Citation: Mao, Lingling; Guo, Peijun; Kepenekian, Mika\"el; Spanopoulos, Ioannis; He, Yihui; Katan, Claudine; Even, Jacky; Schaller, Richard D.; Seshadri, Ram; Stoumpos, Constantinos C.; Kanatzidis, Mercouri G. (2020). Organic Cation Alloying on Intralayer A and Interlayer A' sites in 2D Hybrid Dion-Jacobson Lead Bromide Perovskites (A')(A)Pb2Br7.. Journal of the American Chemical Society, , pp. -.