Thin-film solar cells: How defects appear and disappear in CIGSe cells

An international collaboration of German, Israeli, and British teams has investigated the deposition of thin chalcopyrite layers. They were able to observe specific defects as these formed during deposition and under what conditions they self-healed using the BESSY II X-ray source at the Helmholtz Zentrum Berlin. The results of their research provide clues to optimizing fabrication processes and have now been published in Energy & Environmental Science.