NO GRAIN BOUNDARY CRYSTAL Cu2S THIN FILMS FOR SOLAR ENERGY CONVERSION

摘要

The present invention comprises thin film Cu₂S with ultra-large grains or in the best case no grain boundaries (a single crystal thin film). Based on our recent successes in atomic layer epitaxy of other materials we sought and found a suitable substrate (namely GaAs) that induces what appear to be Cu₂S single crystal thin films.