From 2007 until 2015 a German consortium of academic and industrial partners, developed an extremely light and flexible Cu(In,Ga)Se 2 (CIGSe) thin film solar cell technology for space applications. We build on this experience to develop CIGS/pero tandem cells and modules on flexible substrates. For this terrestrial application we are considering steel foil or ultra-thin bendable glass as flexible substrates and aim at monolithicallly interconnected modules.
