Citation: Ke, Weijun; Spanopoulos, Ioannis; Tu, Qing; Hadar, Ido; Li, Xiaotong; Shekhawat, Gajendra S.; Dravid, Vinayak P.; Kanatzidis, Mercouri G. (2019). Ethylenediammonium-Based "Hollow" Pb/Sn Perovskites with Ideal Band Gap Yield Solar Cells with Higher Efficiency and Stability.. Journal of the American Chemical Society, 141, pp. 8627-8637.