The effect of oxygen on the properties of AlGaAs solar cells grown by molecular‐beam epitaxy

The effect of oxygen, which is unintentionally incorporated into AlGaAs films during epitaxial growth, on AlGaAs solar cell characteristics is investigated using molecular‐beam epitaxy. It is found that oxygen concentration strongly influences minority‐carrier diffusion length and that solar cell efficiency greatly decreases as oxygen concentration increases. A model to describe the effect of oxygen on solar cell characteristics is suggested.