University of Minnesota researchers, led by Professor Russell Holmes and former CEMS Professor Eray Aydil (NYU), have succeeded in demonstrating stable heterojunctions between metal-halide perovskites and offered the first in-depth examination of interfacial mixing in these structures.
Image from ACS Energy Letters
The team explained that perovskite devices currently rely on architectures that combine the perovskite active layer with adjacent organic or oxide layers. Alternative structures based on perovskite-perovskite heterojunctions have not been widely explored due mainly to ion diffusion and mixing across the interface. In this new work, the researchers demonstrated that this challenge is not a general limitation and that perovskite-perovskite interfaces can be stable.