excess minority carriers are injected via forward biasing.Light produced in radiative carrier recombination is collected with a CCD camera.Because EL intensity depends upon radiative vs.non-radiative recombination lifetimes,EL provides insight into material quality.