Non-uniformities in thin-film cadmium telluride solar cells using electroluminescence and photoluminescence

It is the purpose of this research to develop specific imaging techniques that have the potential to be fast, inline tools for quality control in thin-film CdTe solar cells. Electroluminescence (EL) and photoluminescence (PL) are two techniques that are currently under investigation on CdTe small area devices made at Colorado State University. It is our hope to significantly advance the understanding of EL and PL measurements as applied to CdTe. Qualitative analysis of defects and non-uniformities is underway on CdTe using EL, PL, and other imaging techniques.