Details of the new method have now been published as an "Advance Online Publication" in the renowned journal Nature Materials ("Potassium-induced surface modification of Cu(In,Ga)Se2 thin films for high-efficiency solar cells").
|This shows high efficiency, flexible CIGS solar cells on polyimide film developed |
using a new process.
Until recently, the Empa CIGS cells were the most efficient in the world; at the end of October, though, a German research team at the Zentrum für Sonnenenergie- und Wasserstoff-Forschung (ZSW) in Stuttgart presented CIGS cells with an efficiency of 20.8%, although they use far higher processing temperatures and (rigid) glass as the substrate. The slightly improved record shows that CIGS thin film technologies are a "hot" topic – and that Empa is right at the cutting edge.