Zr Incorporation into TiO2 Electrodes Reduces Hysteresis and Improves Performance in Hybrid Perovskite Solar Cells while Increasing Carrier Lifetimes. - Nagaoka H; Ma F; deQuilettes DW; Vorpahl SM; Glaz MS; Colbert AE; Ziffer ME; Ginger DS (The journal of physical chemistry letters, 2015)