The Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) has set a new world record in thin-film photovoltaics. Scientists in Stuttgart achieved 21.7 percent efficiency with a solar cell made of copper indium gallium diselenide (CIGS). ZSW succeeded in bringing the record back to the institute with this cell's performance. Swedish researchers achieved a new best mark in June, which has now been surpassed by 0.7 percentage points. The progress underway in the southwest of Germany is helping to make solar power more affordable.