Cation engineering has been used to tune the efficiency and stability of perovskite solar cells. Here, Jodlowski et al. introduce guanidinium, a cation slightly larger than previously thought possible, mixed with the traditional methylammonium cation, into the 3D structure, improving device stability.
- Alexander D. Jodlowski
- Cristina Roldán-Carmona
- Mohammad Khaja Nazeeruddin
