Flexible Cu(In,Ga)Se2 on Al foils and the effects of Al during chemical bath depositionBremaud, D.; Rudmann, D.; Kaelin, M.; Ernits, Kaia; Bilger, G.; Döbeli, M.; Zogg, H.; Tiwari, A.N.Thin solid films2007 / 15, p. 5857-5861 https://www.sciencedirect.com/science/article/pii/S0040609006016087