Citation: Hoffman, Justin M.; Che, Xiaoyang; Sidhik, Siraj; Li, Xiaotong; Hadar, Ido; Blancon, Jean-Christophe; Yamaguchi, Hisato; Kepenekian, Mika\"el; Katan, Claudine; Even, Jacky; Stoumpos, Constantinos C.; Mohite, Aditya D.; Kanatzidis, Mercouri G. (2019). From 2D to 1D Electronic Dimensionality in Halide Perovskites with Stepped and Flat Layers Using Propylammonium as a Spacer.. Journal of the American Chemical Society, 141, pp. 10661-10676.