Swiss scientists have built a 4T tandem perovskite/CIGS mini-panel with a geometric fill factor of over 93%. It combines a 10.8%-efficient mini perovskite module and a 15.1%-efficient CIGS device.

Researchers have fabricated a perovskite solar module on a substrate with a total substrate size of 20 cm × 20 cm and a stabilized power conversion efficiency of 11.9%. “This is among the highest ...