CH_3NH_3PbI_3 perovskite / silicon tandem solar cells: characterization based optical simulations Filipič, Miha ; Löper, Philipp ; Niesen, Bjoern ; De Wolf, Stefaan ; Krč, Janez ; Ballif, Christophe ; Topič, Marko Abstract Publication: Optics Express Pub Date: April 2015 DOI: 10.1364/OE.23.00A263 Bibcode: 2015OExpr..23A.263F