A team of researchers from the Israeli Bar-Ilan University and the Universitat Jaume I, in Castello Spain have showed that the contact interface of the perovskite material in a perovskite-based solar cell is behind the drastic and random fluctuations that happen when the solar panels are tested.

The researchers have discovered a light-induced interfacial phenomena in hybrid perovskite solar cells between the n-type contact (TiO₂ or TiO₂/PCBM interlayer) and the perovskite absorber. By changing the n-type contact and measuring the solar cells under the same conditions, it was demonstrated that the light-induced phenomena originates at the interface.