Citation: Sourisseau, Sebastien; Louvain, Nicolas; Bi, Wenhua; Mercier, Nicolas; Rondeau, David; Boucher, Florent; Buzar\'e, Jean-Yves; Legein, Christophe (2007). Reduced Band Gap Hybrid Perovskites Resulting from Combined Hydrogen and Halogen Bonding at the Organic−Inorganic Interface. Chemistry of Materials, 19, pp. 600-.