Citation: Connor, Bridget; Smaha, Rebecca; Li, Jiayi; Gold-Parker, Aryeh; Heyer, Alexander; Toney, Michael F.; Lee, Young; Karunadasa, Hemamala I. (2021). Alloying a Single and a Double Perovskite: A Cu+/2+ Mixed-Valence Layered Halide Perovskite with Strong Optical Absorption. Chemical Science, , pp. -.