Binary cations minimize energy loss in the wide-band-gap perovskite toward efficient all-perovskite tandem solar cells

Kaicheng Zhang, Chao Liu, Zijian Peng, Chaohui Li, Jingjing Tian, Canru Li, José García Cerrillo, Lirong Dong, Fabian Streller, Andreas Späth, Artem Musiienko, Jonas Englhard, Ning Li, Jiyun Zhang, Tian Du, Sanjayan Sathasivam, Thomas J. Macdonald, Albert These, Vincent M. Le Corre, Karen Forberich, Wei Meng, R. Fink, Andres Osvet, Larry Lüer, Julien Bachmann, Jinhui Tong, Christoph J. Brabec