Photovoltaics: Looking at the instabilities that affect hybrid perovskites
Categorie(s) : News, Research
Published : 6 July 2020
Hybrid perovskite photovoltaic cells can deliver yields of more than 20%. However, they do not age well. Researchers from Irig and INES joined forces to investigate the mechanisms that underpin the formation of the best-known hybrid perovskite, MAPbI3*, which is synthesized in thin layers.
The research revealed two things that explain the behavior of cells made from these thin-layer materials: First, the intrinsic instability of MAPbI3, which breaks down under mechanical strain (here, it is linked to the spontaneous appearance of MAPbCl3, a chlorinated perovskite phase); and, second, the substantial variability in the material’s lattice structure.
New and more complex materials derived from MAPbI3 but with the promise of greater stability will benefit from this novel approach.
*methylammonium lead iodide