COMPOSITION AND METHOD

摘要

This invention relates to a process for preparing a vitreous semiconductor comprising bismuth and selenium. The semiconductor has at least 0.5 atomic percent bismuth and a greater than a stoichiometric percentage of selenium. The invention also relates to a method for producing such a semiconductor by co-evaporating the bismuth and selenium and simultaneously quenching the metal and non-metal vapors onto a substrate held at a temperature below the condensation point of either component.