Selenium-alloyed cadmium telluride solar cells can achieve 22.1% solar cell efficiency, but why? asked a team from Loughborough and Colorado State Universities – particularly when cadmium telluride on its own can only hit 19.5%. The addition of selenium reduces the bandgap, but this is only part of the story, it appears. Cathodoluminescence – turning the ...

This story continues at Why selenium makes CdTe thin film solar cells better

Or just read more coverage at Electronics Weekly