Citation: Stoumpos, Constantinos C.; Cao, Duyen H.; Clark, Daniel J.; Young, Joshua; Rondinelli, James M.; Jang, Joon I.; Hupp, Joseph T.; Kanatzidis, Mercouri G. (2016). Ruddlesden--Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors. Chemistry of Materials, 28, pp. 2852-.