Tuning structural isomers of phenylenediammonium to afford efficient and stable perovskite solar cells and modules

Salt passivation of perovskite often results in formation of 2D perovskite layers, which impaired charge transport behaviour. Here, the authors study the energy barrier of 2D perovskite formation upon passivation by different iodide salt, and provide insight how to manipulate this to maximise device performance.