Organic gelators as growth control agents for stable and reproducible hybrid perovskite–based solar cells

We have used the concept based on low molecular–weight organic gelators to hybrid halide perovskite–based materials. Our measurements reveal that organic gelators beneficially influence the nucleation and growth of the perovskite precursor phase. This can be exploited for the performance that not only is enhanced by about 25% compared to solar cells where the active layer was produced without the use of a gelator but that also feature a higher stability to moisture and a reduced hysteresis. The proposed approach provides a general method to render the film–formation of hybrid perovskites more reliable and robust.

Contact person: Silvia Colella, NANOTEC-CNR Lecce